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AVL.EqualizeImageHistogram(AvlNet.Image, AvlNet.Region, AvlNet.Image)

Maps image pixels to new values to achieve uniform distribution of intensities in the range (0, 255).

Namespace:AvlNet
Assembly:AVL.NET.dll

Syntax


public static void EqualizeImageHistogram(
	AvlNet.Image inImage,
	AvlNet.Region inRoi,
	out AvlNet.Image outImage
)

Parameters

inImage
Type: AvlNet.Image
Input image
inRoi
Type: AvlNet.Region
Range of pixels to be processed, or null.
outImage
Type: AvlNet.Image
Output image

Description

The filter applies non-linear mapping to image pixel values so that pixel intensities of the resulting image are evenly distributed in range from 0 to 255.

The operation computes the cumulative histogram \(C\) of inImage and the image size \(N\). Then the result is computed as follows:

\[ \begin{aligned} outImage[i,j] &= C[ inImage[i,j] ] \times \frac{255}{N} \end{aligned} \]

Examples

EqualizeImageHistogram run on example image.

See also