Here you may find information about the different filters such as their effect along with a link to a demo page.
Thresholding effect. All pixels whose gray values is greater than the specified threshold are marked white. However all pixels whose value is lower than the threshold are marked black.
demoWarhol effect. The result image looks like an Andy Warhol painting. The colors that are used are magenta pink and yellow. No replication of the image takes place. The colors are applied on only one image.
demoSolarization effect. The complement of the color channel values are used producing a solarization effect.
demoBrightness effect. A simple effect where the brightness of the image is being adjusted.
demo