Brightness

Increase or decrease the brightness of an image

http://localhost:8080/imagecache/bri=50/images/kitten.png
http://localhost:8080/imagecache/bri=-50/images/kitten.png

Contrast

Increase or decrease the contrast of an image

http://localhost:8080/imagecache/con=50/images/kitten.png
http://localhost:8080/imagecache/con=-50/images/kitten.png

Hue

Rotate the hue of an image with a value between -360 and 360 degrees

http://localhost:8080/imagecache/hue=90/images/kitten.png
http://localhost:8080/imagecache/hue=-90/images/kitten.png

Saturation

Increase or decrease the saturation of an image with an amount between -100% and 100%

http://localhost:8080/imagecache/sat=50/images/kitten.png
http://localhost:8080/imagecache/sat=-50/images/kitten.png

Tint

Tint an image with a layer of any color with a opacity value between 1% and 100%

http://localhost:8080/imagecache/tint=red,50/images/kitten.png
http://localhost:8080/imagecache/tint=blue,50/images/kitten.png

Invert

Invert the colors of the image

http://localhost:8080/imagecache/invert=true/images/kitten.png

Blur

Blur image with a radius

http://localhost:8080/imagecache/blur=15/images/kitten.png

Flip

Flip the image horizontally, vertically, or both

http://localhost:8080/imagecache/flip=h/images/kitten.png
http://localhost:8080/imagecache/flip=v/images/kitten.png
http://localhost:8080/imagecache/flip=vh/images/kitten.png

Rotate

Rotate image and then crop to largest possible rectangle with same aspect ratio

http://localhost:8080/imagecache/rot=45/images/kitten.png

Padding

Put x pixels of padding around the image

http://localhost:8080/imagecache/pad=50/images/kitten.png

Border

Draw an x pixel thick border around the image

http://localhost:8080/imagecache/border=50,red/images/kitten.png

Crop

Crop the image using a reactangle in the format "x,y,w,h"

http://localhost:8080/imagecache/crop=100,100,800,467/images/kitten.png

Resize

Resize the image

http://localhost:8080/imagecache/w=500/images/kitten.png
http://localhost:8080/imagecache/w=200&dpi=2/images/kitten.png
http://localhost:8080/imagecache/h=250/images/kitten.png
http://localhost:8080/imagecache/w=300&h=300/images/kitten.png