44 lines
1.8 KiB
C++
44 lines
1.8 KiB
C++
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//
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// Copyright 2019 Miral Shah <miralshah2211@gmail.com>
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//
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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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//
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#include <boost/gil.hpp>
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#include <boost/gil/extension/io/png.hpp>
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#include <iostream>
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using namespace boost::gil;
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// Demonstrates Adaptive Thresholding
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// threshold_adaptive works following either the mean or the gaussian method, and accepts also a direction
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// The direction indicates whether the pixels are assigned the max value when their values are greater
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// than the threshold (regular), or when they are less than the threshold (inverse)
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// threshold_adaptive is defined in include/boost/gil/image_processing/threshold.hpp
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// See also:
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// threshold.cpp - Simple thresholding
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int main()
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{
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gray8_image_t img;
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read_image("test_adaptive.png", img, png_tag{});
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gray8_image_t img_out(img.dimensions());
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boost::gil::threshold_adaptive(const_view(img), view(img_out), 11, threshold_adaptive_method::mean, threshold_direction::regular, 2);
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write_view("out-threshold-adaptive-mean.png", view(img_out), png_tag{});
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boost::gil::threshold_adaptive(const_view(img), view(img_out), 11, threshold_adaptive_method::mean, threshold_direction::inverse, 2);
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write_view("out-threshold-adaptive-mean-inv.png", view(img_out), png_tag{});
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boost::gil::threshold_adaptive(const_view(img), view(img_out), 7, threshold_adaptive_method::gaussian, threshold_direction::regular, 2);
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write_view("out-threshold-adaptive-gaussian.png", view(img_out), png_tag{});
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boost::gil::threshold_adaptive(const_view(img), view(img_out), 11, threshold_adaptive_method::gaussian, threshold_direction::inverse, 2);
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write_view("out-threshold-adaptive-gaussian-inv.png", view(img_out), png_tag{});
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return 0;
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}
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