Image Warping CUDA 加速的计算机视觉


函数

void  cv::cuda::buildWarpAffineMaps ( InputArray M, bool inverse, Size dsize, OutputArray xmap, OutputArray ymap, Stream &stream= Stream::Null ())
  Builds transformation maps for affine transformation. 更多...
 
void  cv::cuda::buildWarpPerspectiveMaps ( InputArray M, bool inverse, Size dsize, OutputArray xmap, OutputArray ymap, Stream &stream= Stream::Null ())
  Builds transformation maps for perspective transformation. 更多...
 
void  cv::cuda::pyrDown ( InputArray src, OutputArray dst, Stream &stream= Stream::Null ())
  Smoothes an image and downsamples it. 更多...
 
void  cv::cuda::pyrUp ( InputArray src, OutputArray dst, Stream &stream= Stream::Null ())
  Upsamples an image and then smoothes it. 更多...
 
void  cv::cuda::remap ( InputArray src, OutputArray dst, InputArray xmap, InputArray ymap, int interpolation, int borderMode= BORDER_CONSTANT , Scalar borderValue= Scalar (), Stream &stream= Stream::Null ())
  Applies a generic geometrical transformation to an image. 更多...
 
void  cv::cuda::resize ( InputArray src, OutputArray dst, Size dsize, double fx=0, double fy=0, int interpolation= INTER_LINEAR , Stream &stream= Stream::Null ())
  调整图像大小。 更多...
 
void  cv::cuda::rotate ( InputArray src, OutputArray dst, Size dsize, double angle, double xShift=0, double yShift=0, int interpolation= INTER_LINEAR , Stream &stream= Stream::Null ())
  Rotates an image around the origin (0,0) and then shifts it. 更多...
 
void  cv::cuda::warpAffine ( InputArray src, OutputArray dst, InputArray M, Size dsize, int flags= INTER_LINEAR , int borderMode= BORDER_CONSTANT , Scalar borderValue= Scalar (), Stream &stream= Stream::Null ())
  Applies an affine transformation to an image. 更多...
 
void  cv::cuda::warpPerspective ( InputArray src, OutputArray dst, InputArray M, Size dsize, int flags= INTER_LINEAR , int borderMode= BORDER_CONSTANT , Scalar borderValue= Scalar (), Stream &stream= Stream::Null ())
  Applies a perspective transformation to an image. 更多...
 

详细描述

函数文档编制

◆  buildWarpAffineMaps()

void cv::cuda::buildWarpAffineMaps ( InputArray   M ,
bool  inverse ,
Size   dsize ,
OutputArray   xmap ,
OutputArray   ymap ,
Stream stream = Stream::Null ()  
)

#include < opencv2/cudawarping.hpp >

Builds transformation maps for affine transformation.

Parameters
M 2x3 transformation matrix.
inverse Flag specifying that M is an inverse transformation ( dst=>src ).
dsize Size of the destination image.
xmap X values with CV_32FC1 type.
ymap Y values with CV_32FC1 type.
stream Stream for the asynchronous version.
另请参阅
cuda::warpAffine , cuda::remap

◆  buildWarpPerspectiveMaps()

void cv::cuda::buildWarpPerspectiveMaps ( InputArray   M ,
bool  inverse ,
Size   dsize ,
OutputArray   xmap ,
OutputArray   ymap ,
Stream stream = Stream::Null ()  
)

#include < opencv2/cudawarping.hpp >

Builds transformation maps for perspective transformation.

Parameters
M 3x3 transformation matrix.
inverse Flag specifying that M is an inverse transformation ( dst=>src ).
dsize Size of the destination image.
xmap X values with CV_32FC1 type.
ymap Y values with CV_32FC1 type.
stream Stream for the asynchronous version.
另请参阅
cuda::warpPerspective , cuda::remap

◆  pyrDown()

void cv::cuda::pyrDown ( InputArray   src ,
OutputArray   dst ,
Stream stream = Stream::Null ()  
)

#include < opencv2/cudawarping.hpp >

Smoothes an image and downsamples it.

Parameters
src Source image.
dst Destination image. Will have Size((src.cols+1)/2, (src.rows+1)/2) size and the same type as src .
stream Stream for the asynchronous version.
另请参阅
pyrDown

◆  pyrUp()

void cv::cuda::pyrUp ( InputArray   src ,
OutputArray   dst ,
Stream stream = Stream::Null ()  
)

#include < opencv2/cudawarping.hpp >

Upsamples an image and then smoothes it.

Parameters
src Source image.
dst Destination image. Will have Size(src.cols*2, src.rows*2) size and the same type as src .
stream Stream for the asynchronous version.

◆  remap()

void cv::cuda::remap ( InputArray   src ,
OutputArray   dst ,
InputArray   xmap ,
InputArray   ymap ,
int  interpolation ,
int  borderMode = BORDER_CONSTANT ,
Scalar   borderValue = Scalar () ,
Stream stream = Stream::Null ()  
)

#include < opencv2/cudawarping.hpp >

Applies a generic geometrical transformation to an image.

