cv::COLOR_YUV420sp2RGBA = COLOR_YUV2RGBA_NV21, cv::COLOR_YUV420sp2BGRA = COLOR_YUV2BGRA_NV21, cv::COLOR_YUV2RGB_YV12 = 98, cv::COLOR_YUV2BGR_YV12 = 99, cv::COLOR_YUV2RGB_IYUV = 100, cv::COLOR_YUV2BGR_IYUV = 101, cv::COLOR_YUV2RGB_I420 = COLOR_YUV2RGB_IYUV, cv::COLOR_YUV2BGR_I420 = COLOR_YUV2BGR_IYUV, cv::COLOR_YUV420p2RGB = COLOR_YUV2RGB_YV12, cv::COLOR_YUV420p2BGR = COLOR_YUV2BGR_YV12, cv::COLOR_YUV2RGBA_YV12 = 102, cv::COLOR_YUV2BGRA_YV12 = 103, cv::COLOR_YUV2RGBA_IYUV = 104, cv::COLOR_YUV2BGRA_IYUV = 105, cv::COLOR_YUV2RGBA_I420 = COLOR_YUV2RGBA_IYUV, cv::COLOR_YUV2BGRA_I420 = COLOR_YUV2BGRA_IYUV, cv::COLOR_YUV420p2RGBA = COLOR_YUV2RGBA_YV12, cv::COLOR_YUV420p2BGRA = COLOR_YUV2BGRA_YV12, cv::COLOR_YUV2GRAY_420 = 106, cv::COLOR_YUV2GRAY_NV21 = COLOR_YUV2GRAY_420, cv::COLOR_YUV2GRAY_NV12 = COLOR_YUV2GRAY_420, cv::COLOR_YUV2GRAY_YV12 = COLOR_YUV2GRAY_420, cv::COLOR_YUV2GRAY_IYUV = COLOR_YUV2GRAY_420, cv::COLOR_YUV2GRAY_I420 = COLOR_YUV2GRAY_420, cv::COLOR_YUV420sp2GRAY = COLOR_YUV2GRAY_420, cv::COLOR_YUV420p2GRAY = COLOR_YUV2GRAY_420, cv::COLOR_YUV2RGB_UYVY = 107, cv::COLOR_YUV2BGR_UYVY = 108, cv::COLOR_YUV2RGB_Y422 = COLOR_YUV2RGB_UYVY, cv::COLOR_YUV2BGR_Y422 = COLOR_YUV2BGR_UYVY, cv::COLOR_YUV2RGB_UYNV = COLOR_YUV2RGB_UYVY, cv::COLOR_YUV2BGR_UYNV = COLOR_YUV2BGR_UYVY, cv::COLOR_YUV2RGBA_UYVY = 111, cv::COLOR_YUV2BGRA_UYVY = 112, cv::COLOR_YUV2RGBA_Y422 = COLOR_YUV2RGBA_UYVY, cv::COLOR_YUV2BGRA_Y422 = COLOR_YUV2BGRA_UYVY, cv::COLOR_YUV2RGBA_UYNV = COLOR_YUV2RGBA_UYVY, cv::COLOR_YUV2BGRA_UYNV = COLOR_YUV2BGRA_UYVY, cv::COLOR_YUV2RGB_YUY2 = 115, cv::COLOR_YUV2BGR_YUY2 = 116, cv::COLOR_YUV2RGB_YVYU = 117, cv::COLOR_YUV2BGR_YVYU = 118, cv::COLOR_YUV2RGB_YUYV = COLOR_YUV2RGB_YUY2, cv::COLOR_YUV2BGR_YUYV = COLOR_YUV2BGR_YUY2, cv::COLOR_YUV2RGB_YUNV = COLOR_YUV2RGB_YUY2, cv::COLOR_YUV2BGR_YUNV = COLOR_YUV2BGR_YUY2, cv::COLOR_YUV2RGBA_YUY2 = 119, cv::COLOR_YUV2BGRA_YUY2 = 120, cv::COLOR_YUV2RGBA_YVYU = 121, cv::COLOR_YUV2BGRA_YVYU = 122, cv::COLOR_YUV2RGBA_YUYV = COLOR_YUV2RGBA_YUY2, cv::COLOR_YUV2BGRA_YUYV = COLOR_YUV2BGRA_YUY2, cv::COLOR_YUV2RGBA_YUNV = COLOR_YUV2RGBA_YUY2, cv::COLOR_YUV2BGRA_YUNV = COLOR_YUV2BGRA_YUY2, cv::COLOR_YUV2GRAY_UYVY = 123, cv::COLOR_YUV2GRAY_YUY2 = 124, cv::COLOR_YUV2GRAY_Y422 = COLOR_YUV2GRAY_UYVY, cv::COLOR_YUV2GRAY_UYNV = COLOR_YUV2GRAY_UYVY, cv::COLOR_YUV2GRAY_YVYU = COLOR_YUV2GRAY_YUY2, cv::COLOR_YUV2GRAY_YUYV = COLOR_YUV2GRAY_YUY2, cv::COLOR_YUV2GRAY_YUNV = COLOR_YUV2GRAY_YUY2, cv::COLOR_RGBA2mRGBA = 125, cv::COLOR_mRGBA2RGBA = 126, cv::COLOR_RGB2YUV_I420 = 127, cv::COLOR_BGR2YUV_I420 = 128, cv::COLOR_RGB2YUV_IYUV = COLOR_RGB2YUV_I420, cv::COLOR_BGR2YUV_IYUV = COLOR_BGR2YUV_I420, cv::COLOR_RGBA2YUV_I420 = 129, cv::COLOR_BGRA2YUV_I420 = 130, cv::COLOR_RGBA2YUV_IYUV = COLOR_RGBA2YUV_I420, cv::COLOR_BGRA2YUV_IYUV = COLOR_BGRA2YUV_I420, cv::COLOR_RGB2YUV_YV12 = 131, cv::COLOR_BGR2YUV_YV12 = 132, cv::COLOR_RGBA2YUV_YV12 = 133, cv::COLOR_BGRA2YUV_YV12 = 134, cv::COLOR_BayerBG2BGR = 46, cv::COLOR_BayerGB2BGR = 47, cv::COLOR_BayerRG2BGR = 48, cv::COLOR_BayerGR2BGR = 49, cv::COLOR_BayerRGGB2BGR = COLOR_BayerBG2BGR, cv::COLOR_BayerGRBG2BGR = COLOR_BayerGB2BGR, cv::COLOR_BayerBGGR2BGR = COLOR_BayerRG2BGR, cv::COLOR_BayerGBRG2BGR = COLOR_BayerGR2BGR, cv::COLOR_BayerRGGB2RGB = COLOR_BayerBGGR2BGR, cv::COLOR_BayerGRBG2RGB = COLOR_BayerGBRG2BGR, cv::COLOR_BayerBGGR2RGB = COLOR_BayerRGGB2BGR, cv::COLOR_BayerGBRG2RGB = COLOR_BayerGRBG2BGR, cv::COLOR_BayerBG2RGB = COLOR_BayerRG2BGR, cv::COLOR_BayerGB2RGB = COLOR_BayerGR2BGR, cv::COLOR_BayerRG2RGB = COLOR_BayerBG2BGR, cv::COLOR_BayerGR2RGB = COLOR_BayerGB2BGR, cv::COLOR_BayerBG2GRAY = 86, cv::COLOR_BayerGB2GRAY = 87, cv::COLOR_BayerRG2GRAY = 88, cv::COLOR_BayerGR2GRAY = 89, cv::COLOR_BayerRGGB2GRAY = COLOR_BayerBG2GRAY, cv::COLOR_BayerGRBG2GRAY = COLOR_BayerGB2GRAY, cv::COLOR_BayerBGGR2GRAY = COLOR_BayerRG2GRAY, cv::COLOR_BayerGBRG2GRAY = COLOR_BayerGR2GRAY, cv::COLOR_BayerBG2BGR_VNG = 62, cv::COLOR_BayerGB2BGR_VNG = 63, cv::COLOR_BayerRG2BGR_VNG = 64, cv::COLOR_BayerGR2BGR_VNG = 65, cv::COLOR_BayerRGGB2BGR_VNG = COLOR_BayerBG2BGR_VNG, cv::COLOR_BayerGRBG2BGR_VNG = COLOR_BayerGB2BGR_VNG, cv::COLOR_BayerBGGR2BGR_VNG = COLOR_BayerRG2BGR_VNG, cv::COLOR_BayerGBRG2BGR_VNG = COLOR_BayerGR2BGR_VNG, cv::COLOR_BayerRGGB2RGB_VNG = COLOR_BayerBGGR2BGR_VNG, cv::COLOR_BayerGRBG2RGB_VNG = COLOR_BayerGBRG2BGR_VNG, cv::COLOR_BayerBGGR2RGB_VNG = COLOR_BayerRGGB2BGR_VNG, cv::COLOR_BayerGBRG2RGB_VNG = COLOR_BayerGRBG2BGR_VNG, cv::COLOR_BayerBG2RGB_VNG = COLOR_BayerRG2BGR_VNG, cv::COLOR_BayerGB2RGB_VNG = COLOR_BayerGR2BGR_VNG, cv::COLOR_BayerRG2RGB_VNG = COLOR_BayerBG2BGR_VNG, cv::COLOR_BayerGR2RGB_VNG = COLOR_BayerGB2BGR_VNG, cv::COLOR_BayerBG2BGR_EA = 135, cv::COLOR_BayerGB2BGR_EA = 136, cv::COLOR_BayerRG2BGR_EA = 137, cv::COLOR_BayerGR2BGR_EA = 138, cv::COLOR_BayerRGGB2BGR_EA = COLOR_BayerBG2BGR_EA, cv::COLOR_BayerGRBG2BGR_EA = COLOR_BayerGB2BGR_EA, cv::COLOR_BayerBGGR2BGR_EA = COLOR_BayerRG2BGR_EA, cv::COLOR_BayerGBRG2BGR_EA = COLOR_BayerGR2BGR_EA, cv::COLOR_BayerRGGB2RGB_EA = COLOR_BayerBGGR2BGR_EA, cv::COLOR_BayerGRBG2RGB_EA = COLOR_BayerGBRG2BGR_EA, cv::COLOR_BayerBGGR2RGB_EA = COLOR_BayerRGGB2BGR_EA, cv::COLOR_BayerGBRG2RGB_EA = COLOR_BayerGRBG2BGR_EA, cv::COLOR_BayerBG2RGB_EA = COLOR_BayerRG2BGR_EA, cv::COLOR_BayerGB2RGB_EA = COLOR_BayerGR2BGR_EA, cv::COLOR_BayerRG2RGB_EA = COLOR_BayerBG2BGR_EA, cv::COLOR_BayerGR2RGB_EA = COLOR_BayerGB2BGR_EA, cv::COLOR_BayerBG2BGRA = 139, cv::COLOR_BayerGB2BGRA = 140, cv::COLOR_BayerRG2BGRA = 141, cv::COLOR_BayerGR2BGRA = 142, cv::COLOR_BayerRGGB2BGRA = COLOR_BayerBG2BGRA, cv::COLOR_BayerGRBG2BGRA = COLOR_BayerGB2BGRA, cv::COLOR_BayerBGGR2BGRA = COLOR_BayerRG2BGRA, cv::COLOR_BayerGBRG2BGRA = COLOR_BayerGR2BGRA, cv::COLOR_BayerRGGB2RGBA = COLOR_BayerBGGR2BGRA, cv::COLOR_BayerGRBG2RGBA = COLOR_BayerGBRG2BGRA, cv::COLOR_BayerBGGR2RGBA = COLOR_BayerRGGB2BGRA, cv::COLOR_BayerGBRG2RGBA = COLOR_BayerGRBG2BGRA, cv::COLOR_BayerBG2RGBA = COLOR_BayerRG2BGRA, cv::COLOR_BayerGB2RGBA = COLOR_BayerGR2BGRA, cv::COLOR_BayerRG2RGBA = COLOR_BayerBG2BGRA, cv::COLOR_BayerGR2RGBA = COLOR_BayerGB2BGRA, cv::COLOR_COLORCVT_MAX = 143 Functions void cv::cvtColor ( InputArray src, OutputArray dst, int code, int dstCn=0)  Converts an image from one color space to another. More...
void cv::cvtColorTwoPlane ( InputArray src1, InputArray src2, OutputArray dst, int code)  Converts an image from one color space to another where the source image is stored in two planes. More...
void cv::demosaicing ( InputArray src, OutputArray dst, int code, int dstCn=0)  main function for all demosaicing processes More...

