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/*M///////////////////////////////////////////////////////////////////////////////////////
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// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
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// By downloading, copying, installing or using the software you agree to this license.
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// If you do not agree to this license, do not download, install,
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// copy or use the software.
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// For Open Source Computer Vision Library
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// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
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// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
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// Third party copyrights are property of their respective owners.
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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// * Redistribution's of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistribution's in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * The name of the copyright holders may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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// This software is provided by the copyright holders and contributors "as is" and
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// any express or implied warranties, including, but not limited to, the implied
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// warranties of merchantability and fitness for a particular purpose are disclaimed.
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// In no event shall the Intel Corporation or contributors be liable for any direct,
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// indirect, incidental, special, exemplary, or consequential damages
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// (including, but not limited to, procurement of substitute goods or services;
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// loss of use, data, or profits; or business interruption) however caused
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// and on any theory of liability, whether in contract, strict liability,
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// or tort (including negligence or otherwise) arising in any way out of
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// the use of this software, even if advised of the possibility of such damage.
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#include "opencv2/opencv_modules.hpp"
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#ifndef HAVE_OPENCV_CUDEV
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#error "opencv_cudev is required"
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#include "opencv2/cudaarithm.hpp"
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#include "opencv2/cudev.hpp"
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#include "opencv2/core/private.cuda.hpp"
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using namespace cv::cuda;
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using namespace cv::cudev;
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template <typename ScalarDepth> struct TransformPolicy : DefaultTransformPolicy
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template <> struct TransformPolicy<double> : DefaultTransformPolicy
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void thresholdImpl(const GpuMat& src, GpuMat& dst, double thresh, double maxVal, int type, Stream& stream)
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const T thresh_ = static_cast<T>(thresh);
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const T maxVal_ = static_cast<T>(maxVal);
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gridTransformUnary_< TransformPolicy<T> >(globPtr<T>(src), globPtr<T>(dst), thresh_binary_func(thresh_, maxVal_), stream);
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gridTransformUnary_< TransformPolicy<T> >(globPtr<T>(src), globPtr<T>(dst), thresh_binary_inv_func(thresh_, maxVal_), stream);
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gridTransformUnary_< TransformPolicy<T> >(globPtr<T>(src), globPtr<T>(dst), thresh_trunc_func(thresh_), stream);
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gridTransformUnary_< TransformPolicy<T> >(globPtr<T>(src), globPtr<T>(dst), thresh_to_zero_func(thresh_), stream);
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gridTransformUnary_< TransformPolicy<T> >(globPtr<T>(src), globPtr<T>(dst), thresh_to_zero_inv_func(thresh_), stream);
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double cv::cuda::threshold(InputArray _src, OutputArray _dst, double thresh, double maxVal, int type, Stream& stream)
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GpuMat src = getInputMat(_src, stream);
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const int depth = src.depth();
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CV_Assert( src.channels() == 1 && depth <= CV_64F );
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CV_Assert( type <= 4 /*THRESH_TOZERO_INV*/ );
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GpuMat dst = getOutputMat(_dst, src.size(), src.type(), stream);
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if (depth == CV_32F && type == 2 /*THRESH_TRUNC*/)
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NppStreamHandler h(StreamAccessor::getStream(stream));
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sz.height = src.rows;
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nppSafeCall( nppiThreshold_32f_C1R(src.ptr<Npp32f>(), static_cast<int>(src.step),
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dst.ptr<Npp32f>(), static_cast<int>(dst.step), sz, static_cast<Npp32f>(thresh), NPP_CMP_GREATER) );
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CV_CUDEV_SAFE_CALL( cudaDeviceSynchronize() );
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typedef void (*func_t)(const GpuMat& src, GpuMat& dst, double thresh, double maxVal, int type, Stream& stream);
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static const func_t funcs[] =
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thresholdImpl<uchar>,
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thresholdImpl<schar>,
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thresholdImpl<ushort>,
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thresholdImpl<short>,
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thresholdImpl<float>,
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thresholdImpl<double>
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if (depth != CV_32F && depth != CV_64F)
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thresh = cvFloor(thresh);
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maxVal = cvRound(maxVal);
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funcs[depth](src, dst, thresh, maxVal, type, stream);
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syncOutput(dst, _dst, stream);