1593851100
What I learned from my first Image Processing Project
Image processing is a method to perform some operations on an image, in order to get an enhanced image or to extract some useful information from it.
A pipeline is a some set of operations connected in a series, where the output of one is the input of the next one. In image processing, a task can be achieved through many different pipelines with different qualities.
My advise for anyone who is trying to start a project with a new framework is not to try to learn everything about that framework before the start of the project. You can get to know it while you are doing it. It’s better to have a general idea about what we can do with this technology and blueprint of the project. Lets take this project as a example.
In this project, our final goal is to extract large vessels and small vessels separately. The blood vessels were highlighted in the image because they were darker than others. So at first i thought if I am able to filter all the vessels by color(it does not work), then I can remove small vessels by smoothing or blurring and extract the large vessels. After that all I needed to do was subtract large vessels from all vessels and extract small vessels. This was my initial path to the goal.
Then I found a way to detect object using HSV color space. Here is the code.
import cv2
import numpy as np
def nothing(x):
pass
cv2.namedWindow("Tracking")
cv2.createTrackbar("LH", "Tracking", 0, 255, nothing)
cv2.createTrackbar("LS", "Tracking", 0, 255, nothing)
cv2.createTrackbar("LV", "Tracking", 0, 255, nothing)
cv2.createTrackbar("UH", "Tracking", 255, 255, nothing)
cv2.createTrackbar("US", "Tracking", 255, 255, nothing)
cv2.createTrackbar("UV", "Tracking", 255, 255, nothing)
while True:
frame = cv2.imread('Fundus Image.jpg')
hsv = cv2.cvtColor(frame, cv2.COLOR_BGR2HSV)
l_h = cv2.getTrackbarPos("LH", "Tracking")
l_s = cv2.getTrackbarPos("LS", "Tracking")
l_v = cv2.getTrackbarPos("LV", "Tracking")
u_h = cv2.getTrackbarPos("UH", "Tracking")
u_s = cv2.getTrackbarPos("US", "Tracking")
u_v = cv2.getTrackbarPos("UV", "Tracking")
l_b = np.array([l_h, l_s, l_v])
u_b = np.array([u_h, u_s, u_v])
mask = cv2.inRange(hsv, l_b, u_b)
res = cv2.bitwise_and(frame, frame, mask=mask)
cv2.imshow("frame", frame)
cv2.imshow("mask", mask)
cv2.imshow("res", res)
key = cv2.waitKey(1)
if key == 27:
break
cv2.destroyAllWindows()
mask & res output with trackbar
Here you can change parameters and see how the output changes. Click escape button to close it. The above figure was the best one I got by this and I was not satisfied with the outputs. Then I tried it with increasing brightness and contrast at the beginning. But it did not give me the thing I want. So I decided to move on to another method.
#python #blood-vessel #image-processing #segmentation #programming
What is GEEK
Buddha Community
1653123600
EasyMDE: Simple, Beautiful and Embeddable JavaScript Markdown Editor
EasyMDE - Markdown Editor
This repository is a fork of SimpleMDE, made by Sparksuite. Go to the dedicated section for more information.
A drop-in JavaScript text area replacement for writing beautiful and understandable Markdown. EasyMDE allows users who may be less experienced with Markdown to use familiar toolbar buttons and shortcuts.
In addition, the syntax is rendered while editing to clearly show the expected result. Headings are larger, emphasized words are italicized, links are underlined, etc.
EasyMDE also features both built-in auto saving and spell checking. The editor is entirely customizable, from theming to toolbar buttons and javascript hooks.
Quick access
Install EasyMDE
Via npm:
npm install easymde
Via the UNPKG CDN:
<link rel="stylesheet" href="https://unpkg.com/easymde/dist/easymde.min.css">
<script src="https://unpkg.com/easymde/dist/easymde.min.js"></script>
Or jsDelivr:
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/easymde/dist/easymde.min.css">
<script src="https://cdn.jsdelivr.net/npm/easymde/dist/easymde.min.js"></script>
How to use
Loading the editor
After installing and/or importing the module, you can load EasyMDE onto the first textarea element on the web page:
<textarea></textarea>
<script>
const easyMDE = new EasyMDE();
</script>
Alternatively you can select a specific textarea, via JavaScript:
<textarea id="my-text-area"></textarea>
<script>
const easyMDE = new EasyMDE({element: document.getElementById('my-text-area')});
</script>
Editor functions
Use easyMDE.value() to get the content of the editor:
<script>
easyMDE.value();
</script>
Use easyMDE.value(val) to set the content of the editor:
<script>
easyMDE.value('New input for **EasyMDE**');
</script>
Configuration
Options list
- autoDownloadFontAwesome: If set to
true, force downloads Font Awesome (used for icons). If set tofalse, prevents downloading. Defaults toundefined, which will intelligently check whether Font Awesome has already been included, then download accordingly. - autofocus: If set to
true, focuses the editor automatically. Defaults tofalse. - autosave: Saves the text that's being written and will load it back in the future. It will forget the text when the form it's contained in is submitted.
