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- //
- // 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/kernel.hpp>
- #include <boost/gil/extension/numeric/convolve.hpp>
- // Example for convolve_rows() and convolve_cols() in the numeric extension
- int main() {
- using namespace boost::gil;
- rgb8_image_t img;
- read_image("test.jpg", img, jpeg_tag{});
- // Convolve the rows and the columns of the image with a fixed kernel
- rgb8_image_t convolved(img);
- // radius-1 Gaussian kernel, size 9
- float gaussian_1[]={0.00022923296f,0.0059770769f,0.060597949f,0.24173197f,0.38292751f,
- 0.24173197f,0.060597949f,0.0059770769f,0.00022923296f};
- /*
- // radius-2 Gaussian kernel, size 15
- float gaussian_2[]={
- 0.00048869418f,0.0024031631f,0.0092463447f,
- 0.027839607f,0.065602221f,0.12099898f,0.17469721f,
- 0.19744757f,
- 0.17469721f,0.12099898f,0.065602221f,0.027839607f,
- 0.0092463447f,0.0024031631f,0.00048869418f
- };
- //radius-3 Gaussian kernel, size 23
- float gaussian_3[]={
- 0.00016944126f,0.00053842377f,0.0015324751f,0.0039068931f,
- 0.0089216027f,0.018248675f,0.033434924f,0.054872241f,
- 0.080666073f,0.10622258f,0.12529446f,
- 0.13238440f,
- 0.12529446f,0.10622258f,0.080666073f,
- 0.054872241f,0.033434924f,0.018248675f,0.0089216027f,
- 0.0039068931f,0.0015324751f,0.00053842377f,0.00016944126f
- };
- //radius-4 Gaussian kernel, size 29
- float gaussian_4[]={
- 0.00022466264f,0.00052009715f,0.0011314391f,0.0023129794f,
- 0.0044433107f,0.0080211498f,0.013606987f,0.021691186f,
- 0.032493830f,0.045742013f,0.060509924f,0.075220309f,
- 0.087870099f,0.096459411f,0.099505201f,0.096459411f,0.087870099f,
- 0.075220309f,0.060509924f,0.045742013f,0.032493830f,
- 0.021691186f,0.013606987f,0.0080211498f,0.0044433107f,
- 0.0023129794f,0.0011314391f,0.00052009715f,0.00022466264f,
- };
- */
- kernel_1d_fixed<float,9> kernel(gaussian_1,4);
- convolve_rows_fixed<rgb32f_pixel_t>(const_view(convolved),kernel,view(convolved));
- convolve_cols_fixed<rgb32f_pixel_t>(const_view(convolved),kernel,view(convolved));
- write_view("out-convolution.jpg", view(convolved), jpeg_tag{});
- // This is how to use a resizable kernel
- kernel_1d<float> kernel2(gaussian_1,9,4);
- convolve_rows<rgb32f_pixel_t>(const_view(img),kernel2,view(img));
- convolve_cols<rgb32f_pixel_t>(const_view(img),kernel2,view(img));
- write_view("out-convolution2.jpg", view(img), jpeg_tag{});
- return 0;
- }
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