PPM Image Editor

Project Summary

The program reads a PPM image file, alter the RGB elements of each pixel, and prints the resulting image as a new PPM file.

PPM File Format

The PPM (or Portable Pix Map) image format is encoded in human-readable ASCII text. The image has two parts:

• Header (metadata)
• Body (pixel values)

Project Features

The project implements following functionalities:

• negate_red : negates the red number of each pixel
• negate_green : negates the green number of each pixel
• negate_blue : negates the blue number of each pixel
• flatten_red : sets the red value to zero
• flatten_green : sets the green value to zero
• flatten_blue : sets the blue value to zero
• flip_horizontal : flips each row horizontally
• grey_scale : sets each pixel value to the average of the three
• extreme_contrast : changes each color number to either the highest color number possible or to 0
• blur_horizontal : replaces the values of the red numbers of three adjacent pixels with their average
• random_noise : adds a random number to each color number or subtracts a random number

User Interface

The program has a simple command line interface.

Sample Output

Original Image	Greyscale
Flip Horizontal	Extreme Contrast
Blur Horizontal	Negate Red
Flatten RG	Random Noise

Reference

Further details about the project can be found here.