- enabled: If set to
true, saves the text automatically. Defaults tofalse. - delay: Delay between saves, in milliseconds. Defaults to
10000(10 seconds). - submit_delay: Delay before assuming that submit of the form failed and saving the text, in milliseconds. Defaults to
autosave.delayor10000(10 seconds). - uniqueId: You must set a unique string identifier so that EasyMDE can autosave. Something that separates this from other instances of EasyMDE elsewhere on your website.
- timeFormat: Set DateTimeFormat. More information see DateTimeFormat instances. Default
locale: en-US, format: hour:minute. - text: Set text for autosave.
- enabled: If set to
- autoRefresh: Useful, when initializing the editor in a hidden DOM node. If set to
{ delay: 300 }, it will check every 300 ms if the editor is visible and if positive, call CodeMirror'srefresh(). - blockStyles: Customize how certain buttons that style blocks of text behave.
- bold: Can be set to
**or__. Defaults to**. - code: Can be set to
```or~~~. Defaults to```. - italic: Can be set to
*or_. Defaults to*.
- bold: Can be set to
- unorderedListStyle: can be
*,-or+. Defaults to*. - scrollbarStyle: Chooses a scrollbar implementation. The default is "native", showing native scrollbars. The core library also provides the "null" style, which completely hides the scrollbars. Addons can implement additional scrollbar models.
- element: The DOM element for the
textareaelement to use. Defaults to the firsttextareaelement on the page. - forceSync: If set to
true, force text changes made in EasyMDE to be immediately stored in original text area. Defaults tofalse. - hideIcons: An array of icon names to hide. Can be used to hide specific icons shown by default without completely customizing the toolbar.
- indentWithTabs: If set to
false, indent using spaces instead of tabs. Defaults totrue. - initialValue: If set, will customize the initial value of the editor.
- previewImagesInEditor: - EasyMDE will show preview of images,
falseby default, preview for images will appear only for images on separate lines. - imagesPreviewHandler: - A custom function for handling the preview of images. Takes the parsed string between the parantheses of the image markdown
as argument and returns a string that serves as thesrcattribute of the<img>tag in the preview. Enables dynamic previewing of images in the frontend without having to upload them to a server, allows copy-pasting of images to the editor with preview. - insertTexts: Customize how certain buttons that insert text behave. Takes an array with two elements. The first element will be the text inserted before the cursor or highlight, and the second element will be inserted after. For example, this is the default link value:
["[", "](http://)"].- horizontalRule
- image
- link
- table
- lineNumbers: If set to
true, enables line numbers in the editor. - lineWrapping: If set to
false, disable line wrapping. Defaults totrue. - minHeight: Sets the minimum height for the composition area, before it starts auto-growing. Should be a string containing a valid CSS value like
"500px". Defaults to"300px". - maxHeight: Sets fixed height for the composition area.
minHeightoption will be ignored. Should be a string containing a valid CSS value like"500px". Defaults toundefined. - onToggleFullScreen: A function that gets called when the editor's full screen mode is toggled. The function will be passed a boolean as parameter,
truewhen the editor is currently going into full screen mode, orfalse. - parsingConfig: Adjust settings for parsing the Markdown during editing (not previewing).
- allowAtxHeaderWithoutSpace: If set to
true, will render headers without a space after the#. Defaults tofalse. - strikethrough: If set to
false, will not process GFM strikethrough syntax. Defaults totrue. - underscoresBreakWords: If set to
true, let underscores be a delimiter for separating words. Defaults tofalse.
- allowAtxHeaderWithoutSpace: If set to
- overlayMode: Pass a custom codemirror overlay mode to parse and style the Markdown during editing.
- mode: A codemirror mode object.
- combine: If set to
false, will replace CSS classes returned by the default Markdown mode. Otherwise the classes returned by the custom mode will be combined with the classes returned by the default mode. Defaults totrue.
- placeholder: If set, displays a custom placeholder message.
- previewClass: A string or array of strings that will be applied to the preview screen when activated. Defaults to
"editor-preview". - previewRender: Custom function for parsing the plaintext Markdown and returning HTML. Used when user previews.
- promptURLs: If set to
true, a JS alert window appears asking for the link or image URL. Defaults tofalse. - promptTexts: Customize the text used to prompt for URLs.
- image: The text to use when prompting for an image's URL. Defaults to
URL of the image:. - link: The text to use when prompting for a link's URL. Defaults to
URL for the link:.
