static L_INT LBitmap::CountLUTColors(pLUT, ulLLUTLen, pNumberOfEntries, pFirstIndex, uFlags)
Gets the total number of entries between the start color and the end color, and the index of the last occurrence of the start color. The start and end colors are determined internally.
Pointer to a lookup table.
Pointer to a variable to be updated with total number of entries in start to end color.
Pointer to a variable to be updated with index of the last occurrence of the start color.
Flag that indicates whether the LUT belongs to a signed or unsigned image. Possible values are:
|COUNT_LUT_UNSIGNED||[0x0001] LUT belongs to a signed image.|
|COUNT_LUT_SIGNED||[0x0002] LUT belongs to an unsigned image.|
|SUCCESS||LUT is Linear (success).|
|0||LUT is not linear (fail).|
|<0||An error occurred. Refer to Return Codes.|
Suppose you have a LUT with 4096 colors, the first 200 colors are black and the last 30 are white: the rest of the colors between black and white are gray. This is what the function will provide:
In more detail this is:
Total number of entries: 4096 (0 - 4095)
First index of the end color: 4095 - 30 + 1 (+1 to add the first index of the end color to the range)
Number of occurrences of the starting color: 200 (0 - 199)
The last index of the start color: 199
Total number of entries: (4095 - 30 + 1) - 199 + 1
This function supports 12 and 16-bit grayscale images. Support for 12 and 16-bit grayscale images is available only in the Document/Medical toolkits.
This function supports signed data images.
get bitmap pLUT total number of entries in start to end colors and the index of the last occurrence of the start color.
L_INT LBitmap__CountLUTColorsExample(LBitmap * pBitmap, L_UINT * pNumberOfEntries, L_INT *pFirstIndex)
return LBitmap::CountLUTColors (pBitmap->GetHandle()->pLUT, pBitmap->GetHandle()->LUTLength,
pBitmap->GetHandle()->Flags.Signed? COUNT_LUT_SIGNED:COUNT_LUT_UNSIGNED );
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