Detailed Description

Enumeration Type Documentation

◆ ColorConversionCodes

the color conversion codes

See also

Color conversions

Enumerator COLOR_BGR2BGRA

add alpha channel to RGB or BGR image

COLOR_RGB2RGBA COLOR_BGRA2BGR

remove alpha channel from RGB or BGR image

COLOR_RGBA2RGB COLOR_BGR2RGBA

convert between RGB and BGR color spaces (with or without alpha channel)

COLOR_RGB2BGRA COLOR_RGBA2BGR COLOR_BGRA2RGB COLOR_BGR2RGB COLOR_RGB2BGR COLOR_BGRA2RGBA COLOR_RGBA2BGRA COLOR_BGR2GRAY

convert between RGB/BGR and grayscale, color conversions

COLOR_RGB2GRAY COLOR_GRAY2BGR COLOR_GRAY2RGB COLOR_GRAY2BGRA COLOR_GRAY2RGBA COLOR_BGRA2GRAY COLOR_RGBA2GRAY COLOR_BGR2BGR565

convert between RGB/BGR and BGR565 (16-bit images)

COLOR_RGB2BGR565 COLOR_BGR5652BGR COLOR_BGR5652RGB COLOR_BGRA2BGR565 COLOR_RGBA2BGR565 COLOR_BGR5652BGRA COLOR_BGR5652RGBA COLOR_GRAY2BGR565

convert between grayscale to BGR565 (16-bit images)

COLOR_BGR5652GRAY COLOR_BGR2BGR555

convert between RGB/BGR and BGR555 (16-bit images)

COLOR_RGB2BGR555 COLOR_BGR5552BGR COLOR_BGR5552RGB COLOR_BGRA2BGR555 COLOR_RGBA2BGR555 COLOR_BGR5552BGRA COLOR_BGR5552RGBA COLOR_GRAY2BGR555

convert between grayscale and BGR555 (16-bit images)

COLOR_BGR5552GRAY COLOR_BGR2XYZ

convert RGB/BGR to CIE XYZ, color conversions

COLOR_RGB2XYZ COLOR_XYZ2BGR COLOR_XYZ2RGB COLOR_BGR2YCrCb

convert RGB/BGR to luma-chroma (aka YCC), color conversions

COLOR_RGB2YCrCb COLOR_YCrCb2BGR COLOR_YCrCb2RGB COLOR_BGR2HSV

convert RGB/BGR to HSV (hue saturation value) with H range 0..180 if 8 bit image, color conversions

