Graph API: Converting image from one color space to another

Collaboration diagram for Graph API: Converting image from one color space to another:

Functions
GMat	cv::gapi::BayerGR2RGB (const GMat &src_gr)
	Converts an image from BayerGR color space to RGB. More...
GMat	cv::gapi::BGR2Gray (const GMat &src)
	Converts an image from BGR color space to gray-scaled. More...
GMat	cv::gapi::BGR2LUV (const GMat &src)
	Converts an image from BGR color space to LUV color space. More...
GMat	cv::gapi::BGR2YUV (const GMat &src)
	Converts an image from BGR color space to YUV color space. More...
GMat	cv::gapi::LUV2BGR (const GMat &src)
	Converts an image from LUV color space to BGR color space. More...
GMat	cv::gapi::NV12toBGR (const GMat &src_y, const GMat &src_uv)
	Converts an image from NV12 (YUV420p) color space to BGR. More...
GMatP	cv::gapi::NV12toBGRp (const GMat &src_y, const GMat &src_uv)
	Converts an image from NV12 (YUV420p) color space to BGR. More...
GMat	cv::gapi::NV12toRGB (const GMat &src_y, const GMat &src_uv)
	Converts an image from NV12 (YUV420p) color space to RGB. More...
GMatP	cv::gapi::NV12toRGBp (const GMat &src_y, const GMat &src_uv)
	Converts an image from NV12 (YUV420p) color space to RGB. More...
GMat	cv::gapi::RGB2Gray (const GMat &src)
	Converts an image from RGB color space to gray-scaled. More...
GMat	cv::gapi::RGB2Gray (const GMat &src, float rY, float gY, float bY)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Resulting gray color value computed as \[\texttt{dst} (I)= \texttt{rY} * \texttt{src}(I).R + \texttt{gY} * \texttt{src}(I).G + \texttt{bY} * \texttt{src}(I).B \] . More...
GMat	cv::gapi::RGB2HSV (const GMat &src)
	Converts an image from RGB color space to HSV. More...
GMat	cv::gapi::RGB2Lab (const GMat &src)
	Converts an image from RGB color space to Lab color space. More...
GMat	cv::gapi::RGB2YUV (const GMat &src)
	Converts an image from RGB color space to YUV color space. More...
GMat	cv::gapi::RGB2YUV422 (const GMat &src)
	Converts an image from RGB color space to YUV422. More...
GMat	cv::gapi::YUV2BGR (const GMat &src)
	Converts an image from YUV color space to BGR color space. More...
GMat	cv::gapi::YUV2RGB (const GMat &src)
	Converts an image from YUV color space to RGB. More...

Detailed Description

Function Documentation

BayerGR2RGB()

GMat cv::gapi::BayerGR2RGB

(

const GMat &

src_gr

)

#include <opencv2/gapi/imgproc.hpp>

Converts an image from BayerGR color space to RGB.

The function converts an input image from BayerGR color space to RGB. The conventional ranges for G, R, and B channel values are 0 to 255.

Output image must be 8-bit unsigned 3-channel image CV_8UC3.

Note

Function textual ID is "org.opencv.imgproc.colorconvert.bayergr2rgb"

Parameters

src_gr

input image: 8-bit unsigned 1-channel image CV_8UC1.

See also

YUV2BGR, NV12toRGB

Referenced by cv::gapi::imgproc::G_TYPED_KERNEL().

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BGR2Gray()

GMat cv::gapi::BGR2Gray

(

const GMat &

src

)

#include <opencv2/gapi/imgproc.hpp>

Converts an image from BGR color space to gray-scaled.

The conventional ranges for B, G, and R channel values are 0 to 255. Resulting gray color value computed as

\[\texttt{dst} (I)= \texttt{0.114} * \texttt{src}(I).B + \texttt{0.587} * \texttt{src}(I).G + \texttt{0.299} * \texttt{src}(I).R \]

Note

Function textual ID is "org.opencv.imgproc.colorconvert.bgr2gray"

Parameters

src	input image: 8-bit unsigned 3-channel image CV_8UC1.

