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aac69ac846
Update examples to catch up with recent changes and ensure they both compile without errors (using GCC 5).
52 lines
1.5 KiB
C++
52 lines
1.5 KiB
C++
/*
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Copyright 2005-2007 Adobe Systems Incorporated
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Use, modification and distribution are subject to the Boost Software License,
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Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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http://www.boost.org/LICENSE_1_0.txt).
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See http://opensource.adobe.com/gil for most recent version including documentation.
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*/
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/*************************************************************************************************/
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/// \file
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/// \brief Example file to demonstrate a way to compute histogram
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/// \author Lubomir Bourdev and Hailin Jin
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/// \date February 27, 2007
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#include <boost/gil.hpp>
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#include <boost/gil/extension/io/jpeg.hpp>
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#include <algorithm>
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#include <fstream>
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using namespace boost::gil;
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template <typename GrayView, typename R>
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void gray_image_hist(const GrayView& img_view, R& hist) {
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// for_each_pixel(img_view,++lambda::var(hist)[lambda::_1]);
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for (typename GrayView::iterator it=img_view.begin(); it!=img_view.end(); ++it)
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++hist[*it];
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}
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template <typename V, typename R>
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void get_hist(const V& img_view, R& hist) {
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gray_image_hist(color_converted_view<gray8_pixel_t>(img_view), hist);
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}
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int main() {
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rgb8_image_t img;
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read_image("test.jpg", img, jpeg_tag());
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int histogram[256];
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std::fill(histogram,histogram + 256, 0);
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get_hist(const_view(img), histogram);
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std::fstream histo_file("out-histogram.txt", std::ios::out);
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for(std::size_t ii = 0; ii < 256; ++ii)
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histo_file << histogram[ii] << std::endl;
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histo_file.close();
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return 0;
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}
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