COLOR_RGB2HSV COLOR_BGR2Lab

convert RGB/BGR to CIE Lab, color conversions

COLOR_RGB2Lab COLOR_BGR2Luv

convert RGB/BGR to CIE Luv, color conversions

COLOR_RGB2Luv COLOR_BGR2HLS

convert RGB/BGR to HLS (hue lightness saturation) with H range 0..180 if 8 bit image, color conversions

COLOR_RGB2HLS COLOR_HSV2BGR

backward conversions HSV to RGB/BGR with H range 0..180 if 8 bit image

COLOR_HSV2RGB COLOR_Lab2BGR COLOR_Lab2RGB COLOR_Luv2BGR COLOR_Luv2RGB COLOR_HLS2BGR

backward conversions HLS to RGB/BGR with H range 0..180 if 8 bit image

COLOR_HLS2RGB COLOR_BGR2HSV_FULL

convert RGB/BGR to HSV (hue saturation value) with H range 0..255 if 8 bit image, color conversions

COLOR_RGB2HSV_FULL COLOR_BGR2HLS_FULL

convert RGB/BGR to HLS (hue lightness saturation) with H range 0..255 if 8 bit image, color conversions

COLOR_RGB2HLS_FULL COLOR_HSV2BGR_FULL

backward conversions HSV to RGB/BGR with H range 0..255 if 8 bit image

COLOR_HSV2RGB_FULL COLOR_HLS2BGR_FULL

backward conversions HLS to RGB/BGR with H range 0..255 if 8 bit image

COLOR_HLS2RGB_FULL COLOR_LBGR2Lab COLOR_LRGB2Lab COLOR_LBGR2Luv COLOR_LRGB2Luv COLOR_Lab2LBGR COLOR_Lab2LRGB COLOR_Luv2LBGR COLOR_Luv2LRGB COLOR_BGR2YUV

convert between RGB/BGR and YUV

COLOR_RGB2YUV COLOR_YUV2BGR COLOR_YUV2RGB COLOR_YUV2RGB_NV12

YUV 4:2:0 family to RGB.

COLOR_YUV2BGR_NV12 COLOR_YUV2RGB_NV21 COLOR_YUV2BGR_NV21 COLOR_YUV420sp2RGB COLOR_YUV420sp2BGR COLOR_YUV2RGBA_NV12 COLOR_YUV2BGRA_NV12 COLOR_YUV2RGBA_NV21 COLOR_YUV2BGRA_NV21 COLOR_YUV420sp2RGBA COLOR_YUV420sp2BGRA COLOR_YUV2RGB_YV12 COLOR_YUV2BGR_YV12 COLOR_YUV2RGB_IYUV COLOR_YUV2BGR_IYUV COLOR_YUV2RGB_I420 COLOR_YUV2BGR_I420 COLOR_YUV420p2RGB COLOR_YUV420p2BGR COLOR_YUV2RGBA_YV12 COLOR_YUV2BGRA_YV12 COLOR_YUV2RGBA_IYUV COLOR_YUV2BGRA_IYUV COLOR_YUV2RGBA_I420 COLOR_YUV2BGRA_I420 COLOR_YUV420p2RGBA COLOR_YUV420p2BGRA COLOR_YUV2GRAY_420 COLOR_YUV2GRAY_NV21 COLOR_YUV2GRAY_NV12 COLOR_YUV2GRAY_YV12 COLOR_YUV2GRAY_IYUV COLOR_YUV2GRAY_I420 COLOR_YUV420sp2GRAY COLOR_YUV420p2GRAY COLOR_YUV2RGB_UYVY

YUV 4:2:2 family to RGB.

