The color of an image includes the brightness, contrast, and sharpness. Alibaba Cloud Content Delivery Network (CDN) allows you to change the brightness, contrast, and sharpness of images on CDN nodes. This topic describes how to change the color of images and provides examples.

Note Image editing is a paid service. It is currently free of charge until further notice.


Set the following parameters:
  • bright: specifies the brightness of images.
  • contrast: specifies the contrast of images.
  • sharpen: specifies the sharpness of images.


The following table describes the parameters.
Parameter Description Example
brightness Specifies the brightness of images. Valid values: -100 to 100.,50
contrast Specifies the contrast of images. Valid values: -100 to 100.,50
sharpen Specifies the sharpness of images. Valid values: 50 to 399. We recommend that you use the following values: 50, 100, 150, 200, 250, and 300.,100