//! The scale associated with the first interval of the first octave
float initialScale;
//! mask parameter l_1
float l1;
//! mask parameter l_2
float l2;
//! mask parameter l_3
float l3;
//! mask parameter l_4
float l4;
//! The amount to scale the edge rejection mask
float edgeScale;
//! The initial sampling step in pixels.
int initialStep;
//! True, if generate 128-len descriptors, false - 64-len descriptors
bool extended;
//! max features = featuresRatio * img.size().area()
float featuresRatio;
};
\end{lstlisting}
In contrast to \hyperref[cv.class.SURF]{cv::SURF}\texttt{SURF\_GPU} works with float sources (with range [0..1]). It performs conversion after calculation of the integral by division result by 255. Please take it into consideration when change some parameters (like hessian threshold).
Current \texttt{SURF\_GPU} implementation supports the number of intervals in each octave in range [3..21].
See also: \hyperref[class.gpu.SURF]{cv::gpu::SURF\_GPU}.
\cvclass{gpu::SURF\_GPU}\label{class.gpu.SURF}
Class for extracting Speeded Up Robust Features from an image.
\begin{lstlisting}
...
...
@@ -62,7 +110,7 @@ The class \texttt{SURF\_GPU} can store results to GPU and CPU memory and provide
The class \texttt{SURF\_GPU} uses some buffers and provides access to it. All buffers can be safely released between function calls.
See also: \hyperref[cv.class.SURF]{cv::SURF}.
See also: \hyperref[cv.class.SURF]{cv::SURF}, \hyperref[class.gpu.SURFParams]{cv::gpu::SURFParams\_GPU}.
In contrast to \hyperref[cppfunc.gpu.BruteForceMatcher.radiusMatch]{cv::gpu::BruteForceMather\_GPU::radiusMatch} results are not sorted by distance increasing order.
This function works only on devices with Compute Capability $>=$ 1.1.
\textbf{Please note:} This function works only on devices with Compute Capability $>=$ 1.1.
Downloads \texttt{trainIdx}, \texttt{nMatches} and \texttt{distance} matrices obtained via \hyperref[cppfunc.gpu.BruteForceMatcher.radiusMatchSingle]{radiusMatch} to CPU vector with \hyperref[cv.class.DMatch]{cv::DMatch}. If \texttt{compactResult} is true \texttt{matches} vector will not contain matches for fully masked out query descriptors.
