File Exchange

image thumbnail

The Warholer

version 1.4.0.1 (89.6 KB) by Matt Tearle
GUI that displays an 8-color version of an image, based on RGB thresholding.

1 Download

Updated 01 Sep 2016

View License

The color of each pixel in an image is specified by a combination of three values: red, green, and blue. These values typically take 256 levels, leading to 256^3 ~ 17 million possible colors.
In this GUI you can set a threshold value for each channel (R/G/B). If the color is above the threshold, it takes the maximum value (255); if not, it takes the minimum value (0). This "all or nothing" approach means that each color channel has only two possible levels, resulting in only 2^3 = 8 colors.

Hence, each of the 17 million possible colors is "rounded" to one of: red, green, blue, cyan, yellow, magenta, black, and white.

The result is an effect reminiscent of Andy Warhol's iconic celebrity paintings.

Comments and Ratings (2)

Matt Tearle

Thanks for that, Mohammad. Dumb copy-paste error on my part. I've submitted a corrected version.

Mohammad

Great App. However, I have found one bug here. When you change the threshold value of G and B channel, the changed value is always reflected to the R channel instead of being reflected to the corresponding channels.

Updates

1.4.0.1

Updated license

1.4.0.0

Fixed bug where changes to G and B channel were reflected in R channel instead.

1.1.0.0

Updated file to include as an App for R2012b.

MATLAB Release Compatibility
Created with R2012b
Compatible with any release
Platform Compatibility
Windows macOS Linux

Discover Live Editor

Create scripts with code, output, and formatted text in a single executable document.


Learn About Live Editor

warholer/