Machine Learning (ML) Using Histogram of Oriented Gradients (HOG) for Object Detection Principle behind histogram of oriented gradients is that local object appearance and shape within an image can be described by the distribution of intensity gradients or edge directions and hence, can be used for object detection
Machine Learning (ML) Learn about various Object Detection Techniques We will understand what is object detection, why we need to do object detection and the basic idea behind various techniques used to solved this problem. We start with the basic techniques like Viola Jones face detector to some of the advanced techniques like Single Shot Detector.
Software Engineering Creating a Very Simple Web API in Node.JS In this article, we will explore how to build a simple API in Node.JS. We will cover the basics of an API before going into the implementation details.
Software Engineering Work with Routing in Node.js In this article, we will take a look at how routing works in Node.js and set up different routes with combinations of pathname and query to test our idea.
Software Engineering Create a simple Web Server using Node.js In this tutorial, we will a simple web server in Node.js and run it locally on our machine listening to a port. It will response with a text data and HTTP headers.
Software Engineering Introduction to Modules in Node.js In this article, we will go through the three types of modules in Node.js namely in-built, third party and local modules and explore them with examples.
Software Engineering Introduction to Node.js In this article, we will take you through the basic idea of NodeJS and its package manager NPM, Installation guide and a basic example with When to use it
Machine Learning (ML) Build and use an Image Denoising Autoencoder model in Keras In this article, we will see How encoder and decoder part of autoencoder are reverse of each other? and How can we remove noise from image, i.e. Image denoising, using autoencoder? in Keras
Software Engineering Build an HTML form to insert data in a database in PHP MySQLi In this article, we are going to see how a form is made and how the details entered by the user are stored in a database. We will use PHP and MySQL
Problems on Binary Tree Copy a binary tree where each node has a random pointer We explored an algorithm to copy a binary tree with an additional pointer which points to any random node in the tree. We explored two techniques Naive solution using 2 traversals and Efficient solution using hashing.
Algorithms Find Maximum Subarray Sum using divide and conquer We are interested in to find maximum subarray sum (contiguous) of given 1-D array. Array may contain negative and positive numbers which makes this a difficult problem. Brute force will take O(N^2) time while a divide and conquer approach will take O(N log N) time.
Algorithms Converting Postfix to Infix using Stack We have explored an algorithm to convert a Postfix expression to Infix expression using Stack. This takes linear time O(N)
Data Structures Count inversions in an array using Fenwick Tree Fenwick tree is usually used for range query problems but it can be used to solve the problem of finding the number of inversions in an array efficiently.
Data Structures Understanding Fenwick tree (Binary Indexed Tree) with Range product Fenwick tree is a tree based data structure that is widely used to solve range query problems in logarithmic time O(log N) which would otherwise have taken linear time O(N). In this article, we have explained it in depth using the range product query problem.
Software Engineering Start using Local Storage in JavaScript in Browser Local storage is a key value storage such that you can store a data as a set of size 2 such as {key, value}. To get the value back, we need to pass key, then we get back value.
Software Engineering Work with files on the web using FileReader API in JavaScript FileReader object helps in reading data from a file or a Blob and store it in a JavaScript variable. The read is done asynchronously so as not to block the browser.
Software Engineering Get started with BLOBs in JavaScript BLOB (Binary Large OBject) is a data type which can be used to store binary data. We can convert our files and images into binary data and store it using BLOB. They are immutable objects that represent raw data.
Software Engineering Learn everything about Functions in JavaScript In this article, you will learn to use functions in JavaScript, how to pass functions as parameters or assign them to variables? and different types of functions like callback and arrow
Software Engineering Function Pointer in C++ A pointer is a variable that holds the address of another variable. Function pointers are similar and they point to functions. In this article, you will learn What is a function pointer and how to use it? and How to pass a function as an argument to another function?
Software Engineering Using CSS Selectors to work with specific HTML elements CSS Selectors are used to define the element(s) to which a particular set of CSS rules should be applied. The following article will take you through different selectors like class selector, attribute selectors, and selector combinations etc.
Software Engineering Learn to use Dask Dataframes Dask DataFrame is composed of many smaller Pandas DataFrames that are split row-wise along the index. An operation on a single Dask DataFrame triggers many operations on the Pandas DataFrames that constitutes it.
Problems on Binary Tree Learn how to traverse a Binary Tree (Inorder , Preorder , Postorder) In this article we will learn three Depth first traversals namely inorder, preorder and postorder and their use. These three types of traversals generally used in different types of binary tree. In summary, Inorder: left, root, right; Preorder: root, left, right and Postorder: left, right, root
Software Engineering Understand and use Static members in Java In this article, you will learn What are static members in Java?, When to use them? and When they can be a problem? Static means only one copy exists for the entire class irrespective of the number of objects that exists for that class.
Software Engineering Understanding and using Access Specifiers in Java Access specifiers are utilities/ code features that restrict the access to a particular code feature or data depending upon the source of the code requesting the access. In Java, they are private, public, protected and default.
Software Engineering Understanding Encapsulation in Java Encapsulation is an object oriented programming (OOP) implementation technique where we are related data members in a single unit (class) and define member functions to allow indirect and restricted control from the user side.
