OpenCV Playing Card Detector with Python

OpenCV-Playing-Card-Detector

This is a Python program that uses OpenCV to detect and identify playing cards from a PiCamera video feed on a Raspberry Pi. Check out the YouTube video that describes what it does and how it works:

Usage

Download this repository to a directory and run CardDetector.py from that directory. Cards need to be placed on a dark background for the detector to work. Press 'q' to end the program.

The program was originally designed to run on a Raspberry Pi with a Linux OS, but it can also be run on Windows 7/8/10. To run on Windows, download and install Anaconda (https://www.anaconda.com/download/, Python 3.6 version), launch Anaconda Prompt, and execute the program by launching IDLE (type "idle" and press ENTER in the prompt) and opening/running the CardDetector.py file in IDLE. The Anaconda environment comes with the opencv and numpy packages installed, so you don't need to install those yourself. If you are running this on Windows, you will also need to change the program to use a USB camera, as described below.

The program allows you to use either a PiCamera or a USB camera. If using a USB camera, change line 38 in CardDetector.py to:

videostream = VideoStream.VideoStream((IM_WIDTH,IM_HEIGHT),FRAME_RATE,2,0).start()

The card detector will work best if you use isolated rank and suit images generated from your own cards. To do this, run Rank_Suit_Isolator.py to take pictures of your cards. It will ask you to take a picture of an Ace, then a Two, and so on. Then, it will ask you to take a picture of one card from each of the suits (Spades, Diamonds, Clubs, Hearts). As you take pictures of the cards, the script will automatically isolate the rank or suit and save them in the Card_Imgs directory (overwriting the existing images).

Files

CardDetector.py contains the main script

Cards.py has classes and functions that are used by CardDetector.py

PiVideoStream.py creates a video stream from the PiCamera, and is used by CardDetector.py

Rank_Suit_Isolator.py is a standalone script that can be used to isolate the rank and suit from a set of cards to create train images

Card_Imgs contains all the train images of the card ranks and suits

Dependencies

Python 3.6

OpenCV-Python 3.2.0 and numpy 1.8.2: See https://www.pyimagesearch.com/2016/04/18/install-guide-raspberry-pi-3-raspbian-jessie-opencv-3/ for how to build and install OpenCV-Python on the Raspberry Pi

picamera library:

sudo apt-get update
sudo apt-get install python-picamera python3-picamera

https://www.youtube.com/watch?v=m-QPjO-2IkA

Download Details:
Author: EdjeElectronics
Source Code: https://github.com/EdjeElectronics/OpenCV-Playing-Card-Detector
License:

#opencv  #python 

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Lambda, Map, Filter functions in python

Welcome to my Blog, In this article, we will learn python lambda function, Map function, and filter function.

Lambda function in python: Lambda is a one line anonymous function and lambda takes any number of arguments but can only have one expression and python lambda syntax is

Syntax: x = lambda arguments : expression

Now i will show you some python lambda function examples:

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Why use Python for Software Development

No programming language is pretty much as diverse as Python. It enables building cutting edge applications effortlessly. Developers are as yet investigating the full capability of end-to-end Python development services in various areas. 

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5 Reasons to Utilize Python for Programming Web Apps 

Python can do such numerous things that developers can't discover enough reasons to admire it. Python application development isn't restricted to web and enterprise applications. It is exceptionally adaptable and superb for a wide range of uses.

Robust frameworks 

Python is known for its tools and frameworks. There's a structure for everything. Django is helpful for building web applications, venture applications, logical applications, and mathematical processing. Flask is another web improvement framework with no conditions. 

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Python has a steadily developing community that offers enormous help. From amateurs to specialists, there's everybody. There are a lot of instructional exercises, documentation, and guides accessible for Python web development solutions. 

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Python is the greatest supporter of data science, Machine Learning, and Artificial Intelligence at any enterprise software development company. Its utilization cases in cutting edge applications are the most compelling motivation for its prosperity. Python is the second most well known tool after R for data analytics.

The simplicity of getting sorted out, overseeing, and visualizing information through unique libraries makes it ideal for data based applications. TensorFlow for neural networks and OpenCV for computer vision are two of Python's most well known use cases for Machine learning applications.

Summary

Thinking about the advances in programming and innovation, Python is a YES for an assorted scope of utilizations. Game development, web application development services, GUI advancement, ML and AI improvement, Enterprise and customer applications - every one of them uses Python to its full potential. 

The disadvantages of Python web improvement arrangements are regularly disregarded by developers and organizations because of the advantages it gives. They focus on quality over speed and performance over blunders. That is the reason it's a good idea to utilize Python for building the applications of the future.

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Learn Free how to create a virtual pen and eraser with python and OpenCV with source code and complete guide. This entire application is built fundamentally on contour detection. It can be thought of as something like closed color curves on compromises that have the same color or intensity, it’s like a blob. In this project we use color masking to get the binary mask of our target color pen, then we use the counter detection to find the location of this pen and the contour to find it.

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Python Tricks Every Developer Should Know

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In this tutorial, you’re going to learn a variety of Python tricks that you can use to write your Python code in a more readable and efficient way like a pro.

Let’s get started

Swapping value in Python

Instead of creating a temporary variable to hold the value of the one while swapping, you can do this instead

>>> FirstName = "kalebu"
>>> LastName = "Jordan"
>>> FirstName, LastName = LastName, FirstName 
>>> print(FirstName, LastName)
('Jordan', 'kalebu')

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How to Remove all Duplicate Files on your Drive via Python

Today you’re going to learn how to use Python programming in a way that can ultimately save a lot of space on your drive by removing all the duplicates.

Intro

In many situations you may find yourself having duplicates files on your disk and but when it comes to tracking and checking them manually it can tedious.

Heres a solution

Instead of tracking throughout your disk to see if there is a duplicate, you can automate the process using coding, by writing a program to recursively track through the disk and remove all the found duplicates and that’s what this article is about.

But How do we do it?

If we were to read the whole file and then compare it to the rest of the files recursively through the given directory it will take a very long time, then how do we do it?

The answer is hashing, with hashing can generate a given string of letters and numbers which act as the identity of a given file and if we find any other file with the same identity we gonna delete it.

There’s a variety of hashing algorithms out there such as

• md5
• sha1
• sha224, sha256, sha384 and sha512

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