Aditya Chatterjee's Blog, page 202

Covariant Return Type in Java

Covariant return type in an Object oriented programming language means that the return type of any method can be replaced by a narrower type when it is overridden in the subclass or child class. We have explored it in Java in depth.

Covariant return type is based on the Liskov substitution principle. This is a principle in Object oriented programming which states that, in a program, if X is a subtype of Y, then the objects of type Y may be replaced with objects of type X that means an object of...

Edge Detection using Laplacian Filter

Laplacian Filter (also known as Laplacian over Gaussian Filter (LoG)), in Machine Learning, is a convolution filter used in the convolution layer to detect edges in input.

Ever thought how the computer extracts a particular object from the scenery. How exactly we can differentiate between the object of interest and background.

Well a simple baseline answer could be: Edge Detection.

Before diving into the mechanics of it, let’s understand why specifically edge detection.

Try and look around you ...

Introduction to AA trees

AA trees were introduced by Arne Andersson in 1993 and hence the name AA. They are a type of balanced binary search trees. It was developed as a simpler alternative to red black trees.

It eliminates many of the conditions that need to be considered to maintain a red-black tree.

To understand AA trees, it is important to have a clear understanding of the concepts of a red black tree.

The tree below is an example of a red-black tree:

Properties of a red-black tree

Every node is either red or bl...

Getting started with AIML to create Chatbots

AIML stands for Artificial Intelligence Markup Language and is used to create Chatbots. Chatbots are software applications with whom you can have normal conversations instead following an elaborate syntax or commands.

Following article contains some basic utilities which can equip you to write a fulling functioning AIML bot.

UDC - Ultimate Default Category

It derives itself from eXtensible Markup Language, and so every opening tag has a closing Tag, shall be closed with a backward slash as fol...

Simplified: C++ STL Lists

Reading time: 30 minutes | Coding time: 10 minutes

List, as the name suggests, is the container to store the homogeneous data (data of the same type). It allocates memory based on a non-contiguous scheme. As compared to arrays/vector, the C++ list has some trade-offs. Before going forward,if you don't know about linked lists, I would recommend you to do check out the article on the singly-linked list and doubly-linked list by Rahul Kumar.

Unlike arrays that provide O(1) lookup time, in lists, w...

Sharpening Filters

Image preprocessing has been an integral part of computer vision and and can help boost the performance of the machine learning models significantly. Applying different types of filters to our image is what it means to perform image processing. Filters can help reduce the amount of noise in the image and help enhance their features.

In this article we will be focussing on sharpening filters.

Sharpening filters makes transition between features more recognizable and obvious as compared to smoot...

Template Class in C++

Template class in C++ is a feature that allows a programmer to write generic classes and functions which is useful as the same class/ function can handle data of multiple data types.

First, we need to know that C++ supports the use of Generic classes and Funtions. So what is this generic programming and how do we use it?

Generic Classes

Generic programming helps us to code and write our programs in such a way that they are independent of data type, yes independent of data type. Usually in prog...

Different types of Attribute Selectors in CSS

Attribute selectors in CSS allows you to select DOM elements based on the attributes they contain as well as the values of those attributes. We have explored different types of attribute selectors.

An HTML attribute provides additional information about an HTML element. There are various types of attributes and examples of few of commonly used attributes are-

The href Attribute-"HREF" stands for Hypertext Reference. HTML links are defined with the "a" tag. The link address is specified in the...

Model View Controller (MVC) and link with Django (MTV)

Reading time: 20 minutes | Question Solving time: 5 minutes

In this article, we'll be learning about the Model View Controller (MVC) architecture and how it is used in web development. We'll also learn about its use specifically in Django (Python).





Now, Web applications have seen a great evolution from simple HTML pages to complex designs and frameworks included. To handle the complexity and increase code reusability, different patterns were used in the implementation of these projects which m...

Application Structure of Django

Django is one of most widely used Python web development framework and powers several popular applications. In this article, we have explored the structure of a Django web application. It follows Model, Template and View (MTV).

What is Django

Django is free and open source web application framework, written in Python. The official project site describes Django as "a high-level Python Web framework that encourages rapid development and clean, pragmatic design.

Ok cool !,but What is Web Framework...