IM: Histogram Based Operations

IM - An Imaging Tool

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Histogram Based Operations
[Image Processing]

Detailed Description

See im_process_pon.h


Functions

void imProcessExpandHistogram (const imImage *src_image, imImage *dst_image, float percent)
void imProcessEqualizeHistogram (const imImage *src_image, imImage *dst_image)

Function Documentation

void imProcessExpandHistogram (  const imImage *  src_image,
imImage *  dst_image,
float  percent
) 
 

Performs an histogram expansion based on a percentage of the number of pixels.
Percentage defines an amount of pixels to include at the lowest level and at the highest level. If its is zero only empty counts of the histogram will be considered.
Images must be IM_BYTE/(IM_RGB or IM_GRAY). Can be done in place.
To expand the gammut without using the histogram, by just specifing the lowest and highest levels use the IM_GAMUT_EXPAND tone gammut operation (imProcessToneGamut).

im.ProcessExpandHistogram(src_image: imImage, dst_image: imImage, percent: number) [in Lua 5] 
im.ProcessExpandHistogramNew(src_image: imImage, percent: number) -> new_image: imImage [in Lua 5]

void imProcessEqualizeHistogram (  const imImage *  src_image,
imImage *  dst_image
) 
 

Performs an histogram equalization.
Images must be IM_BYTE/(IM_RGB or IM_GRAY). Can be done in place.

im.ProcessEqualizeHistogram(src_image: imImage, dst_image: imImage) [in Lua 5] 
im.ProcessEqualizeHistogramNew(src_image: imImage) -> new_image: imImage [in Lua 5]


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