See also

BGR2LUV

Referenced by cv::gapi::imgproc::G_TYPED_KERNEL().

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BGR2LUV()

GMat cv::gapi::BGR2LUV

(

const GMat &

src

)

#include <opencv2/gapi/imgproc.hpp>

Converts an image from BGR color space to LUV color space.

The function converts an input image from BGR color space to LUV. The conventional ranges for B, G, and R channel values are 0 to 255.

Output image must be 8-bit unsigned 3-channel image CV_8UC3.

Note

Function textual ID is "org.opencv.imgproc.colorconvert.bgr2luv"

Parameters

src	input image: 8-bit unsigned 3-channel image CV_8UC3.

See also

RGB2Lab, RGB2LUV

Referenced by cv::gapi::imgproc::G_TYPED_KERNEL().

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BGR2YUV()

GMat cv::gapi::BGR2YUV

(

const GMat &

src

)

#include <opencv2/gapi/imgproc.hpp>

Converts an image from BGR color space to YUV color space.

The function converts an input image from BGR color space to YUV. The conventional ranges for B, G, and R channel values are 0 to 255.

Output image must be 8-bit unsigned 3-channel image CV_8UC3.

Note

Function textual ID is "org.opencv.imgproc.colorconvert.bgr2yuv"

Parameters

src	input image: 8-bit unsigned 3-channel image CV_8UC3.

See also

YUV2BGR

Referenced by cv::gapi::imgproc::G_TYPED_KERNEL().

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LUV2BGR()

GMat cv::gapi::LUV2BGR

(

const GMat &

src

)

#include <opencv2/gapi/imgproc.hpp>

Converts an image from LUV color space to BGR color space.

The function converts an input image from LUV color space to BGR. The conventional ranges for B, G, and R channel values are 0 to 255.

Output image must be 8-bit unsigned 3-channel image CV_8UC3.

Note

Function textual ID is "org.opencv.imgproc.colorconvert.luv2bgr"

Parameters

src	input image: 8-bit unsigned 3-channel image CV_8UC3.

See also

BGR2LUV

Referenced by cv::gapi::imgproc::G_TYPED_KERNEL().

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NV12toBGR()

GMat cv::gapi::NV12toBGR	(	const GMat &	src_y,
		const GMat &	src_uv
	)

#include <opencv2/gapi/imgproc.hpp>

Converts an image from NV12 (YUV420p) color space to BGR.

The function converts an input image from NV12 color space to RGB. The conventional ranges for Y, U, and V channel values are 0 to 255.

Output image must be 8-bit unsigned 3-channel image CV_8UC3.

Note

Function textual ID is "org.opencv.imgproc.colorconvert.nv12tobgr"

Parameters

src_y	input image: 8-bit unsigned 1-channel image CV_8UC1.
src_uv	input image: 8-bit unsigned 2-channel image CV_8UC2.

See also

YUV2BGR, NV12toRGB

Referenced by cv::gapi::imgproc::G_TYPED_KERNEL().

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NV12toBGRp()

GMatP cv::gapi::NV12toBGRp	(	const GMat &	src_y,
		const GMat &	src_uv
	)

#include <opencv2/gapi/imgproc.hpp>

Converts an image from NV12 (YUV420p) color space to BGR.

The function converts an input image from NV12 color space to BGR. The conventional ranges for Y, U, and V channel values are 0 to 255.

Output image must be 8-bit unsigned planar 3-channel image CV_8UC1. Planar image memory layout is three planes laying in the memory contiguously, so the image height should be plane_height*plane_number, image type is CV_8UC1.

Note

Function textual ID is "org.opencv.imgproc.colorconvert.nv12torgbp"

Parameters

src_y	input image: 8-bit unsigned 1-channel image CV_8UC1.
src_uv	input image: 8-bit unsigned 2-channel image CV_8UC2.