Parameters
src Source image.
dst Destination image with the size the same as xmap and the type the same as src .
xmap X values. Only CV_32FC1 type is supported.
ymap Y values. Only CV_32FC1 type is supported.
interpolation Interpolation method (see resize ). INTER_NEAREST , INTER_LINEAR and INTER_CUBIC are supported for now.
borderMode Pixel extrapolation method (see borderInterpolate ). BORDER_REFLECT101 , BORDER_REPLICATE , BORDER_CONSTANT , BORDER_REFLECT and BORDER_WRAP are supported for now.
borderValue Value used in case of a constant border. By default, it is 0.
stream Stream for the asynchronous version.

The function transforms the source image using the specified map:

\[\texttt{dst} (x,y) = \texttt{src} (xmap(x,y), ymap(x,y))\]

Values of pixels with non-integer coordinates are computed using the bilinear interpolation.

另请参阅
remap

◆  resize()

void cv::cuda::resize ( InputArray   src ,
OutputArray   dst ,
Size   dsize ,
double  fx = 0 ,
double  fy = 0 ,
int  interpolation = INTER_LINEAR ,
Stream stream = Stream::Null ()  
)

#include < opencv2/cudawarping.hpp >

调整图像大小。

Parameters
src Source image.
dst Destination image with the same type as src . The size is dsize (when it is non-zero) or the size is computed from src.size() , fx , and fy .
dsize Destination image size. If it is zero, it is computed as:

\[\texttt{dsize = Size(round(fx*src.cols), round(fy*src.rows))}\]

Either dsize or both fx and fy must be non-zero.
fx Scale factor along the horizontal axis. If it is zero, it is computed as:

\[\texttt{(double)dsize.width/src.cols}\]

fy Scale factor along the vertical axis. If it is zero, it is computed as:

\[\texttt{(double)dsize.height/src.rows}\]

interpolation Interpolation method. INTER_NEAREST , INTER_LINEAR and INTER_CUBIC are supported for now.
stream Stream for the asynchronous version.
另请参阅
resize

◆  rotate()

void cv::cuda::rotate ( InputArray   src ,
OutputArray   dst ,
Size   dsize ,
double  angle ,
double  xShift = 0 ,
double  yShift = 0 ,
int  interpolation = INTER_LINEAR ,
Stream stream = Stream::Null ()  
)

#include < opencv2/cudawarping.hpp >

Rotates an image around the origin (0,0) and then shifts it.

Parameters
src Source image. Supports 1, 3 or 4 channels images with CV_8U , CV_16U or CV_32F depth.
dst Destination image with the same type as src . The size is dsize .
dsize Size of the destination image.
angle Angle of rotation in degrees.
xShift Shift along the horizontal axis.
yShift Shift along the vertical axis.
interpolation Interpolation method. Only INTER_NEAREST , INTER_LINEAR , and INTER_CUBIC are supported.
stream Stream for the asynchronous version.
另请参阅
cuda::warpAffine

◆  warpAffine()

void cv::cuda::warpAffine ( InputArray   src ,
OutputArray   dst ,
InputArray   M ,
Size   dsize ,
int  flags = INTER_LINEAR ,
int  borderMode = BORDER_CONSTANT ,
Scalar   borderValue = Scalar () ,
Stream stream = Stream::Null ()  
)

#include < opencv2/cudawarping.hpp >

Applies an affine transformation to an image.

Parameters
src Source image. CV_8U , CV_16U , CV_32S , or CV_32F depth and 1, 3, or 4 channels are supported.
dst Destination image with the same type as src . The size is dsize .
M 2x3 transformation matrix.
dsize Size of the destination image.
flags Combination of interpolation methods (see resize) and the optional flag WARP_INVERSE_MAP specifying that M is an inverse transformation ( dst=>src ). Only INTER_NEAREST , INTER_LINEAR , and INTER_CUBIC interpolation methods are supported.
borderMode
borderValue
stream Stream for the asynchronous version.
另请参阅
warpAffine

◆  warpPerspective()

void cv::cuda::warpPerspective ( InputArray   src ,
OutputArray   dst ,
InputArray   M ,
Size   dsize ,
int  flags = INTER_LINEAR ,
int  borderMode = BORDER_CONSTANT ,
Scalar   borderValue = Scalar () ,
Stream stream = Stream::Null ()  
)

#include < opencv2/cudawarping.hpp >

Applies a perspective transformation to an image.

Parameters
src Source image. CV_8U , CV_16U , CV_32S , or CV_32F depth and 1, 3, or 4 channels are supported.
dst Destination image with the same type as src . The size is dsize .
M 3x3 transformation matrix.
dsize Size of the destination image.
flags Combination of interpolation methods (see resize ) and the optional flag WARP_INVERSE_MAP specifying that M is the inverse transformation ( dst => src ). Only INTER_NEAREST , INTER_LINEAR , and INTER_CUBIC interpolation methods are supported.
borderMode
borderValue
stream Stream for the asynchronous version.
另请参阅
warpPerspective