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
Face blur	blur_faces=X	detects all faces in the image and applies blur to conceal them

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