See also

YUV2RGB, NV12toRGBp, NV12toBGR

Referenced by cv::gapi::imgproc::G_TYPED_KERNEL().

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NV12toRGB()

GMat cv::gapi::NV12toRGB	(	const GMat &	src_y,
		const GMat &	src_uv
	)

#include <opencv2/gapi/imgproc.hpp>

Converts an image from NV12 (YUV420p) color space to RGB.

The function converts an input image from NV12 color space to RGB. The conventional ranges for Y, U, and V channel values are 0 to 255.

Output image must be 8-bit unsigned 3-channel image CV_8UC3.

Note

Function textual ID is "org.opencv.imgproc.colorconvert.nv12torgb"

Parameters

src_y	input image: 8-bit unsigned 1-channel image CV_8UC1.
src_uv	input image: 8-bit unsigned 2-channel image CV_8UC2.

See also

YUV2RGB, NV12toBGR

Referenced by cv::gapi::imgproc::G_TYPED_KERNEL().

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NV12toRGBp()

GMatP cv::gapi::NV12toRGBp	(	const GMat &	src_y,
		const GMat &	src_uv
	)

#include <opencv2/gapi/imgproc.hpp>

Converts an image from NV12 (YUV420p) color space to RGB.

The function converts an input image from NV12 color space to RGB. The conventional ranges for Y, U, and V channel values are 0 to 255.

Output image must be 8-bit unsigned planar 3-channel image CV_8UC1. Planar image memory layout is three planes laying in the memory contiguously, so the image height should be plane_height*plane_number, image type is CV_8UC1.

Note

Function textual ID is "org.opencv.imgproc.colorconvert.nv12torgbp"

Parameters

src_y	input image: 8-bit unsigned 1-channel image CV_8UC1.
src_uv	input image: 8-bit unsigned 2-channel image CV_8UC2.

See also

YUV2RGB, NV12toBGRp, NV12toRGB

Referenced by cv::gapi::imgproc::G_TYPED_KERNEL().

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RGB2Gray() [1/2]

GMat cv::gapi::RGB2Gray

(

const GMat &

src

)

#include <opencv2/gapi/imgproc.hpp>

Converts an image from RGB color space to gray-scaled.

The conventional ranges for R, G, and B channel values are 0 to 255. Resulting gray color value computed as

\[\texttt{dst} (I)= \texttt{0.299} * \texttt{src}(I).R + \texttt{0.587} * \texttt{src}(I).G + \texttt{0.114} * \texttt{src}(I).B \]

Note

Function textual ID is "org.opencv.imgproc.colorconvert.rgb2gray"

Parameters

src	input image: 8-bit unsigned 3-channel image CV_8UC1.

See also

RGB2YUV

Referenced by cv::gapi::imgproc::G_TYPED_KERNEL().

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RGB2Gray() [2/2]

GMat cv::gapi::RGB2Gray	(	const GMat &	src,
		float	rY,
		float	gY,
		float	bY
	)

#include <opencv2/gapi/imgproc.hpp>

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Resulting gray color value computed as

\[\texttt{dst} (I)= \texttt{rY} * \texttt{src}(I).R + \texttt{gY} * \texttt{src}(I).G + \texttt{bY} * \texttt{src}(I).B \]

.

Note

Function textual ID is "org.opencv.imgproc.colorconvert.rgb2graycustom"

Parameters

src	input image: 8-bit unsigned 3-channel image CV_8UC1.
rY	float multiplier for R channel.
gY	float multiplier for G channel.
bY	float multiplier for B channel.

See also

RGB2YUV

RGB2HSV()

GMat cv::gapi::RGB2HSV

(

const GMat &

src

)

#include <opencv2/gapi/imgproc.hpp>

Converts an image from RGB color space to HSV.

The function converts an input image from RGB color space to HSV. The conventional ranges for R, G, and B channel values are 0 to 255.

