Image-Blur-3

Solution and Tests to the Columbia University Image #3 problem.

Project structure

• lib/image.rb - contains solution
• spec/image_spec.rb - includes three different examples

Description of class Image

• the method build_new_image - gets as a parameter an image and converts it to the same dimention image with only zeros
• the method set_ones - performs changes up, down, left and right to set one
• the method blur - takes as a parameter distance, converts it to a new image and return the result
• the method print_image - prints an image to a console

Solution explanation

• The constructor of the class Image takes as a parameter desired image for conversion. It creates instance variables
  • @original_image to store the original image;
  • @new_image to store the result after convertion;
  • @image_height and @image_width to store the array's dimention
  • @ones - to store new identificators where one is set before, and it's blank from the very beginning.
• When the method blur is called it will iterate through the two-dimension array and if meet one the following block will be executed the number of times equal specified distance in a parameter of the method. What should happen next? If distance more than one it requires to iterate through each element of array contains all ones set before. During iteration the method set_ones is called(please refere description about the method above). The method blur returns @new_image as a result of convertion.

Test execution

• Run bundle install
• Open terminal window
• From the project directory run rspec

Comments

Rspec test validation was perfomed only for single case example where image contains only one 1.