Convert from RGB to YCC
MT
| FwStatus | fwiRGBToYCC_8u_C3R | ( | const Fw8u * pSrc, int srcStep, Fw8u * pDst, int dstStep, FwiSize roiSize ); | |
| FwStatus | fwiRGBToYCC_8u_AC4R | ( | const Fw8u * pSrc, int srcStep, Fw8u * pDst, int dstStep, FwiSize roiSize ); | |
| FwStatus | fwiRGBToYCC_16u_C3R | ( | const Fw16u * pSrc, int srcStep, Fw16u * pDst, int dstStep, FwiSize roiSize ); | |
| FwStatus | fwiRGBToYCC_16u_AC4R | ( | const Fw16u * pSrc, int srcStep, Fw16u * pDst, int dstStep, FwiSize roiSize ); | |
| FwStatus | fwiRGBToYCC_16s_C3R | ( | const Fw16s * pSrc, int srcStep, Fw16s * pDst, int dstStep, FwiSize roiSize ); | |
| FwStatus | fwiRGBToYCC_16s_AC4R | ( | const Fw16s * pSrc, int srcStep, Fw16s * pDst, int dstStep, FwiSize roiSize ); | |
| FwStatus | fwiRGBToYCC_32f_C3R | ( | const Fw32f * pSrc, int srcStep, Fw32f * pDst, int dstStep, FwiSize roiSize ); | |
| FwStatus | fwiRGBToYCC_32f_AC4R | ( | const Fw32f * pSrc, int srcStep, Fw32f * pDst, int dstStep, FwiSize roiSize ); |
| dstStep | Destination buffer step size (width of the buffer in bytes). | |
| pDst | Pointer to a location in a destination buffer. | |
| pSrc | Pointer to a location in a source buffer. | |
| roiSize | Specifies the height and width of an ROI. | |
| srcStep | Source buffer step size (width of the buffer in bytes). |
These functions step through an ROI in a source buffer, convert the source data from the RGB color model to the YCC color space, and write the converted data to a destination buffer.
A gamma-corrected RGB image (pSrc) declared in the ROI is converted to a Photo YCC image (pDst) in four steps.
1. Normalize the input to the range [0 to 1] for all integer data types. Floating-point data must already be in the range [0...1]. 2. Apply the following formulas: Y = 0.299*R + 0.587*G + 0.114*B C1 = -0.299*R - 0.587*G + 0.886*B C2 = 0.701*R - 0.587*G - 0.114*B 3. Quantize the color model and convert to the Photo YCC model. Data is in the range [0 to 1]. Y = (1/1.402) * Y C1 = (111.4/255) * C1 + 156/255 C2 = (135.64/255) * C2 + 137/255 4. For integer destination data types, the Photo YCC color model is scaled to the full range.