Output image must be 8-bit unsigned 3-channel image CV_8UC3.

Note

Function textual ID is "org.opencv.imgproc.colorconvert.rgb2hsv"

Parameters

src	input image: 8-bit unsigned 3-channel image CV_8UC3.

See also

YUV2BGR, NV12toRGB

Referenced by cv::gapi::imgproc::G_TYPED_KERNEL().

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RGB2Lab()

GMat cv::gapi::RGB2Lab

(

const GMat &

src

)

#include <opencv2/gapi/imgproc.hpp>

Converts an image from RGB color space to Lab color space.

The function converts an input image from BGR color space to Lab. The conventional ranges for R, G, and B channel values are 0 to 255.

Output image must be 8-bit unsigned 3-channel image CV_8UC1.

Note

Function textual ID is "org.opencv.imgproc.colorconvert.rgb2lab"

Parameters

src	input image: 8-bit unsigned 3-channel image CV_8UC1.

See also

RGB2YUV, RGB2LUV

Referenced by cv::gapi::imgproc::G_TYPED_KERNEL().

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RGB2YUV()

GMat cv::gapi::RGB2YUV

(

const GMat &

src

)

#include <opencv2/gapi/imgproc.hpp>

Converts an image from RGB color space to YUV color space.

The function converts an input image from RGB color space to YUV. The conventional ranges for R, G, and B channel values are 0 to 255.

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, like here, at RGB \(\rightarrow\) Y*u*v* transformation. Output image must be 8-bit unsigned 3-channel image CV_8UC3.

Note

Function textual ID is "org.opencv.imgproc.colorconvert.rgb2yuv"

Parameters

src	input image: 8-bit unsigned 3-channel image CV_8UC3.

See also

YUV2RGB, RGB2Lab

Referenced by cv::gapi::imgproc::G_TYPED_KERNEL().

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RGB2YUV422()

GMat cv::gapi::RGB2YUV422

(

const GMat &

src

)

#include <opencv2/gapi/imgproc.hpp>

Converts an image from RGB color space to YUV422.

The function converts an input image from RGB color space to YUV422. The conventional ranges for R, G, and B channel values are 0 to 255.

Output image must be 8-bit unsigned 2-channel image CV_8UC2.

Note

Function textual ID is "org.opencv.imgproc.colorconvert.rgb2yuv422"

Parameters

src	input image: 8-bit unsigned 3-channel image CV_8UC3.

See also

YUV2BGR, NV12toRGB

Referenced by cv::gapi::imgproc::G_TYPED_KERNEL().

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YUV2BGR()

GMat cv::gapi::YUV2BGR

(

const GMat &

src

)

#include <opencv2/gapi/imgproc.hpp>

Converts an image from YUV color space to BGR color space.

The function converts an input image from YUV color space to BGR. The conventional ranges for B, G, and R channel values are 0 to 255.

Output image must be 8-bit unsigned 3-channel image CV_8UC3.

Note

Function textual ID is "org.opencv.imgproc.colorconvert.yuv2bgr"

Parameters

src	input image: 8-bit unsigned 3-channel image CV_8UC3.

See also

BGR2YUV

Referenced by cv::gapi::imgproc::G_TYPED_KERNEL().

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YUV2RGB()

GMat cv::gapi::YUV2RGB

(

const GMat &

src

)

#include <opencv2/gapi/imgproc.hpp>

Converts an image from YUV color space to RGB.

The function converts an input image from YUV color space to RGB. The conventional ranges for Y, U, and V channel values are 0 to 255.

Output image must be 8-bit unsigned 3-channel image CV_8UC3.

Note

Function textual ID is "org.opencv.imgproc.colorconvert.yuv2rgb"

Parameters

src	input image: 8-bit unsigned 3-channel image CV_8UC3.

See also

RGB2Lab, RGB2YUV

Referenced by cv::gapi::imgproc::G_TYPED_KERNEL().

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