virtual L_INT LBitmap::CLAHE(Alpha, TileSize, nfclipLimit, nx, uFlags)
Adjusts the image contrast using the Contrast Limited Adaptive Histogram Equalizer (CLAHE) method, Which uses several histograms each corresponding to a distinct section in the image while limiting the amplification of the noise in the image.
Non-negative real scalar specifying a distribution parameter.
Positive integer specifying the size of tiles ranging from 1 to 60.
Real scalar in the range [0, 1] that specifies a contrast enhancement limit. Higher numbers result in more contrast.
Multiple of 2 integer in the range [2, 1024] that specifies the number of bins for the histogram used in building a contrast enhancing transformation.
Flags specifying the desired histogram shape for the image tiles. Possible values are:
Value | Meaning |
---|---|
SUCCESS | The function was successful. |
< 1 | An error occurred. Refer to Return Codes. |
This function supports 8 and 16-bit grayscale images.
Win32, x64.
This example loads a bitmap and applies an CLAHE filter.
L_INT LBitmap__CLAHEBitmapExample(L_VOID)
{
L_INT nRet ;
LBitmap LeadBitmap ;
nRet = LeadBitmap.Load(MAKE_IMAGE_PATH(TEXT("IMAGE3.dcm")), 0,ORDER_BGR);
if(nRet != SUCCESS)
return nRet ;
/* Apply a CLAHE filter */
nRet = LeadBitmap.CLAHE(0.5f, 9, 0.04f, 512, CLAHE_RAYLIEH);
if(nRet !=SUCCESS)
return nRet;
return SUCCESS;
}
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