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Medium Posts

2019

Learning Parameters, Part 5: AdaGrad, RMSProp, and Adam

Let’s look at gradient descent with adaptive learning rate.

Learning Parameters, Part 4: Tips For Adjusting Learning Rate, Line Search

Before moving on to advanced optimization algorithms let us revisit the problem of learning rate in gradient descent.

Learning Parameters, Part 3: Stochastic & Mini-Batch Gradient Descent

Let’s digress a bit from optimizers and talk about the stochastic versions of these algorithms.

Learning Parameters, Part 2: Momentum-Based & Nesterov Accelerated Gradient Descent

Let’s look at two simple, yet very useful variants of gradient descent.

Learning Parameters, Part 1: Gradient Descent

Gradient Descent is an iterative optimization algorithm for finding the (local) minimum of a function.

Learning Parameters, Part 0: Basic Stuff

A quick look at some basic stuff essential to understand how parameters are learned.

2018

Mouse Cursor Control Using Facial Movements — An HCI Application

This HCI application in Python(3.6) will allow you to control your mouse cursor with your facial movements, works with a regular webcam. Its hands-free, no wearable hardware or sensors needed.

Perceptron Learning Algorithm: A Graphical Explanation Of Why It Works

In this post I discuss the famous Perceptron Learning Algorithm proposed by Minsky and Papert in 1969.

Perceptron: The Artificial Neuron (An Essential Upgrade To The McCulloch-Pitts Neuron)

In this post, I talk about the perceptron model proposed before the ‘activation’ part came into the picture.

McCulloch-Pitts Neuron — Mankind’s First Mathematical Model Of A Biological Neuron

The very first step towards the perceptron we use today was taken in 1943 by McCulloch and Pitts, by "mimicking" the functionality of a biological neuron.

Tutorial: Selfie Filters Using Deep Learning And OpenCV (Facial Landmarks Detection)

This is a tutorial on how to build a python application that can put various sunglasses on a detected face (I am calling them ‘Selfie Filters’) by finding the Facial Keypoints (15 unique points).

Tutorial: Alphabet Recognition Through Gestures — A Deep Learning and OpenCV Application

This is a tutorial on how to build a deep learning application that can recognize alphabet written by an object-of-interest (a bottle cap in this case) in real-time.

Tutorial: Webcam Paint Application Using OpenCV

This is a tutorial on how to build an OpenCV application that can track an object’s movement, using which a user can draw on the screen by moving the object around.

IGNOU’s Post Graduate Diploma in Applied Statistics (PGDAST): Frequently Asked Questions

The point of this post is to answer questions (once and for all) I get asked about the PGDAST programme (offered by IGNOU).

IGNOU’s Post Graduate Diploma in Applied Statistics (PGDAST): Why A Data Science Enthusiast Must Care About it?

My objective here is to try and break down each and every course offered in the programme and show how they can relate to a learner in the data science field.