Supported Image Format

Input and output image files must be in BMP format.

The BMP format supports many variations, but this project uses 24-bit uncompressed BMP without a color table. The DIB header type must be BITMAPINFOHEADER.

Example files in the required format can be found:

• In the Wikipedia article under "Example 1".
• In the test_script/data directory.

Important: During testing, ensure your test images are saved as 24-bit BMP.

---

Command-Line Argument Format

The command-line syntax is as follows:

{program_name} {input_file_path} {output_file_path} \
[-{filter_name_1} [filter_param_1] [filter_param_2] ...] \
[-{filter_name_2} [filter_param_1] [filter_param_2] ...] ...

If launched without arguments, the program displays a help message.

Example

./image_processor input.bmp /tmp/output.bmp -crop 800 600 -gs -vshrink 300

Step-by-step execution:

1. Loads the image from input.bmp.
2. Crops it to 800x600 pixels (starting from the top-left corner).
3. Converts it to grayscale.
4. Applies vertical resizing to a height of 300 pixels.
5. Saves the result to /tmp/output.bmp.

Notes:

• The filter list may be empty (saves the original image unchanged).
• Filters are applied in the order they appear in the command.

Filters

Filter	Description	Usage	Example
-gs	Convert image to grayscale.	-gs	-gs
-crop	Crop the image (top-left corner).	-crop <width> <height>	-crop 800 600
-sharp	Enhance image sharpness	-sharp	-sharp
-edge	Highlight edges with adjustable intensity.	-edge <threshold>	-edge 0.5
-vshrink	Vertically resize (shrink/stretch height).	-vshrink <new_height>	-vshrink 300
-hshrink	Horizontally resize (shrink/stretch width).	-hshrink <new_width>	-hshrink 400
-shrink	Resize to exact dimensions (may stretch).	-shrink <height> <width>	-shrink 300 400