Point Blank Blog

Latest — Nov 26, 2020

THE MATHS BEHIND LOGISTIC REGRESSION

WHAT IS LOGISTIC REGRESSION? Logistic Regression is a Supervised statistical technique to find the probability of dependent variable(Classes present in the variable). SIGMOID FUNCTION In order to map predicted values to probabilities, we use the sigmoid function. The function maps any real value into another value between 0 and

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The advent of the microprocessor: Part I

The story of microprocessors dates back to the invention of transistors and integrated circuits(ICs). Invention of transistors was one of the most important milestones in the world of technology.Shockley, Brattain and Bardeen were credited for the invention of transistors and were awarded with nobel prize in physics in

Web View Fragment [Kotlin]

Web View is a view that allows developers to display web pages and HTML strings inside an application. There are umpteen tutorials available on “Web View in an activity” . Thus, this post won’t deal with it. Here, I will share how to use Web View in a fragment, using

My Google Internship Interview Experience

This is about my Google Internship interview experience (SDE Summer Intern 2020 North America). I made it to the final round but wasn’t selected. I learned a lot from the entire interview process and I hope that you find something useful and learn something from this little experience of

Beginner's guide to Convolutional neural network

The idea of convolutional neural networks is inspired by biological neural networks. Let's break down this neural network and try to understand it step by step. Firstly the convolution is a mathematical method for combining two signals and is one of the most important techniques in Digital signal processing.In

L1 and L2 Loss in Machine Learning

Overfitting is a phenomenon in which the model is trained too well over a specified data that it fails to recognize patterns outside the training set. This can be optimized using different methods like: * Weighted Regularization(L1 and L2) * Activity Regularization * Weight constraint * Dropout * Noise * Stopping the training process by

Image segmentation using OpenCV

Before getting into image segmentation let's try to understand what is the meaning of segmentation and what is the goal of segmentation in general. The goal of segmentation is to separate different parts of an image into sensible coherent parts.Image segmentation is a very important process in computer vision

How Media Players work and the science behind it

Entertainment has been a crucial part of our lives. It has been there as a source of enjoyment or amusement for centuries and we can say it's here to stay. Its evolution in phases is comparable to the evolution of Human Beings (Minus the Awkward Phase, of course). It started

Coalitional Game Theory

In game theory, a coalitional game is a kind of situation where a group of people works under the same strategy to achieve the common goal, unlike non-cooperative game theory where individuals compete with each other in order to maximize payoff. It is also known as cooperative game theory. We

Understanding Git

Okay, let's start from the very basics. What is git? Git is a type of version control system. At least that's what the technical definition says. Putting it in a more understandable manner, git is something which helps you keep track of the changes you make to various files on