Perform operations similar to those in image-editing applications.

Background &bg=

Sets the background color of the image. Supports a variety of color formats. In addition to the 140 color names supported by all modern browsers (listed here), it also accepts hexadecimal RGB and RBG alpha formats.

Valid hexadecimal formats:

  • 3 digit RGB: CCC
  • 4 digit ARGB (alpha): 5CCC
  • 6 digit RGB: CCCCCC
  • 8 digit ARGB (alpha): 55CCCCCC

More info: Issue #81 - Background setting.

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Blur &blur=

Adds a blur effect to the image. Use values between 0 and 100.

More info: Issue #69 - Allow blur transformation (with radius parameter).

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Brightness &bri=

Adjusts the image brightness. Use values between -100 and +100, where 0 represents no change.

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Contrast &con=

Adjusts the image contrast. Use values between -100 and +100, where 0 represents no change.

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Filter &filt=

Applies a filter effect to the image. Accepts greyscale, sepia, duotone or negate.

You can use &start and &stop to define the duotone colors. By default it will use &start=C83658 and &stop=D8E74F.

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Gamma &gam=

Adjusts the image gamma. Use values between 1 and 3. The default value is 2.2, a suitable approximation for sRGB images.

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Sharpen &sharp=

Sharpen the image. Performs a accurate sharpen of the L channel in the LAB color space. Use in combination with &sharpf= and &sharpj= to control the level of sharpening in "flat" and "jagged" areas.

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Tint &tint=New!

Tint the image using the provided chroma while preserving the image luminance. See here for the supported color formats.

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