Visible to Intel only — GUID: GUID-8A50C387-2E03-4395-A9DB-8592ADB9D264
Visible to Intel only — GUID: GUID-8A50C387-2E03-4395-A9DB-8592ADB9D264
RGBToHSV
Converts an RGB image to the HSV color model.
Syntax
IppStatus ippiRGBToHSV_<mod>(const Ipp<datatype>* pSrc, int srcStep, Ipp<datatype>* pDst, int dstStep, IppiSize roiSize);
Supported values for mod:
8u_C3R | 16u_C3R |
8u_AC4R | 16u_AC4R |
Include Files
ippcc.h
Domain Dependencies
Headers: ippcore.h, ippvm.h, ipps.h, ippi.h
Libraries: ippcore.lib, ippvm.lib, ipps.lib, ippi.lib
Parameters
pSrc |
Pointer to the source image ROI. |
srcStep |
Distance in bytes between starts of consecutive lines in the source image. |
pDst |
Pointer to the destination image ROI. |
dstStep |
Distance in bytes between starts of consecutive lines in the destination image. |
roiSize |
Size of the source and destination ROI in pixels. |
Description
This function operates with ROI (see Regions of Interest in Intel IPP).
This function converts the R'G'B' image pSrc to the HSV image pDst.
The conversion algorithm from RGB to HSV can be represented in pseudocode as follows:
// Value: V = max(R,G,B); // Saturation: temp = min(R,G,B); if V = 0 then // achromatics case S = 0// H = 0 else // chromatics case S = (V - temp)/V // Hue: Cr = (V - R) / (V - temp) Cg = (V - G) / (V - temp) Cb = (V - B) / (V - temp) if R = V then H = Cb - Cg if G = V then H = 2 + Cr - Cb if B = V then H = 4 + Cg - Cr H = 60*H if H < 0 then H = H + 360
The computed H,S,V values are scaled to the full range of the destination data type (see Table “Image Data Types and Ranges”).
Return Values
ippStsNoErr |
Indicates no error. Any other value indicates an error. |
ippStsNullPtrErr |
Indicates an error condition if pSrc or pDst is NULL. |
ippStsSizeErr |
Indicates an error condition if roiSize has a field with a zero or negative value. |