Use Contrast to adjust both the contrast and brightness of an image.
For example, if you have the following image:
You can use the Contrast transformation to change it to:
If you add the IMQuery transformation to a policy, use the
im variable, and select Contrast, you can use a query string to add contrast to any image using this policy. See Syntax and Examples for the syntax for the query string parameter.
Updated about 2 years ago