- image: The text to use when prompting for an image's URL. Defaults to
- uploadImage: If set to
true, enables the image upload functionality, which can be triggered by drag and drop, copy-paste and through the browse-file window (opened when the user click on the upload-image icon). Defaults tofalse. - imageMaxSize: Maximum image size in bytes, checked before upload (note: never trust client, always check the image size at server-side). Defaults to
1024 * 1024 * 2(2 MB). - imageAccept: A comma-separated list of mime-types used to check image type before upload (note: never trust client, always check file types at server-side). Defaults to
image/png, image/jpeg. - imageUploadFunction: A custom function for handling the image upload. Using this function will render the options
imageMaxSize,imageAccept,imageUploadEndpointandimageCSRFTokenineffective.- The function gets a file and
onSuccessandonErrorcallback functions as parameters.onSuccess(imageUrl: string)andonError(errorMessage: string)
- The function gets a file and
- imageUploadEndpoint: The endpoint where the images data will be sent, via an asynchronous POST request. The server is supposed to save this image, and return a JSON response.
- if the request was successfully processed (HTTP 200 OK):
{"data": {"filePath": "<filePath>"}}where filePath is the path of the image (absolute ifimagePathAbsoluteis set to true, relative if otherwise); - otherwise:
{"error": "<errorCode>"}, where errorCode can benoFileGiven(HTTP 400 Bad Request),typeNotAllowed(HTTP 415 Unsupported Media Type),fileTooLarge(HTTP 413 Payload Too Large) orimportError(see errorMessages below). If errorCode is not one of the errorMessages, it is alerted unchanged to the user. This allows for server-side error messages. No default value.
- if the request was successfully processed (HTTP 200 OK):
- imagePathAbsolute: If set to
true, will treatimageUrlfromimageUploadFunctionand filePath returned fromimageUploadEndpointas an absolute rather than relative path, i.e. not prependwindow.location.originto it. - imageCSRFToken: CSRF token to include with AJAX call to upload image. For various instances like Django, Spring and Laravel.
- imageCSRFName: CSRF token filed name to include with AJAX call to upload image, applied when
imageCSRFTokenhas value, defaults tocsrfmiddlewaretoken. - imageCSRFHeader: If set to
true, passing CSRF token via header. Defaults tofalse, which pass CSRF through request body. - imageTexts: Texts displayed to the user (mainly on the status bar) for the import image feature, where
#image_name#,#image_size#and#image_max_size#will replaced by their respective values, that can be used for customization or internationalization:- sbInit: Status message displayed initially if
uploadImageis set totrue. Defaults toAttach files by drag and dropping or pasting from clipboard.. - sbOnDragEnter: Status message displayed when the user drags a file to the text area. Defaults to
Drop image to upload it.. - sbOnDrop: Status message displayed when the user drops a file in the text area. Defaults to
Uploading images #images_names#. - sbProgress: Status message displayed to show uploading progress. Defaults to
Uploading #file_name#: #progress#%. - sbOnUploaded: Status message displayed when the image has been uploaded. Defaults to
Uploaded #image_name#. - sizeUnits: A comma-separated list of units used to display messages with human-readable file sizes. Defaults to
B, KB, MB(example:218 KB). You can useB,KB,MBinstead if you prefer without whitespaces (218KB).
- sbInit: Status message displayed initially if
- errorMessages: Errors displayed to the user, using the
errorCallbackoption, where#image_name#,#image_size#and#image_max_size#will replaced by their respective values, that can be used for customization or internationalization:- noFileGiven: The server did not receive any file from the user. Defaults to
You must select a file.. - typeNotAllowed: The user send a file type which doesn't match the
imageAcceptlist, or the server returned this error code. Defaults toThis image type is not allowed.. - fileTooLarge: The size of the image being imported is bigger than the
imageMaxSize, or if the server returned this error code. Defaults toImage #image_name# is too big (#image_size#).\nMaximum file size is #image_max_size#.. - importError: An unexpected error occurred when uploading the image. Defaults to
Something went wrong when uploading the image #image_name#..
- noFileGiven: The server did not receive any file from the user. Defaults to
- errorCallback: A callback function used to define how to display an error message. Defaults to
(errorMessage) => alert(errorMessage). - renderingConfig: Adjust settings for parsing the Markdown during previewing (not editing).
- codeSyntaxHighlighting: If set to
true, will highlight using highlight.js. Defaults tofalse. To use this feature you must include highlight.js on your page or pass in using thehljsoption. For example, include the script and the CSS files like:<script src="https://cdn.jsdelivr.net/highlight.js/latest/highlight.min.js"></script><link rel="stylesheet" href="https://cdn.jsdelivr.net/highlight.js/latest/styles/github.min.css"> - hljs: An injectible instance of highlight.js. If you don't want to rely on the global namespace (
window.hljs), you can provide an instance here. Defaults toundefined. - markedOptions: Set the internal Markdown renderer's options. Other
renderingConfigoptions will take precedence. - singleLineBreaks: If set to
false, disable parsing GitHub Flavored Markdown (GFM) single line breaks. Defaults totrue. - sanitizerFunction: Custom function for sanitizing the HTML output of Markdown renderer.
- codeSyntaxHighlighting: If set to
- shortcuts: Keyboard shortcuts associated with this instance. Defaults to the array of shortcuts.
- showIcons: An array of icon names to show. Can be used to show specific icons hidden by default without completely customizing the toolbar.
