How to use the command ppmdim (with examples)

The ppmdim command is used to dim a specified PPM image by a dim factor. This command is partly superseded by pamfunc -multiplier. The dim factor reduces the brightness of the image.

Use case 1: Dim the specified PPM image by dimfactor

Code:

ppmdim 0.6 path/to/input.ppm > path/to/output.ppm

Motivation: Dimming an image can be useful in various scenarios like creating a subdued or vintage effect, reducing image glare, or adjusting the brightness levels to match other images in a project. By using the ppmdim command with a dim factor, the desired dimming effect can be achieved.

Explanation:

• 0.6: The dim factor determines how much the brightness of the image should be reduced. In this case, the dim factor is set to 0.6, which means the image will be dimmed by 60%.
• path/to/input.ppm: This is the path to the input PPM image file that needs to be dimmed.
• > path/to/output.ppm: This specifies the path and file name where the dimmed PPM image should be saved.

Example output:

• The output will be a dimmed PPM image file located at the specified output path, with the brightness reduced by 60% compared to the original image.