first naive version

2026-07-29 15:23:05 +04:00 · 2012-08-13 17:44:23 +04:00
parent 941897aa3d
commit 3703722a72
3 changed files with 267 additions and 0 deletions
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+/*M///////////////////////////////////////////////////////////////////////////////////////
+//
+//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
+//
+//  By downloading, copying, installing or using the software you agree to this license.
+//  If you do not agree to this license, do not download, install,
+//  copy or use the software.
+//
+//
+//                           License Agreement
+//                For Open Source Computer Vision Library
+//
+// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
+// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
+// Third party copyrights are property of their respective owners.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+//   * Redistribution's of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//
+//   * Redistribution's in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//
+//   * The name of the copyright holders may not be used to endorse or promote products
+//     derived from this software without specific prior written permission.
+//
+// This software is provided by the copyright holders and contributors "as is" and
+// any express or implied warranties, including, but not limited to, the implied
+// warranties of merchantability and fitness for a particular purpose are disclaimed.
+// In no event shall the Intel Corporation or contributors be liable for any direct,
+// indirect, incidental, special, exemplary, or consequential damages
+// (including, but not limited to, procurement of substitute goods or services;
+// loss of use, data, or profits; or business interruption) however caused
+// and on any theory of liability, whether in contract, strict liability,
+// or tort (including negligence or otherwise) arising in any way out of
+// the use of this software, even if advised of the possibility of such damage.
+//
+//M*/
+
+#include "precomp.hpp"
+
+namespace cv { namespace gpu { namespace device
+{
+    namespace hough
+    {
+        void linesAccum_gpu(DevMem2Db src, PtrStep_<uint> accum, float theta, int numangle, int numrho, float irho);
+        int linesGetResult_gpu(DevMem2D_<uint> accum, float2* out, int* voices, int maxSize, float threshold, float theta, float rho, bool doSort);
+    }
+}}}
+
+void cv::gpu::HoughLinesTransform(const GpuMat& src, GpuMat& accum, float rho, float theta)
+{
+    using namespace cv::gpu::device;
+
+    CV_Assert(src.type() == CV_8UC1);
+
+    const int numangle = cvRound(CV_PI / theta);
+    const int numrho = cvRound(((src.cols + src.rows) * 2 + 1) / rho);
+    const float irho = 1.0f / rho;
+
+    accum.create(numangle + 2, numrho + 2, CV_32SC1);
+    accum.setTo(cv::Scalar::all(0));
+
+    hough::linesAccum_gpu(src, accum, theta, numangle, numrho, irho);
+}
+
+void cv::gpu::HoughLinesGet(const GpuMat& accum, GpuMat& lines, float rho, float theta, int threshold, bool doSort, int maxLines)
+{
+    using namespace cv::gpu::device;
+
+    CV_Assert(accum.type() == CV_32SC1);
+
+    lines.create(2, maxLines, CV_32FC2);
+    lines.cols = hough::linesGetResult_gpu(accum, lines.ptr<float2>(0), lines.ptr<int>(1), maxLines, threshold, theta, rho, doSort);
+}
+
+void cv::gpu::HoughLines(const GpuMat& src, GpuMat& lines, float rho, float theta, int threshold, bool doSort, int maxLines)
+{
+    cv::gpu::GpuMat accum;
+    HoughLines(src, lines, accum, rho, theta, threshold, doSort, maxLines);
+}
+
+void cv::gpu::HoughLines(const GpuMat& src, GpuMat& lines, GpuMat& accum, float rho, float theta, int threshold, bool doSort, int maxLines)
+{
+    HoughLinesTransform(src, accum, rho, theta);
+    HoughLinesGet(accum, lines, rho, theta, threshold, doSort, maxLines);
+}
+
+void cv::gpu::HoughLinesDownload(const GpuMat& d_lines, OutputArray h_lines_, OutputArray h_voices_)
+{
+    h_lines_.create(1, d_lines.cols, CV_32FC2);
+    cv::Mat h_lines = h_lines_.getMat();
+    d_lines.row(0).download(h_lines);
+
+    if (h_voices_.needed())
+    {
+        h_voices_.create(1, d_lines.cols, CV_32SC1);
+        cv::Mat h_voices = h_voices_.getMat();
+        cv::gpu::GpuMat d_voices(1, d_lines.cols, CV_32SC1, const_cast<int*>(d_lines.ptr<int>(1)));
+        d_voices.download(h_voices);
+    }
+}