OpenCV  4.5.0-pre
Open Source Computer Vision
Functions
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. 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. More...
 
GMat cv::gapi::BGR2Gray (const GMat &src)
 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

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

. 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. 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. More...
 
GMatP cv::gapi::NV12toBGRp (const GMat &src_y, const GMat &src_uv)
 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. More...
 
GMat cv::gapi::NV12toGray (const GMat &src_y, const GMat &src_uv)
 Converts an image from NV12 (YUV420p) color space to gray-scaled. The function converts an input image from NV12 color space to gray-scaled. The conventional ranges for Y, U, and V channel values are 0 to 255. More...
 
GMat cv::gapi::NV12toRGB (const GMat &src_y, const GMat &src_uv)
 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. More...
 
GMatP cv::gapi::NV12toRGBp (const GMat &src_y, const GMat &src_uv)
 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. More...
 
GMat cv::gapi::RGB2Gray (const GMat &src)
 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

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

. More...

 
GMat cv::gapi::RGB2Gray (const GMat &src, float rY, float gY, float bY)
 
GMat cv::gapi::RGB2HSV (const GMat &src)
 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. 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. 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. 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. 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. 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_grinput image: 8-bit unsigned 1-channel image CV_8UC1.
See also
YUV2BGR, NV12toRGB

◆ 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
srcinput image: 8-bit unsigned 3-channel image CV_8UC1.
See also
BGR2LUV

◆ 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
srcinput image: 8-bit unsigned 3-channel image CV_8UC3.
See also
RGB2Lab, RGB2LUV

◆ 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
srcinput image: 8-bit unsigned 3-channel image CV_8UC3.
See also
YUV2BGR

◆ 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
srcinput image: 8-bit unsigned 3-channel image CV_8UC3.
See also
BGR2LUV

◆ 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_yinput image: 8-bit unsigned 1-channel image CV_8UC1.
src_uvinput image: 8-bit unsigned 2-channel image CV_8UC2.
See also
YUV2BGR, NV12toRGB

◆ 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_yinput image: 8-bit unsigned 1-channel image CV_8UC1.
src_uvinput image: 8-bit unsigned 2-channel image CV_8UC2.
See also
YUV2RGB, NV12toRGBp, NV12toBGR

◆ NV12toGray()

GMat cv::gapi::NV12toGray ( const GMat src_y,
const GMat src_uv 
)

#include <opencv2/gapi/imgproc.hpp>

Converts an image from NV12 (YUV420p) color space to gray-scaled. The function converts an input image from NV12 color space to gray-scaled. The conventional ranges for Y, U, and V channel values are 0 to 255.

Output image must be 8-bit unsigned 1-channel image CV_8UC1.

Note
Function textual ID is "org.opencv.imgproc.colorconvert.nv12togray"
Parameters
src_yinput image: 8-bit unsigned 1-channel image CV_8UC1.
src_uvinput image: 8-bit unsigned 2-channel image CV_8UC2.
See also
YUV2RGB, NV12toBGR

◆ 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_yinput image: 8-bit unsigned 1-channel image CV_8UC1.
src_uvinput image: 8-bit unsigned 2-channel image CV_8UC2.
See also
YUV2RGB, NV12toBGR

◆ 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_yinput image: 8-bit unsigned 1-channel image CV_8UC1.
src_uvinput image: 8-bit unsigned 2-channel image CV_8UC2.
See also
YUV2RGB, NV12toBGRp, NV12toRGB

◆ 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
srcinput image: 8-bit unsigned 3-channel image CV_8UC1.
See also
RGB2YUV

◆ 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
srcinput image: 8-bit unsigned 3-channel image CV_8UC1.
rYfloat multiplier for R channel.
gYfloat multiplier for G channel.
bYfloat 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
srcinput image: 8-bit unsigned 3-channel image CV_8UC3.
See also
YUV2BGR, NV12toRGB

◆ 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
srcinput image: 8-bit unsigned 3-channel image CV_8UC1.
See also
RGB2YUV, RGB2LUV

◆ 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
srcinput image: 8-bit unsigned 3-channel image CV_8UC3.
See also
YUV2RGB, RGB2Lab

◆ 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
srcinput image: 8-bit unsigned 3-channel image CV_8UC3.
See also
YUV2BGR, NV12toRGB

◆ 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
srcinput image: 8-bit unsigned 3-channel image CV_8UC3.
See also
BGR2YUV

◆ 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
srcinput image: 8-bit unsigned 3-channel image CV_8UC3.
See also
RGB2Lab, RGB2YUV