GrayscaleStretch

Scaling the contrast of grayscaled images

Introduction

This project is a simple Java application that scales the contrast of grayscaled images. It calculates a percentile of the gray values in the image and then scales them to the full range of 0 to 255. The percentile can be adjusted by the user.

Example

Original	Output

The images above show a top view of the Jezero crater on Mars, taken from the interactive map of the Global CTX Mosaic of Mars. Special thanks to the scientists and engineers at Malin Space Science Systems and the Jet Propulsion Laboratory, who have built and operated CTX.

Usage

The application can be run from the command line with the following command:

java -jar GrayscaleSwitch.jar input.png output.png

or with adjusted values for the percentiles:

java -jar GrayscaleSwitch.jar input.png output.png 0.25 0.9

License