Author: Fritz

In my last blog, I talked about how devs can use Kotlin coroutines to efficiently handle long-running tasks in their apps:

The method outlined works well when the user is using your app, but as soon as the user exits the app, the system kills the app and all the processes spawned by it. I faced this issue while working on AfterShoot when I had to run my machine learning model through all of a given user’s images.

Continue reading Using foreground services for executing long-running processes in Android

There are various techniques for handling text data in machine learning. In this article, we’ll look at working with word embeddings in Keras—one such technique. For a deeper introduction to Keras refer to this tutorial:

Continue reading Using a Keras Embedding Layer to Handle Text Data

Image colorization is an engaging topic in the field of image-to-image translation. Even though color photography was invented in 1907, It didn’t become popular for the average person until the 1960s because of its expensiveness and inaccessibility. All the photography and videography up until then was done on Black & White. Colorizing these images was impossible—until the DeOldify deep learning model came to life.

Continue reading Using DeOldify to Colorize and Restore Grayscale Images and Videos

When we learn something in our daily lives, similar things become very easy to learn because—we use our existing knowledge on the new task. Example: When I learned how to ride a bicycle, it became very easy to learn how to ride a motorcycle because in riding the bicycle, I knew I had to sit and maintain balance, hold the handles firmly, and peddle to accelerate. In using my prior knowledge, I could easily adapt to a motorcycle’s design and how it could be driven. And that is the general idea behind transfer learning.

Continue reading Transfer Learning with PyTorch

In this post, we’re going to learn the foundations of a very famous and interesting dimensionality reduction technique known as principal component analysis (PCA).

Specifically, we’re going to learn what principal components are, how data is concentrated within them, and learn about their orthogonality properties that make extraction of important data easier.

In other words, Principal component analysis (PCA) is a procedure for reducing the dimensionality of the variable space by representing it with a few orthogonal (uncorrelated) variables that capture most of its variability.

Continue reading Understanding the Mathematics behind Principal Component Analysis

In this post, we’re going to dive deep into one of the most popular and simple machine learning classification algorithms—the Naive Bayes algorithm, which is based on the Bayes Theorem for calculating probabilities and conditional probabilities.

Before we jump into the Naive Bayes classifier/algorithm, we need to know the fundamentals of Bayes Theorem, on which it’s based.

Continue reading Understanding the Mathematics Behind Naive Bayes

In 2015, Google established its first TPU center to power products like Google Calls, Translation, Photos, and Gmail. To make this technology accessible to all data scientists and developers, they soon after released the Cloud TPU, meant to provide an easy-to-use, scalable, and powerful cloud-based processing unit to run cutting-edge models on the cloud.

Continue reading Step-by-Step Use of Google Colab’s Free TPU

This tutorial uses the popular computer vision library OpenCV for building an image classifier that runs on Android devices.

The overall process looks like this. First, the color histogram of the hue channel from the HSV color space is extracted from the image dataset. Next, an artificial neural network (ANN) is built and trained by such features and then saved for later use in an Android app. An Android Studio project is then created, which imports the Android release of OpenCV. After being imported successfully, the saved trained ANN is loaded for making predictions.

Continue reading Image Classification on Android using OpenCV

Cat Face is the latest SnapML-powered Lens built by the team at Fritz AI. The Lens lets users draw photo-realistic cats and wear the result like a mask. If you haven’t already, try it out for yourself here:

Continue reading Training a Tiny Pix2Pix GAN for Snapchat

Following up from my earlier blogs on training and using TensorFlow models on the edge in Python, in this eighth blog post in this series, I’ll be talking about how to train a multi-label image classification model that can be used with TensorFlow.

Continue reading Training a Multi-Label Image Classification Model with Google Cloud AutoML