- spellChecker: If set to
false, disable the spell checker. Defaults totrue. Optionally pass a CodeMirrorSpellChecker-compliant function. - inputStyle:
textareaorcontenteditable. Defaults totextareafor desktop andcontenteditablefor mobile.contenteditableoption is necessary to enable nativeSpellcheck. - nativeSpellcheck: If set to
false, disable native spell checker. Defaults totrue. - sideBySideFullscreen: If set to
false, allows side-by-side editing without going into fullscreen. Defaults totrue. - status: If set to
false, hide the status bar. Defaults to the array of built-in status bar items.- Optionally, you can set an array of status bar items to include, and in what order. You can even define your own custom status bar items.
- styleSelectedText: If set to
false, remove theCodeMirror-selectedtextclass from selected lines. Defaults totrue. - syncSideBySidePreviewScroll: If set to
false, disable syncing scroll in side by side mode. Defaults totrue. - tabSize: If set, customize the tab size. Defaults to
2. - theme: Override the theme. Defaults to
easymde. - toolbar: If set to
false, hide the toolbar. Defaults to the array of icons. - toolbarTips: If set to
false, disable toolbar button tips. Defaults totrue. - direction:
rtlorltr. Changes text direction to support right-to-left languages. Defaults toltr.
Options example
Most options demonstrate the non-default behavior:
const editor = new EasyMDE({
autofocus: true,
autosave: {
enabled: true,
uniqueId: "MyUniqueID",
delay: 1000,
submit_delay: 5000,
timeFormat: {
locale: 'en-US',
format: {
year: 'numeric',
month: 'long',
day: '2-digit',
hour: '2-digit',
minute: '2-digit',
},
},
text: "Autosaved: "
},
blockStyles: {
bold: "__",
italic: "_",
},
unorderedListStyle: "-",
element: document.getElementById("MyID"),
forceSync: true,
hideIcons: ["guide", "heading"],
indentWithTabs: false,
initialValue: "Hello world!",
insertTexts: {
horizontalRule: ["", "\n\n-----\n\n"],
image: ["![](http://", ")"],
link: ["[", "](https://)"],
table: ["", "\n\n| Column 1 | Column 2 | Column 3 |\n| -------- | -------- | -------- |\n| Text | Text | Text |\n\n"],
},
lineWrapping: false,
minHeight: "500px",
parsingConfig: {
allowAtxHeaderWithoutSpace: true,
strikethrough: false,
underscoresBreakWords: true,
},
placeholder: "Type here...",
previewClass: "my-custom-styling",
previewClass: ["my-custom-styling", "more-custom-styling"],
previewRender: (plainText) => customMarkdownParser(plainText), // Returns HTML from a custom parser
previewRender: (plainText, preview) => { // Async method
setTimeout(() => {
preview.innerHTML = customMarkdownParser(plainText);
}, 250);
return "Loading...";
},
promptURLs: true,
promptTexts: {
image: "Custom prompt for URL:",
link: "Custom prompt for URL:",
},
renderingConfig: {
singleLineBreaks: false,
codeSyntaxHighlighting: true,
sanitizerFunction: (renderedHTML) => {
// Using DOMPurify and only allowing <b> tags
return DOMPurify.sanitize(renderedHTML, {ALLOWED_TAGS: ['b']})
},
},
shortcuts: {
drawTable: "Cmd-Alt-T"
},
showIcons: ["code", "table"],
spellChecker: false,
status: false,
status: ["autosave", "lines", "words", "cursor"], // Optional usage
status: ["autosave", "lines", "words", "cursor", {
className: "keystrokes",
defaultValue: (el) => {
el.setAttribute('data-keystrokes', 0);
},
onUpdate: (el) => {
const keystrokes = Number(el.getAttribute('data-keystrokes')) + 1;
el.innerHTML = `${keystrokes} Keystrokes`;
el.setAttribute('data-keystrokes', keystrokes);
},
}], // Another optional usage, with a custom status bar item that counts keystrokes
styleSelectedText: false,
sideBySideFullscreen: false,
syncSideBySidePreviewScroll: false,
tabSize: 4,
toolbar: false,
toolbarTips: false,
});
Toolbar icons
Below are the built-in toolbar icons (only some of which are enabled by default), which can be reorganized however you like. "Name" is the name of the icon, referenced in the JavaScript. "Action" is either a function or a URL to open. "Class" is the class given to the icon. "Tooltip" is the small tooltip that appears via the title="" attribute. Note that shortcut hints are added automatically and reflect the specified action if it has a key bind assigned to it (i.e. with the value of action set to bold and that of tooltip set to Bold, the final text the user will see would be "Bold (Ctrl-B)").
