Color space processing#
Detailed Description#
Enumerations#
enum cv::cuda::AlphaCompTypes {
cv::cuda::ALPHA_OVER,
cv::cuda::ALPHA_IN,
cv::cuda::ALPHA_OUT,
cv::cuda::ALPHA_ATOP,
cv::cuda::ALPHA_XOR,
cv::cuda::ALPHA_PLUS,
cv::cuda::ALPHA_OVER_PREMUL,
cv::cuda::ALPHA_IN_PREMUL,
cv::cuda::ALPHA_OUT_PREMUL,
cv::cuda::ALPHA_ATOP_PREMUL,
cv::cuda::ALPHA_XOR_PREMUL,
cv::cuda::ALPHA_PLUS_PREMUL,
cv::cuda::ALPHA_PREMUL
}
enum cv::cuda::DemosaicTypes {
cv::cuda::COLOR_BayerBG2BGR_MHT = 256,
cv::cuda::COLOR_BayerGB2BGR_MHT = 257,
cv::cuda::COLOR_BayerRG2BGR_MHT = 258,
cv::cuda::COLOR_BayerGR2BGR_MHT = 259,
cv::cuda::COLOR_BayerBG2RGB_MHT = COLOR_BayerRG2BGR_MHT,
cv::cuda::COLOR_BayerGB2RGB_MHT = COLOR_BayerGR2BGR_MHT,
cv::cuda::COLOR_BayerRG2RGB_MHT = COLOR_BayerBG2BGR_MHT,
cv::cuda::COLOR_BayerGR2RGB_MHT = COLOR_BayerGB2BGR_MHT,
cv::cuda::COLOR_BayerBG2GRAY_MHT = 260,
cv::cuda::COLOR_BayerGB2GRAY_MHT = 261,
cv::cuda::COLOR_BayerRG2GRAY_MHT = 262,
cv::cuda::COLOR_BayerGR2GRAY_MHT = 263
}Enumeration Type Documentation#
AlphaCompTypes#
#include <opencv2/cudaimgproc.hpp>
Enumerator:
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DemosaicTypes#
#include <opencv2/cudaimgproc.hpp>
Enumerator:
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Bayer Demosaicing (Malvar, He, and Cutler) |
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Function Documentation#
alphaComp()#
void cv::cuda::alphaComp(
InputArray img1,
InputArray img2,
OutputArray dst,
int alpha_op,
Stream & stream = Stream::Null() )
#include <opencv2/cudaimgproc.hpp>
Composites two images using alpha opacity values contained in each image.
Note
An example demonstrating the use of alphaComp can be found at opencv_source_code/samples/gpu/alpha_comp.cpp
Parameters
img1— First image. Supports CV_8UC4 , CV_16UC4 , CV_32SC4 and CV_32FC4 types.img2— Second image. Must have the same size and the same type as img1 .dst— Destination image.alpha_op— Flag specifying the alpha-blending operation:ALPHA_OVER
ALPHA_IN
ALPHA_OUT
ALPHA_ATOP
ALPHA_XOR
ALPHA_PLUS
ALPHA_OVER_PREMUL
ALPHA_IN_PREMUL
ALPHA_OUT_PREMUL
ALPHA_ATOP_PREMUL
ALPHA_XOR_PREMUL
ALPHA_PLUS_PREMUL
ALPHA_PREMUL
stream— Stream for the asynchronous version.
cvtColor()#
void cv::cuda::cvtColor(
InputArray src,
OutputArray dst,
int code,
int dcn = 0,
Stream & stream = Stream::Null() )
#include <opencv2/cudaimgproc.hpp>
Converts an image from one color space to another.
3-channel color spaces (like HSV, XYZ, and so on) can be stored in a 4-channel image for better performance.
See also
Parameters
src— Source image with CV_8U , CV_16U , or CV_32F depth and 1, 3, or 4 channels.dst— Destination image.code— Color space conversion code. For details, see cvtColor .dcn— Number of channels in the destination image. If the parameter is 0, the number of the channels is derived automatically from src and the code .stream— Stream for the asynchronous version.
demosaicing()#
void cv::cuda::demosaicing(
InputArray src,
OutputArray dst,
int code,
int dcn = -1,
Stream & stream = Stream::Null() )
#include <opencv2/cudaimgproc.hpp>
Converts an image from Bayer pattern to RGB or grayscale.
The function can do the following transformations:
Demosaicing using bilinear interpolation
COLOR_BayerBG2GRAY , COLOR_BayerGB2GRAY , COLOR_BayerRG2GRAY , COLOR_BayerGR2GRAY > - COLOR_BayerBG2BGR , COLOR_BayerGB2BGR , COLOR_BayerRG2BGR , COLOR_BayerGR2BGR
Demosaicing using Malvar-He-Cutler algorithm ([118])
COLOR_BayerBG2GRAY_MHT , COLOR_BayerGB2GRAY_MHT , COLOR_BayerRG2GRAY_MHT , > COLOR_BayerGR2GRAY_MHT > - COLOR_BayerBG2BGR_MHT , COLOR_BayerGB2BGR_MHT , COLOR_BayerRG2BGR_MHT , > COLOR_BayerGR2BGR_MHT
See also
Parameters
src— Source image (8-bit or 16-bit single channel).dst— Destination image.code— Color space conversion code (see the description below).dcn— Number of channels in the destination image. If the parameter is 0, the number of the channels is derived automatically from src and the code .stream— Stream for the asynchronous version.
gammaCorrection()#
void cv::cuda::gammaCorrection(
InputArray src,
OutputArray dst,
bool forward = true,
Stream & stream = Stream::Null() )
#include <opencv2/cudaimgproc.hpp>
Routines for correcting image color gamma.
Gamma correction is conformant to [151] [151] with =0.45.
For the forward transform, RGB values are normalised to fit in the range L=[0..1], then:
For L < 0.018
V = 4.5*L
For L >= 0.018
V = 1.099 * L^0.45 - 0.099
With V then being scaled back to [0..255].
Parameters
src— Source image (3- or 4-channel 8 bit).dst— Destination image.forward— true for forward gamma correction or false for inverse gamma correction.stream— Stream for the asynchronous version.
swapChannels()#
void cv::cuda::swapChannels(
InputOutputArray image,
const int[4] dstOrder,
Stream & stream = Stream::Null() )
#include <opencv2/cudaimgproc.hpp>
Exchanges the color channels of an image in-place.
The methods support arbitrary permutations of the original channels, including replication.
Parameters
image— Source image. Supports only CV_8UC4 type.dstOrder— Integer array describing how channel values are permutated. The n-th entry of the array contains the number of the channel that is stored in the n-th channel of the output image. E.g. Given an RGBA image, aDstOrder = [3,2,1,0] converts this to ABGR channel order.stream— Stream for the asynchronous version.