COLOR_YUV2BGR_UYVY COLOR_YUV2RGB_Y422 COLOR_YUV2BGR_Y422 COLOR_YUV2RGB_UYNV COLOR_YUV2BGR_UYNV COLOR_YUV2RGBA_UYVY COLOR_YUV2BGRA_UYVY COLOR_YUV2RGBA_Y422 COLOR_YUV2BGRA_Y422 COLOR_YUV2RGBA_UYNV COLOR_YUV2BGRA_UYNV COLOR_YUV2RGB_YUY2 COLOR_YUV2BGR_YUY2 COLOR_YUV2RGB_YVYU COLOR_YUV2BGR_YVYU COLOR_YUV2RGB_YUYV COLOR_YUV2BGR_YUYV COLOR_YUV2RGB_YUNV COLOR_YUV2BGR_YUNV COLOR_YUV2RGBA_YUY2 COLOR_YUV2BGRA_YUY2 COLOR_YUV2RGBA_YVYU COLOR_YUV2BGRA_YVYU COLOR_YUV2RGBA_YUYV COLOR_YUV2BGRA_YUYV COLOR_YUV2RGBA_YUNV COLOR_YUV2BGRA_YUNV COLOR_YUV2GRAY_UYVY COLOR_YUV2GRAY_YUY2 COLOR_YUV2GRAY_Y422 COLOR_YUV2GRAY_UYNV COLOR_YUV2GRAY_YVYU COLOR_YUV2GRAY_YUYV COLOR_YUV2GRAY_YUNV COLOR_RGBA2mRGBA

alpha premultiplication

COLOR_mRGBA2RGBA COLOR_RGB2YUV_I420

RGB to YUV 4:2:0 family.

COLOR_BGR2YUV_I420 COLOR_RGB2YUV_IYUV COLOR_BGR2YUV_IYUV COLOR_RGBA2YUV_I420 COLOR_BGRA2YUV_I420 COLOR_RGBA2YUV_IYUV COLOR_BGRA2YUV_IYUV COLOR_RGB2YUV_YV12 COLOR_BGR2YUV_YV12 COLOR_RGBA2YUV_YV12 COLOR_BGRA2YUV_YV12 COLOR_BayerBG2BGR

Demosaicing, see color conversions for additional information.

equivalent to RGGB Bayer pattern

COLOR_BayerGB2BGR

equivalent to GRBG Bayer pattern

COLOR_BayerRG2BGR

equivalent to BGGR Bayer pattern

COLOR_BayerGR2BGR

equivalent to GBRG Bayer pattern

COLOR_BayerRGGB2BGR COLOR_BayerGRBG2BGR COLOR_BayerBGGR2BGR COLOR_BayerGBRG2BGR COLOR_BayerRGGB2RGB COLOR_BayerGRBG2RGB COLOR_BayerBGGR2RGB COLOR_BayerGBRG2RGB COLOR_BayerBG2RGB

equivalent to RGGB Bayer pattern

COLOR_BayerGB2RGB

equivalent to GRBG Bayer pattern

COLOR_BayerRG2RGB

equivalent to BGGR Bayer pattern

COLOR_BayerGR2RGB

equivalent to GBRG Bayer pattern

COLOR_BayerBG2GRAY

equivalent to RGGB Bayer pattern

COLOR_BayerGB2GRAY

equivalent to GRBG Bayer pattern

COLOR_BayerRG2GRAY

equivalent to BGGR Bayer pattern

COLOR_BayerGR2GRAY

equivalent to GBRG Bayer pattern

COLOR_BayerRGGB2GRAY COLOR_BayerGRBG2GRAY COLOR_BayerBGGR2GRAY COLOR_BayerGBRG2GRAY COLOR_BayerBG2BGR_VNG

Demosaicing using Variable Number of Gradients.