Additionally, you can add a separator between any icons by adding "|" to the toolbar array.
| Name | Action | Tooltip Class |
|---|---|---|
| bold | toggleBold | Bold fa fa-bold |
| italic | toggleItalic | Italic fa fa-italic |
| strikethrough | toggleStrikethrough | Strikethrough fa fa-strikethrough |
| heading | toggleHeadingSmaller | Heading fa fa-header |
| heading-smaller | toggleHeadingSmaller | Smaller Heading fa fa-header |
| heading-bigger | toggleHeadingBigger | Bigger Heading fa fa-lg fa-header |
| heading-1 | toggleHeading1 | Big Heading fa fa-header header-1 |
| heading-2 | toggleHeading2 | Medium Heading fa fa-header header-2 |
| heading-3 | toggleHeading3 | Small Heading fa fa-header header-3 |
| code | toggleCodeBlock | Code fa fa-code |
| quote | toggleBlockquote | Quote fa fa-quote-left |
| unordered-list | toggleUnorderedList | Generic List fa fa-list-ul |
| ordered-list | toggleOrderedList | Numbered List fa fa-list-ol |
| clean-block | cleanBlock | Clean block fa fa-eraser |
| link | drawLink | Create Link fa fa-link |
| image | drawImage | Insert Image fa fa-picture-o |
| table | drawTable | Insert Table fa fa-table |
| horizontal-rule | drawHorizontalRule | Insert Horizontal Line fa fa-minus |
| preview | togglePreview | Toggle Preview fa fa-eye no-disable |
| side-by-side | toggleSideBySide | Toggle Side by Side fa fa-columns no-disable no-mobile |
| fullscreen | toggleFullScreen | Toggle Fullscreen fa fa-arrows-alt no-disable no-mobile |
| guide | This link | Markdown Guide fa fa-question-circle |
| undo | undo | Undo fa fa-undo |
| redo | redo | Redo fa fa-redo |
Toolbar customization
Customize the toolbar using the toolbar option.
Only the order of existing buttons:
const easyMDE = new EasyMDE({
toolbar: ["bold", "italic", "heading", "|", "quote"]
});
All information and/or add your own icons
const easyMDE = new EasyMDE({
toolbar: [
{
name: "bold",
action: EasyMDE.toggleBold,
className: "fa fa-bold",
title: "Bold",
},
"italics", // shortcut to pre-made button
{
name: "custom",
action: (editor) => {
// Add your own code
},
className: "fa fa-star",
title: "Custom Button",
attributes: { // for custom attributes
id: "custom-id",
"data-value": "custom value" // HTML5 data-* attributes need to be enclosed in quotation marks ("") because of the dash (-) in its name.
}
},
"|" // Separator
// [, ...]
]
});
Put some buttons on dropdown menu
const easyMDE = new EasyMDE({
toolbar: [{
name: "heading",
action: EasyMDE.toggleHeadingSmaller,
className: "fa fa-header",
title: "Headers",
},
"|",
{
name: "others",
className: "fa fa-blind",
title: "others buttons",
children: [
{
name: "image",
action: EasyMDE.drawImage,
className: "fa fa-picture-o",
title: "Image",
},
{
name: "quote",
action: EasyMDE.toggleBlockquote,
className: "fa fa-percent",
title: "Quote",
},
{
name: "link",
action: EasyMDE.drawLink,
className: "fa fa-link",
title: "Link",
}
]
},
// [, ...]
]
});
Keyboard shortcuts
EasyMDE comes with an array of predefined keyboard shortcuts, but they can be altered with a configuration option. The list of default ones is as follows:
| Shortcut (Windows / Linux) | Shortcut (macOS) | Action |
|---|---|---|
| Ctrl-' | Cmd-' | "toggleBlockquote" |
| Ctrl-B | Cmd-B | "toggleBold" |
| Ctrl-E | Cmd-E | "cleanBlock" |
| Ctrl-H | Cmd-H | "toggleHeadingSmaller" |
| Ctrl-I | Cmd-I | "toggleItalic" |
| Ctrl-K | Cmd-K | "drawLink" |
| Ctrl-L | Cmd-L | "toggleUnorderedList" |
| Ctrl-P | Cmd-P | "togglePreview" |
| Ctrl-Alt-C | Cmd-Alt-C | "toggleCodeBlock" |
| Ctrl-Alt-I | Cmd-Alt-I | "drawImage" |
| Ctrl-Alt-L | Cmd-Alt-L | "toggleOrderedList" |
| Shift-Ctrl-H | Shift-Cmd-H | "toggleHeadingBigger" |
| F9 | F9 | "toggleSideBySide" |
| F11 | F11 | "toggleFullScreen" |
Here is how you can change a few, while leaving others untouched:
const editor = new EasyMDE({
shortcuts: {
"toggleOrderedList": "Ctrl-Alt-K", // alter the shortcut for toggleOrderedList
"toggleCodeBlock": null, // unbind Ctrl-Alt-C
"drawTable": "Cmd-Alt-T", // bind Cmd-Alt-T to drawTable action, which doesn't come with a default shortcut
}
});
Shortcuts are automatically converted between platforms. If you define a shortcut as "Cmd-B", on PC that shortcut will be changed to "Ctrl-B". Conversely, a shortcut defined as "Ctrl-B" will become "Cmd-B" for Mac users.
