Tesseract: Simple Java Optical Character Recognition

Introduction

Developing symbols that have some value is a trait unique to humans. Recognizing these symbols and understanding the letters on an image is absolutely normal for us.

On the other hand, computers need something more concrete and organized to work with. They need a digital representation, not a graphical one.

Sometimes, this simply isn’t possible. Sometimes, we wish to automate a task of rewriting text from an image with our own hands.

For these tasks, Optical Character Recognition (OCR) was devised as a way to allow computers to “read” graphical content as text, similar to how humans do. Of course, these systems, while relatively accurate, can still be off quite a bit. Even if they are, fixing up the mistakes of the system is still a lot easier and faster than doing everything from scratch by hand.

Tesseract

The technology giant, Google, has been developing an OCR engine, Tesseract, which has a decades-long history since its original inception. It offers an API for a bunch of languages, though we’ll focus on the **Tesseract **Java API.

**Tesseract **is very easy to implement and subsequently isn’t overly powerful. It’s mainly used for reading computer-generated text on black and white images, which is done with decent accuracy. Although it’s not really meant for real-world text.

For real-world, advanced Optical Character Recognition, we’d be better off using something like Google Vision, which we’ll go over in another article.

#java #tesseract #spring-boot #convert-image-to-vector

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How to Install OpenJDK 11 on CentOS 8

What is OpenJDK?

OpenJDk or Open Java Development Kit is a free, open-source framework of the Java Platform, Standard Edition (or Java SE). It contains the virtual machine, the Java Class Library, and the Java compiler. The difference between the Oracle OpenJDK and Oracle JDK is that OpenJDK is a source code reference point for the open-source model. Simultaneously, the Oracle JDK is a continuation or advanced model of the OpenJDK, which is not open source and requires a license to use.

In this article, we will be installing OpenJDK on Centos 8.

#tutorials #alternatives #centos #centos 8 #configuration #dnf #frameworks #java #java development kit #java ee #java environment variables #java framework #java jdk #java jre #java platform #java sdk #java se #jdk #jre #open java development kit #open source #openjdk #openjdk 11 #openjdk 8 #openjdk runtime environment

Going Beyond Java 8: Local Variable Type Inference (var) - DZone Java

According to some surveys, such as JetBrains’s great survey, Java 8 is currently the most used version of Java, despite being a 2014 release.

What you are reading is one in a series of articles titled ‘Going beyond Java 8,’ inspired by the contents of my book, Java for Aliens. These articles will guide you step-by-step through the most important features introduced to the language, starting from version 9. The aim is to make you aware of how important it is to move forward from Java 8, explaining the enormous advantages that the latest versions of the language offer.

In this article, we will talk about the most important new feature introduced with Java 10. Officially called local variable type inference, this feature is better known as the **introduction of the word **var. Despite the complicated name, it is actually quite a simple feature to use. However, some observations need to be made before we can see the impact that the introduction of the word var has on other pre-existing characteristics.

#java #java 11 #java 10 #java 12 #var #java 14 #java 13 #java 15 #verbosity

Tesseract: Simple Java Optical Character Recognition

Introduction

Developing symbols that have some value is a trait unique to humans. Recognizing these symbols and understanding the letters on an image is absolutely normal for us.

On the other hand, computers need something more concrete and organized to work with. They need a digital representation, not a graphical one.

Sometimes, this simply isn’t possible. Sometimes, we wish to automate a task of rewriting text from an image with our own hands.

For these tasks, Optical Character Recognition (OCR) was devised as a way to allow computers to “read” graphical content as text, similar to how humans do. Of course, these systems, while relatively accurate, can still be off quite a bit. Even if they are, fixing up the mistakes of the system is still a lot easier and faster than doing everything from scratch by hand.

Tesseract

The technology giant, Google, has been developing an OCR engine, Tesseract, which has a decades-long history since its original inception. It offers an API for a bunch of languages, though we’ll focus on the **Tesseract **Java API.

**Tesseract **is very easy to implement and subsequently isn’t overly powerful. It’s mainly used for reading computer-generated text on black and white images, which is done with decent accuracy. Although it’s not really meant for real-world text.

For real-world, advanced Optical Character Recognition, we’d be better off using something like Google Vision, which we’ll go over in another article.

#java #tesseract #spring-boot #convert-image-to-vector

How to implement Optical Character Recognition technology? - TopDevelopers.co

OCR technology is implemented by applying technologies like ML, AI, and Data Science. Implementing OCR as a process returns the value depending upon the scanned data set.

#optical character recognition technology #ocr implementation #ocr technology #ocr system #optical character recognition

Spring Boot and Java 16 Records

In this article, we will discuss Java 16’s newest feature, Records. Then we will apply this knowledge and use it in conjunction with a Spring Boot application.

On March 16th, 2021, Java 16 was GA. With this new release, tons of new exciting features have been added. Check out the release notes to know more about these changes in detail. This article’s focus will be on Java Records, which got delivered with JEP 395. Records were first introduced in JDK 14 as a preview feature proposed by JEP 359, and with JDK 15, they remained in preview with JEP 384. However, with JDK 16, Records are no longer in preview.

I have picked Records because they are definitely the most favored feature added in Java 16, according to this Twitter poll by Java Champion Mala Gupta.

I also conducted a similar survey, but it was focused on features from Java 8 onwards. The results were not unexpected, as Java 8 is still widely used. Very unfortunate, though, as tons of new features and improvements are added to newer Java versions. But in terms of features, Java 8 was definitely a game-changer from a developer perspective.

So let’s discuss what the fuss is about Java Records.

#java #springboot #java programming #records #java tutorials #java programmer #java records #java 16