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Merge pull request #16768 from TolyaTalamanov:at/add-warp-affine

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G-API: Implement WarpAffine

* Add WarpAffine

* Ban BORDER_TRANSPARENT

* Fix doc
This commit is contained in:
Anatoliy Talamanov
2020-03-19 15:12:09 +03:00
committed by GitHub
parent 2160f9b20e
commit 8fe9674301
6 changed files with 87 additions and 0 deletions
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modules/gapi/include/opencv2/gapi/core.hpp
+33
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@@ -485,6 +485,14 @@ namespace core {
return (ddepth < 0 ? in : in.withDepth(ddepth));
}
};
G_TYPED_KERNEL(GWarpAffine, <GMat(GMat, const Mat&, Size, int, int, const cv::Scalar&)>, "org.opencv.core.warpAffine") {
static GMatDesc outMeta(GMatDesc in, const Mat&, Size dsize, int, int border_mode, const cv::Scalar&) {
GAPI_Assert(border_mode != cv::BORDER_TRANSPARENT &&
"cv::BORDER_TRANSPARENT mode isn't support in G-API");
return in.withType(in.depth, in.chan).withSize(dsize);
}
};
}
//! @addtogroup gapi_math
@@ -1653,6 +1661,31 @@ number of channels as src and the depth =ddepth.
*/
GAPI_EXPORTS GMat normalize(const GMat& src, double alpha, double beta,
int norm_type, int ddepth = -1);
/** @brief Applies an affine transformation to an image.
The function warpAffine transforms the source image using the specified matrix:
\f[\texttt{dst} (x,y) = \texttt{src} ( \texttt{M} _{11} x + \texttt{M} _{12} y + \texttt{M} _{13}, \texttt{M} _{21} x + \texttt{M} _{22} y + \texttt{M} _{23})\f]
when the flag #WARP_INVERSE_MAP is set. Otherwise, the transformation is first inverted
with #invertAffineTransform and then put in the formula above instead of M. The function cannot
operate in-place.
@param src input image.
@param M \f$2\times 3\f$ transformation matrix.
@param dsize size of the output image.
@param flags combination of interpolation methods (see #InterpolationFlags) and the optional
flag #WARP_INVERSE_MAP that means that M is the inverse transformation (
\f$\texttt{dst}\rightarrow\texttt{src}\f$ ).
@param borderMode pixel extrapolation method (see #BorderTypes);
borderMode=#BORDER_TRANSPARENT isn't supported
@param borderValue value used in case of a constant border; by default, it is 0.
@sa warpPerspective, resize, remap, getRectSubPix, transform
*/
GAPI_EXPORTS GMat warpAffine(const GMat& src, const Mat& M, const Size& dsize, int flags = cv::INTER_LINEAR,
int borderMode = cv::BORDER_CONSTANT, const Scalar& borderValue = Scalar());
//! @} gapi_transform
} //namespace gapi