The list of actions that can be bound is the same as the list of built-in actions available for toolbar buttons.
Advanced use
Event handling
You can catch the following list of events: https://codemirror.net/doc/manual.html#events
const easyMDE = new EasyMDE();
easyMDE.codemirror.on("change", () => {
console.log(easyMDE.value());
});
Removing EasyMDE from text area
You can revert to the initial text area by calling the toTextArea method. Note that this clears up the autosave (if enabled) associated with it. The text area will retain any text from the destroyed EasyMDE instance.
const easyMDE = new EasyMDE();
// ...
easyMDE.toTextArea();
easyMDE = null;
If you need to remove registered event listeners (when the editor is not needed anymore), call easyMDE.cleanup().
Useful methods
The following self-explanatory methods may be of use while developing with EasyMDE.
const easyMDE = new EasyMDE();
easyMDE.isPreviewActive(); // returns boolean
easyMDE.isSideBySideActive(); // returns boolean
easyMDE.isFullscreenActive(); // returns boolean
easyMDE.clearAutosavedValue(); // no returned value
How it works
EasyMDE is a continuation of SimpleMDE.
SimpleMDE began as an improvement of lepture's Editor project, but has now taken on an identity of its own. It is bundled with CodeMirror and depends on Font Awesome.
CodeMirror is the backbone of the project and parses much of the Markdown syntax as it's being written. This allows us to add styles to the Markdown that's being written. Additionally, a toolbar and status bar have been added to the top and bottom, respectively. Previews are rendered by Marked using GitHub Flavored Markdown (GFM).
SimpleMDE fork
I originally made this fork to implement FontAwesome 5 compatibility into SimpleMDE. When that was done I submitted a pull request, which has not been accepted yet. This, and the project being inactive since May 2017, triggered me to make more changes and try to put new life into the project.
Changes include:
- FontAwesome 5 compatibility
- Guide button works when editor is in preview mode
- Links are now
https://by default - Small styling changes
- Support for Node 8 and beyond
- Lots of refactored code
- Links in preview will open in a new tab by default
- TypeScript support
My intention is to continue development on this project, improving it and keeping it alive.
Hacking EasyMDE
You may want to edit this library to adapt its behavior to your needs. This can be done in some quick steps:
- Follow the prerequisites and installation instructions in the contribution guide;
- Do your changes;
- Run
gulpcommand, which will generate files:dist/easymde.min.cssanddist/easymde.min.js; - Copy-paste those files to your code base, and you are done.
Contributing
Want to contribute to EasyMDE? Thank you! We have a contribution guide just for you!
Author: Ionaru
Source Code: https://github.com/Ionaru/easy-markdown-editor
License: MIT license
1593867420
Top Android Projects with Source Code
Android Projects with Source Code – Your entry pass into the world of Android
Hello Everyone, welcome to this article, which is going to be really important to all those who’re in dilemma for their projects and the project submissions. This article is also going to help you if you’re an enthusiast looking forward to explore and enhance your Android skills. The reason is that we’re here to provide you the best ideas of Android Project with source code that you can choose as per your choice.
These project ideas are simple suggestions to help you deal with the difficulty of choosing the correct projects. In this article, we’ll see the project ideas from beginners level and later we’ll move on to intermediate to advance.
Android Projects with Source Code
Before working on real-time projects, it is recommended to create a sample hello world project in android studio and get a flavor of project creation as well as execution: Create your first android project
Android Projects for beginners
1. Calculator
Android Project: A calculator will be an easy application if you have just learned Android and coding for Java. This Application will simply take the input values and the operation to be performed from the users. After taking the input it’ll return the results to them on the screen. This is a really easy application and doesn’t need use of any particular package.
To make a calculator you’d need Android IDE, Kotlin/Java for coding, and for layout of your application, you’d need XML or JSON. For this, coding would be the same as that in any language, but in the form of an application. Not to forget creating a calculator initially will increase your logical thinking.
Once the user installs the calculator, they’re ready to use it even without the internet. They’ll enter the values, and the application will show them the value after performing the given operations on the entered operands.
Source Code: Simple Calculator Project
2. A Reminder App
Android Project: This is a good project for beginners. A Reminder App can help you set reminders for different events that you have throughout the day. It’ll help you stay updated with all your tasks for the day. It can be useful for all those who are not so good at organizing their plans and forget easily. This would be a simple application just whose task would be just to remind you of something at a particular time.
To make a Reminder App you need to code in Kotlin/Java and design the layout using XML or JSON. For the functionality of the app, you’d need to make use of AlarmManager Class and Notifications in Android.
In this, the user would be able to set reminders and time in the application. Users can schedule reminders that would remind them to drink water again and again throughout the day. Or to remind them of their medications.
