readme.md


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# Separator

Command line tool to separate an image into background and foreground

## Usage

./main <filename> <new_filename> <fg_color> <bg_color> <new_color>

This will replace <fg_color> with <new_color> and make <bg_color> transparent.
It only handles two colors but correctly interpolates between the two and adds transparency accordingly.
Colors are entered as six hex digits without any annotations.

## Example
```bash
./main img.png img_separated.png 000000 ffffff ff0000
```

This works with an image with a black foreground on a white background.
The resulting image is red with a transparent background.
./main img.png img_separated.png 000000 ffffff ff0000