Open Source Computer Vision Library
https://opencv.org/
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113 lines
4.2 KiB
113 lines
4.2 KiB
/*M/////////////////////////////////////////////////////////////////////////////////////// |
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// |
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// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING. |
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// |
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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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// |
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// |
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// License Agreement |
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// For Open Source Computer Vision Library |
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// |
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// Copyright (C) 2000-2008, Intel Corporation, all rights reserved. |
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// Copyright (C) 2008-2012, Willow Garage Inc., all rights reserved. |
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// Third party copyrights are property of their respective owners. |
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// |
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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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// |
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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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// |
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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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// |
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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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// |
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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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// |
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//M*/ |
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#include <precomp.hpp> |
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cv::SCascade::Channels::Channels(int shr) : shrinkage(shr) {} |
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void cv::SCascade::Channels::appendHogBins(const cv::Mat& gray, std::vector<cv::Mat>& integrals, int bins) const |
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{ |
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CV_Assert(gray.type() == CV_8UC1); |
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int h = gray.rows; |
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int w = gray.cols; |
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CV_Assert(!(w % shrinkage) && !(h % shrinkage)); |
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cv::Mat df_dx, df_dy, mag, angle; |
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cv::Sobel(gray, df_dx, CV_32F, 1, 0); |
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cv::Sobel(gray, df_dy, CV_32F, 0, 1); |
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cv::cartToPolar(df_dx, df_dy, mag, angle, true); |
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mag *= (1.f / (8 * sqrt(2.f))); |
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cv::Mat nmag; |
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mag.convertTo(nmag, CV_8UC1); |
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angle *= bins/360.f; |
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std::vector<cv::Mat> hist; |
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for (int bin = 0; bin < bins; ++bin) |
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hist.push_back(cv::Mat::zeros(h, w, CV_8UC1)); |
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for (int y = 0; y < h; ++y) |
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{ |
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uchar* magnitude = nmag.ptr<uchar>(y); |
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float* ang = angle.ptr<float>(y); |
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for (int x = 0; x < w; ++x) |
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{ |
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hist[ (int)ang[x] ].ptr<uchar>(y)[x] = magnitude[x]; |
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} |
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} |
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for(int i = 0; i < bins; ++i) |
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{ |
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cv::Mat shrunk, sum; |
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cv::resize(hist[i], shrunk, cv::Size(), 1.0 / shrinkage, 1.0 / shrinkage, CV_INTER_AREA); |
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cv::integral(shrunk, sum, cv::noArray(), CV_32S); |
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integrals.push_back(sum); |
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} |
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cv::Mat shrMag; |
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cv::resize(nmag, shrMag, cv::Size(), 1.0 / shrinkage, 1.0 / shrinkage, CV_INTER_AREA); |
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cv::integral(shrMag, mag, cv::noArray(), CV_32S); |
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integrals.push_back(mag); |
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} |
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void cv::SCascade::Channels::appendLuvBins(const cv::Mat& frame, std::vector<cv::Mat>& integrals) const |
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{ |
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CV_Assert(frame.type() == CV_8UC3); |
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CV_Assert(!(frame.cols % shrinkage) && !(frame.rows % shrinkage)); |
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cv::Mat luv, shrunk; |
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cv::cvtColor(frame, luv, CV_BGR2Luv); |
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cv::resize(luv, shrunk, cv::Size(), 1.0 / shrinkage, 1.0 / shrinkage, CV_INTER_AREA); |
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std::vector<cv::Mat> splited; |
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split(shrunk, splited); |
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for (size_t i = 0; i < splited.size(); ++i) |
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{ |
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cv::Mat sum; |
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cv::integral(splited[i], sum, cv::noArray(), CV_32S); |
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integrals.push_back(sum); |
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} |
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} |