3. Quiz Application
Android Project: Another beginner’s level project Idea can be a Quiz Application in android. Here you can provide the users with Quiz on various general knowledge topics. These practices will ensure that you’re able to set the layouts properly and slowly increase your pace of learning the Android application development. In this you’ll learn to use various Layout components at the same time understanding them better.
To make a quiz application you’ll need to code in Java and set layouts using xml or java whichever you prefer. You can also use JSON for the layouts whichever preferable.
In the app, questions would be asked and answers would be shown as multiple choices. The user selects the answer and gets shown on the screen if the answers are correct. In the end the final marks would be shown to the users.
4. Simple Tic-Tac-Toe
Android Project: Tic-Tac-Toe is a nice game, I guess most of you all are well aware of it. This will be a game for two players. In this android game, users would be putting X and O in the given 9 parts of a box one by one. The first player to arrange X or O in an adjacent line of three wins.
To build this game, you’d need Java and XML for Android Studio. And simply apply the logic on that. This game will have a set of three matches. So, it’ll also have a scoreboard. This scoreboard will show the final result at the end of one complete set.
Upon entering the game they’ll enter their names. And that’s when the game begins. They’ll touch one of the empty boxes present there and get their turn one by one. At the end of the game, there would be a winner declared.
Source Code: Tic Tac Toe Game Project
5. Stopwatch
Android Project: A stopwatch is another simple android project idea that will work the same as a normal handheld timepiece that measures the time elapsed between its activation and deactivation. This application will have three buttons that are: start, stop, and hold.
This application would need to use Java and XML. For this application, we need to set the timer properly as it is initially set to milliseconds, and that should be converted to minutes and then hours properly. The users can use this application and all they’d need to do is, start the stopwatch and then stop it when they are done. They can also pause the timer and continue it again when they like.
6. To Do App
Android Project: This is another very simple project idea for you as a beginner. This application as the name suggests will be a To-Do list holding app. It’ll store the users schedules and their upcoming meetings or events. In this application, users will be enabled to write their important notes as well. To make it safe, provide a login page before the user can access it.
So, this app will have a login page, sign-up page, logout system, and the area to write their tasks, events, or important notes. You can build it in android studio using Java and XML at ease. Using XML you can build the user interface as user-friendly as you can. And to store the users’ data, you can use SQLite enabling the users to even delete the data permanently.
Now for users, they will sign up and get access to the write section. Here the users can note down the things and store them permanently. Users can also alter the data or delete them. Finally, they can logout and also, login again and again whenever they like.
7. Roman to decimal converter
Android Project: This app is aimed at the conversion of Roman numbers to their significant decimal number. It’ll help to check the meaning of the roman numbers. Moreover, it will be easy to develop and will help you get your hands on coding and Android.
You need to use Android Studio, Java for coding and XML for interface. The application will take input from the users and convert them to decimal. Once it converts the Roman no. into decimal, it will show the results on the screen.
The users are supposed to just enter the Roman Number and they’ll get the decimal values on the screen. This can be a good android project for final year students.
8. Virtual Dice Roller
Android Project: Well, coming to this part that is Virtual Dice or a random no. generator. It is another simple but interesting app for computer science students. The only task that it would need to do would be to generate a number randomly. This can help people who’re often confused between two or more things.
Using a simple random number generator you can actually create something as good as this. All you’d need to do is get you hands-on OnClick listeners. And a good layout would be cherry on the cake.
The user’s task would be to set the range of the numbers and then click on the roll button. And the app will show them a randomly generated number. Isn’t it interesting ? Try soon!
9. A Scientific Calculator App
Android Project: This application is very important for you as a beginner as it will let you use your logical thinking and improve your programming skills. This is a scientific calculator that will help the users to do various calculations at ease.
To make this application you’d need to use Android Studio. Here you’d need to use arithmetic logics for the calculations. The user would need to give input to the application that will be in terms of numbers. After that, the user will give the operator as an input. Then the Application will calculate and generate the result on the user screen.
10. SMS App
Android Project: An SMS app is another easy but effective idea. It will let you send the SMS to various no. just in the same way as you use the default messaging application in your phone. This project will help you with better understanding of SMSManager in Android.
For this application, you would need to implement Java class SMSManager in Android. For the Layout you can use XML or JSON. Implementing SMSManager into the app is an easy task, so you would love this.
The user would be provided with the facility to text to whichever number they wish also, they’d be able to choose the numbers from the contact list. Another thing would be the Textbox, where they’ll enter their message. Once the message is entered they can happily click on the send button.
#android tutorials #android application final year project #android mini projects #android project for beginners #android project ideas #android project ideas for beginners #android projects #android projects for students #android projects with source code #android topics list #intermediate android projects #real-time android projects
1591903440
Preprocessing your images for machine learning (image recognition)
During my studies at JKU there was a task for preprocessing images for a machine learning project. It is necessary to clean the raw images before using them in a learning algorithm, so thats why we create a pre-processing function. I think it can be quite useful for others as well so I want to share a bit of my approach. The file is structured in a way that it is easy to understand and also should have a tutorial-like effect.