equivalent to RGGB Bayer pattern

COLOR_BayerGB2BGR_VNG

equivalent to GRBG Bayer pattern

COLOR_BayerRG2BGR_VNG

equivalent to BGGR Bayer pattern

COLOR_BayerGR2BGR_VNG

equivalent to GBRG Bayer pattern

COLOR_BayerRGGB2BGR_VNG COLOR_BayerGRBG2BGR_VNG COLOR_BayerBGGR2BGR_VNG COLOR_BayerGBRG2BGR_VNG COLOR_BayerRGGB2RGB_VNG COLOR_BayerGRBG2RGB_VNG COLOR_BayerBGGR2RGB_VNG COLOR_BayerGBRG2RGB_VNG COLOR_BayerBG2RGB_VNG

equivalent to RGGB Bayer pattern

COLOR_BayerGB2RGB_VNG

equivalent to GRBG Bayer pattern

COLOR_BayerRG2RGB_VNG

equivalent to BGGR Bayer pattern

COLOR_BayerGR2RGB_VNG

equivalent to GBRG Bayer pattern

COLOR_BayerBG2BGR_EA

Edge-Aware Demosaicing.

equivalent to RGGB Bayer pattern

COLOR_BayerGB2BGR_EA

equivalent to GRBG Bayer pattern

COLOR_BayerRG2BGR_EA

equivalent to BGGR Bayer pattern

COLOR_BayerGR2BGR_EA

equivalent to GBRG Bayer pattern

COLOR_BayerRGGB2BGR_EA COLOR_BayerGRBG2BGR_EA COLOR_BayerBGGR2BGR_EA COLOR_BayerGBRG2BGR_EA COLOR_BayerRGGB2RGB_EA COLOR_BayerGRBG2RGB_EA COLOR_BayerBGGR2RGB_EA COLOR_BayerGBRG2RGB_EA COLOR_BayerBG2RGB_EA

equivalent to RGGB Bayer pattern

COLOR_BayerGB2RGB_EA

equivalent to GRBG Bayer pattern

COLOR_BayerRG2RGB_EA

equivalent to BGGR Bayer pattern

COLOR_BayerGR2RGB_EA

equivalent to GBRG Bayer pattern

COLOR_BayerBG2BGRA

Demosaicing with alpha channel.

equivalent to RGGB Bayer pattern

COLOR_BayerGB2BGRA

equivalent to GRBG Bayer pattern

COLOR_BayerRG2BGRA

equivalent to BGGR Bayer pattern

COLOR_BayerGR2BGRA

equivalent to GBRG Bayer pattern

COLOR_BayerRGGB2BGRA COLOR_BayerGRBG2BGRA COLOR_BayerBGGR2BGRA COLOR_BayerGBRG2BGRA COLOR_BayerRGGB2RGBA COLOR_BayerGRBG2RGBA COLOR_BayerBGGR2RGBA COLOR_BayerGBRG2RGBA COLOR_BayerBG2RGBA

equivalent to RGGB Bayer pattern

COLOR_BayerGB2RGBA

equivalent to GRBG Bayer pattern

COLOR_BayerRG2RGBA

equivalent to BGGR Bayer pattern

COLOR_BayerGR2RGBA

equivalent to GBRG Bayer pattern

COLOR_COLORCVT_MAX

Function Documentation

◆ cvtColor()

#include < opencv2/imgproc.hpp >

Converts an image from one color space to another.

The function converts an input image from one color space to another. In case of a transformation to-from RGB color space, the order of the channels should be specified explicitly (RGB or BGR). Note that the default color format in OpenCV is often referred to as RGB but it is actually BGR (the bytes are reversed). So the first byte in a standard (24-bit) color image will be an 8-bit Blue component, the second byte will be Green, and the third byte will be Red. The fourth, fifth, and sixth bytes would then be the second pixel (Blue, then Green, then Red), and so on.

