Computer Vision – Face Detection

COMPUTER VISION What is it…? Computer Vision is mimicking the abilities of human vision by electronically perceiving and understanding an image. It is a broad term and includes a lot of domains like Gesture Recognition, Optical Character Recognition, Face detection and a lot more. In this article, we will be focussing on face detection and try to understand the key ideas that allow us to detect human faces in real time. It all begins with a pixel! As shown below, a digital representation of an image comprises a large number of pixels depending on the resolution of the image. Each pixel represents the smallest unit containing the…

Captcha in Ruby on Rails – Customize the use of captcha in the plugin validates_captcha

To implement captcha in RubyonRails, validates_captcha plugin can be a good option but a small customization i need with this plugin was to use it on some specific action and not to be validated the captcha field every time an instance of the model is saved or updated.
Here is a small work-around for its customization…
How […]

How to improve the image quality and generate random string image in the plugin validates_captcha

Validates captchais a good pluging to implement captcha in your rails application.
However i found that there is repetition of the string of the image and the quality of image is not that good. To get a good quality image and random string replace the code of the file /vendor/plugins/validates_captcha/lib/captcha_challenge.rb with the following code…

require ‘digest/sha1’
module AngryMidgetPluginsInc […]