Image_processor

This project contains a console application for processing images.

Supported filetypes

Input and output images are in the BMP file format.

BMP is using DIB header - BITMAPINFOHEADER.

There is an example here (Example_1) and here (test_script/data).

Usage

{./image_processor} {input filepath} {output filepath} [-{filter name 1} [filter param 1] [filter param 2] ...] [-{filter name 2} [filter param 1] [filter param 2] ...] ...

If no params given, app returns schema of usage.

Example

./image_processor input.bmp /tmp/output.bmp -crop 800 600 -gs -blur 0.5

In this example:

1. Image is loaded from input.bmp.
2. Image is cropped to 800х600 pixels, counting from top-left.
3. Image is converted to grayscale.
4. Blur with sigma 0.5 is applied.
5. Output image is saved in /tmp/output.bmp

If no filters are given, app saves input image to output filepath.

Supported filters

Crop (-crop width height)

Crops image to given width and height, counting from top-left.

If widht of height is greater than source image width and height, image is cropped to available area.

Grayscale (-gs)

Converts image to grayscale.

Negative (-neg)

Converts image to its Negative.

Sharpening (-sharp)

Sharpens image.

Edge Detection (-edge threshold)

Detects edges in image. Image is converted to grayscale, than threshold is applied.

Pixels with value greater than threshold become white, other become black.

Gaussian Blur (-blur sigma)

Gaussian blur, param – sigma.

Flash (-flash x y radius brightness min_brightness angle (yet not supported, can be any integer))

Draws flash on image in position (x, y) counting from bottom-right with given radius and brightness. All pixels with brightness lower than min_brightness become black.