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About Me

Hi, I am Nikhil Kumar Jha, a 3rd-year Computer Science student at Indian Institute of Information Technology, Kalyani. I am very much interested in programming and like to explore new topics.I have knowledge of programming languages such as C, C++, Python, R, Dart etc. My main interest is in the topic of Machine Learning and Deep Learning, but I am anytime ready to learn something new.  And in this blog series, I will try to share with you all what I have learned.

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IC Recognition from a Printed Circuit Board

In this post, I will tell you about a project that I and my friend did last year. That was IC detection from a printed circuit board and then recognize it using optical character recognition. This is the application of Open Computer Vision (OpenCV). First of all, I will show you a flowchart that will describe our methodology and then I will discuss in detail. There are two main parts of our algorithm: Localizing each IC on the PCB, extracting and saving it. Then we use Tesseract OCR engine to read the labels of each detected IC. A. PREPROCESSING Before we apply any algorithms to our image we have to process it to obtain a proper  image. To save processing time we will resize the image maintaining the aspect ratio.  After that remove noise from the image using Gaussian Blur. B. SEGMENTATION First, we convert the RGB image to HSV (Hue, Saturation, Value) color space. The H channel creates a mask for all the integrated circuits on the board. We...
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Constructors In Dart Language

In the previous post, I have discussed Classes and Objects and continuing to that in this post I will cover Constructors. So what a constructor is? As in the previous post, we have created an object car inside the main function using the new keyword, it only creates a generic object without any properties or we can say it is just a spot in memory. And in the next few lines when we assign values to their attributes then it is completely constructed. Although, constructing directly inside the main function is a good idea but there is another way also by which we can form a constructor inside the class itself. But stop I am forgetting something. Before we go deep into constructors I want to tell you something about a very important thing this . this is used to denote the current value. Maybe it is not making sense at this time but it will be clear once we use it. Now coming back to constructors, it is a function or method like entity but without any return type. There are thr...
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Inheritance In Dart

So now continuing to the Blog series I will talk about the inheritance concept in this post. In previous blogs, we have seen how to create classes and objects and we can create as many classes as we want. But sometimes we observe that many classes have some properties same as another class. We should keep in mind a fact that creation of an object in memory is a very expensive task and we have to minimize it so one of the methods to do so is Inheritance.   So there are two terms: Parent Class and Child Class. The parent class has some features and the child class has similar features along with some extra specific features and the child can be inherited from the parent class so that there is no redundancy. Image source Google So talking about the above image we can see that the vehicle is the parent class and then the car, motorcycle, truck are child class of vehicle and following that again station wagon, jeep are the child class of car and so on. ...
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