With this function you can improve the contrast of your image.

Parameter

Description

Clip Limit (%)

Defines the value at which the histogram is clipped. It is used to avoid oversaturation of the image in homogeneous areas. It is determined by the normalized histogram of the local region. The higher the value is set, the higher the contrast will be.

Region Size (%)

Defines the size of every single region or tile where the local histogram is calculated as percentage of the image size. For example, a region size of 50% has the size of half the image.
A small region size increases the contrast but takes more calculation time.

Bins

Defines the number of histogram bins that is used to create the contrast enhancing transformation. A higher number of bins covers a greater dynamic range but increases calculation time.

Process Tiles Separately

Only visible for tile images.

Activated: Processes each tile region separately.

Difference between Result and Preview

The actual result of the function and the preview you see in the preview window can be different. This is caused by the parameter Region Size (%) and the different size of the preview and original image. The function splits the image into small regions and processes them individually based on the histogram of every single region. The histogram is usually related to the absolute region size. For the preview only the visible part of the image in the view is processed.