Image filters

Apply image effects and adjustments

Filters allow you to modify images on the fly by applying different effects.

Available filters

Filter	Syntax	Description
Brightness	bright=X | f=bright:X	adjusts the brightness of the image
Contrast	contrast=X | f=contrast:X	adjusts the contrast of the image
Saturate	saturate=X | f=saturate:X	adjusts the saturation of the image
Grayscale	gray=1 | f=gray | grey=1 | f=grey	converts the image to a black and white one
Color overlay	colorize=X | colourise=X	applies a color overlay
Pixelate	pixelate=X | f=pixelate:X | pixellate=X | f=pixellate:X	pixelates the image into X-pixel-sized blocks
Blur	blur=X | f=blur:X	applies Gaussian blur
Sharpen	sharp=X | f=sharp:X	applies unsharp mask to sharpen the image

Combining filters

To use more than one filter, you can either use separate parameters or concatenate them with commas into the f parameter:

Preview	Syntax
	Separate parameters: /sample.li/ny_doc.jpg?bright=15&contrast=30&gray=1
	Concatenate into the f parameter: /sample.li/ny_doc.jpg?f=bright:15,contrast:30,gray