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gil/example/resize.cpp
Nicolas Herry 0b24f4cdbf Ensure all examples build without error (#628)
* Added all missing examples, dodgy Jamfile still
* Fixed attributions and Jamfile indent
* One readme per example: synopsis, build and exec reqs
* Cleaned up example/convolve2d.cpp
* Added example target to root Jamfile

Closes #436
2021-11-10 18:21:02 +01:00

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1.2 KiB
C++

//
// Copyright 2005-2007 Adobe Systems Incorporated
//
// Distributed under the Boost Software License, Version 1.0
// See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt
//
#include <boost/gil.hpp>
#include <boost/gil/extension/io/jpeg.hpp>
#include <boost/gil/extension/numeric/sampler.hpp>
#include <boost/gil/extension/numeric/resample.hpp>
// Demonstrates how to scale an image using bilinear sampling
// This example relies on the function resize_view(), available in include/boost/gil/extension/numeric/resample.hpp,
// to apply the resampling.
// This example demonstrates bilinear sampling; include/boost/gil/extension/numeric/sample.hpp also offers nearest-neighbour sampling.
int main()
{
namespace bg = boost::gil;
bg::rgb8_image_t img;
bg::read_image("test.jpg", img, bg::jpeg_tag{});
// test resize_view
// Scale the image to 100x100 pixels using bilinear resampling
bg::rgb8_image_t square100x100(100, 100);
bg::resize_view(bg::const_view(img), bg::view(square100x100), bg::bilinear_sampler{});
bg::write_view("out-resize.jpg", bg::const_view(square100x100), bg::jpeg_tag{});
return 0;
}