#image-recognition #image #image-classification #machine-learning #image-processing
1596328500
All about images -Types of Images:
Everything we see around us is nothing but an Image. we capture them using our mobile camera. In Signal Processing terms, Image is a signal which conveys some information. First I will tell you about what is a signal? how many types are they? Later part of this blog I will tell you about the images.
We are saying that image is signal. Signals are carry some information. It may be useful information or random noise. In Mathematics, Signal is function which depends on independent variables. The variables which are responsible for the altering the signal are called independent Variables. we have multidimensional signals. Here you will know about only three types of signals which are mainly used in edge cutting techniques such as Image processing, Computer Vision, Machine Learning, Deep Learning.
- 1D signal: Signals which has only one independent variable. Audio signals are the perfect example. It depends on the time. For instance, if you change time of an audio clip, you will listen sound at that particular time.
- 2D signal: Signals which depends on two independent variables. Image is an 2D signal as its information is only depends on its length and width.
- 3D signals : Signals which depends on three independent variables. Videos are the best examples for this. It is just motion of images with respect to time. Here image’s length and width are two independent variables and time is the third one.
Types of Images:
- Analog Images: These are natural images. The images which we see with our eye all are Analog image such as all physical objects. It has continuous values. Its amplitude is infinite.
- **Digital images: **By quantizing the analog images we can produce the digital images. But now-a-days, mostly all cameras produce digital images only. In digital Images, All values are discrete. Each location will have finite amplitude. Mostly we are using digital images for processing.
Every digital image will have group of pixels. Its coordinate system is starts from top coroner
Digital images contains stack of small rectangles. Each rectangle we call as Pixel. Pixel is the smallest unit in the image.Each Pixel will have particular value that is intensity. this intensity value is produced by the combination of colors. We have millions of colors. But our eye is perceive only three colors and their combinations. Those color we call primary colors i.e., Red, Green and Blue.
Why only those three colors ???
Do not think much. the reason is as our human eye has only three color receptors. Different combinations in the stimulation of the receptors enable the human eye to distinguish nearly 350000 colors
Lets move to our image topic:
As of now, we knew that image intensity values is combination of Red, Green and Blue. Each pixel in color image will have these three color channels. Generally, we represent each color value in 8 bits i.e., one byte.
Now, you can say how many bits will require at each pixel. We have 3 colors at each pixel and each color value will be stored in 8 bits. Then each pixel will have 24 bits. This 24 bit color image will display 2**24 different colors.
Now you have a question. how much memory does it require to store RGB image of shape 256*256 ???I think so explanation is not required, if you want to clear explanation please comment below.
#machine-learning #computer-vision #image-processing #deep-learning #image #deep learning
1595547778
10 Writing steps to create a good project brief - Mobile app development
Developing a mobile application can often be more challenging than it seems at first glance. Whether you’re a developer, UI designer, project lead or CEO of a mobile-based startup, writing good project briefs prior to development is pivotal. According to Tech Jury, 87% of smartphone users spend time exclusively on mobile apps, with 18-24-year-olds spending 66% of total digital time on mobile apps. Of that, 89% of the time is spent on just 18 apps depending on individual users’ preferences, making proper app planning crucial for success.
Today’s audiences know what they want and don’t want in their mobile apps, encouraging teams to carefully write their project plans before they approach development. But how do you properly write a mobile app development brief without sacrificing your vision and staying within the initial budget? Why should you do so in the first place? Let’s discuss that and more in greater detail.
Why a Good Mobile App Project Brief Matters?
It’s worth discussing the significance of mobile app project briefs before we tackle the writing process itself. In practice, a project brief is used as a reference tool for developers to remain focused on the client’s deliverables. Approaching the development process without written and approved documentation can lead to drastic, last-minute changes, misunderstanding, as well as a loss of resources and brand reputation.
For example, developing a mobile app that filters restaurants based on food type, such as Happy Cow, means that developers should stay focused on it. Knowing that such and such features, UI elements, and API are necessary will help team members collaborate better in order to meet certain expectations. Whether you develop an app under your brand’s banner or outsource coding and design services to would-be clients, briefs can provide you with several benefits:
- Clarity on what your mobile app project “is” and “isn’t” early in development
- Point of reference for developers, project leads, and clients throughout the cycle
- Smart allocation of available time and resources based on objective development criteria
- Streamlined project data storage for further app updates and iterations
Writing Steps to Create a Good Mobile App Project Brief
1. Establish the “You” Behind the App
Depending on how “open” your project is to the public, you will want to write a detailed section about who the developers are. Elements such as company name, address, project lead, project title, as well as contact information, should be included in this introductory segment. Regardless of whether you build an in-house app or outsource developers to a client, this section is used for easy document storage and access.
#android app #ios app #minimum viable product (mvp) #mobile app development #web development #how do you write a project design #how to write a brief #how to write a project summary #how to write project summary #program brief example #project brief #project brief example #project brief template #project proposal brief #simple project brief template