Copyright Razvan-Constantin Rus 312CAa 2022-2023

Description

This program is a CLI image editor for PGM and PPM files. It can rotate, crop, equalize, apply filters, print a histogram and save the results in either ascii or binary format.

Usage

1. LOAD <filename> - deletes the previously loaded picture and loads a new one from <filename>.

2. SELECT <x1> <x2> <y1> <y2> - selects a portion of the picture loaded.

3. SELECT ALL - selects the whole picture loaded.

4. EQUALIZE - if the loaded picture is a grayscale one, it equalizes the picture.

5. CROP - crops the picture, keeping the selected area

6. APPLY <FILTER> - applies one of the 4 filters: EDGE, SHARPEN, BLUR, GAUSSIAN BLUR.

7. HISTOGRAM <x> <y> - prints a histogram of the picture loaded, provided that it is a grayscale one. The histogram is made of y bins, while x is the max value of a bin.

8. ROTATE <angle> - Only works if the angle is a multiple of 90.

9. SAVE <filename> [ascii] - saves the loaded picture into . The ascii parameter is optional, saving the picture in ASCII format. Otherwise, the picture is saved in binary format.