COS284PA05 - PPM Image Processing

Team Members

• Michael Todd (U23540223)
• Corne de Lange (U23788862)
• Cobus Botha (U23556502)

Project Overview

This project involves processing PPM (Portable Pixmap) images using assembly language. The tasks include reading a PPM file, computing CDF (Cumulative Distribution Function) values, applying histogram equalization, and writing the processed image back to a PPM file.

File Descriptions

task1_read_ppm_file.asm

This file contains the code to read a binary P6 format PPM file and create a linked pixel structure. Each pixel connects to adjacent pixels (above, below, left, right).

Key functions:

• readPPM: Reads the PPM file and initializes the pixel structure.
• skipComments: Skips comment lines in the PPM file.

task2_compute_cdf_values.asm

This file contains the code to compute the CDF values from the pixel data.

Key functions:

• computeCDFValues: Computes the histogram and CDF values for the image.

task3_histogram_equalisation.asm

This file contains the code to apply histogram equalization to the image using the computed CDF values.

Key functions:

• applyHistogramEqualization: Applies histogram equalization to the pixel data.

task4_write_ppm.asm

This file contains the code to write the processed image data back to a PPM file.

Key functions:

• writePPM: Writes the PPM header and pixel data to the output file.