The conventional ranges for R, G, and B channel values are:

• 0 to 255 for CV_8U images
• 0 to 65535 for CV_16U images
• 0 to 1 for CV_32F images

In case of linear transformations, the range does not matter. But in case of a non-linear transformation, an input RGB image should be normalized to the proper value range to get the correct results, for example, for RGB \(\rightarrow\) L*u*v* transformation. For example, if you have a 32-bit floating-point image directly converted from an 8-bit image without any scaling, then it will have the 0..255 value range instead of 0..1 assumed by the function. So, before calling cvtColor , you need first to scale the image down:

img *= 1./255;
cvtColor (img, img, COLOR_BGR2Luv );

If you use cvtColor with 8-bit images, the conversion will have some information lost. For many applications, this will not be noticeable but it is recommended to use 32-bit images in applications that need the full range of colors or that convert an image before an operation and then convert back.

If conversion adds the alpha channel, its value will set to the maximum of corresponding channel range: 255 for CV_8U, 65535 for CV_16U, 1 for CV_32F.

Parameters

srcinput image: 8-bit unsigned, 16-bit unsigned ( CV_16UC... ), or single-precision floating-point. dstoutput image of the same size and depth as src. codecolor space conversion code (see ColorConversionCodes ). dstCnnumber of channels in the destination image; if the parameter is 0, the number of the channels is derived automatically from src and code.

See also

Color conversions

Examples:

samples/cpp/camshiftdemo.cpp , samples/cpp/edge.cpp , samples/cpp/facedetect.cpp , samples/cpp/ffilldemo.cpp , samples/cpp/lkdemo.cpp , samples/cpp/train_HOG.cpp , samples/cpp/tutorial_code/ImgTrans/houghcircles.cpp , samples/cpp/tutorial_code/ImgTrans/houghlines.cpp , samples/cpp/tutorial_code/ImgTrans/Sobel_Demo.cpp , samples/cpp/tutorial_code/ml/introduction_to_pca/introduction_to_pca.cpp , samples/cpp/watershed.cpp , samples/dnn/colorization.cpp , samples/dnn/text_detection.cpp , and samples/tapi/hog.cpp .

Python:
	cv.cvtColorTwoPlane(	src1, src2, code[, dst]	) ->	dst

#include < opencv2/imgproc.hpp >

Converts an image from one color space to another where the source image is stored in two planes.

This function only supports YUV420 to RGB conversion as of now.

Parameters

src18-bit image ( CV_8U ) of the Y plane. src2image containing interleaved U/V plane. dstoutput image. codeSpecifies the type of conversion. It can take any of the following values:

• COLOR_YUV2BGR_NV12
• COLOR_YUV2RGB_NV12
• COLOR_YUV2BGRA_NV12
• COLOR_YUV2RGBA_NV12
• COLOR_YUV2BGR_NV21
• COLOR_YUV2RGB_NV21
• COLOR_YUV2BGRA_NV21
• COLOR_YUV2RGBA_NV21
srcinput image: 8-bit unsigned or 16-bit unsigned. dstoutput image of the same size and depth as src. codeColor space conversion code (see the description below). dstCnnumber of channels in the destination image; if the parameter is 0, the number of the channels is derived automatically from src and code.

The function can do the following transformations:

• Demosaicing using bilinear interpolation

  COLOR_BayerBG2BGR , COLOR_BayerGB2BGR , COLOR_BayerRG2BGR , COLOR_BayerGR2BGR

  COLOR_BayerBG2GRAY , COLOR_BayerGB2GRAY , COLOR_BayerRG2GRAY , COLOR_BayerGR2GRAY

• Demosaicing using Variable Number of Gradients.

  COLOR_BayerBG2BGR_VNG , COLOR_BayerGB2BGR_VNG , COLOR_BayerRG2BGR_VNG , COLOR_BayerGR2BGR_VNG

• Edge-Aware Demosaicing.

  COLOR_BayerBG2BGR_EA , COLOR_BayerGB2BGR_EA , COLOR_BayerRG2BGR_EA , COLOR_BayerGR2BGR_EA

• Demosaicing with alpha channel

  COLOR_BayerBG2BGRA , COLOR_BayerGB2BGRA , COLOR_BayerRG2BGRA , COLOR_BayerGR2BGRA

  See also

  cvtColor