1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
/*
Copyright 2005-2007 Adobe Systems Incorporated
Use, modification and distribution are subject to 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).
See http://opensource.adobe.com/gil for most recent version including documentation.
*/
/*************************************************************************************************/
/// \file
/// \brief Example file to demonstrate a way to compute histogram
/// \author Lubomir Bourdev and Hailin Jin
/// \date February 27, 2007
#include <algorithm>
#include <fstream>
#include <boost/gil/image.hpp>
#include <boost/gil/typedefs.hpp>
#include <boost/gil/color_convert.hpp>
#include <boost/gil/extension/io/jpeg_io.hpp>
using namespace boost::gil;
template <typename GrayView, typename R>
void gray_image_hist(const GrayView& img_view, R& hist) {
// for_each_pixel(img_view,++lambda::var(hist)[lambda::_1]);
for (typename GrayView::iterator it=img_view.begin(); it!=img_view.end(); ++it)
++hist[*it];
}
template <typename V, typename R>
void get_hist(const V& img_view, R& hist) {
gray_image_hist(color_converted_view<gray8_pixel_t>(img_view), hist);
}
int main() {
rgb8_image_t img;
jpeg_read_image("test.jpg",img);
int histogram[256];
std::fill(histogram,histogram+256,0);
get_hist(const_view(img),histogram);
std::fstream histo_file("out-histogram.txt",std::ios::out);
for(std::size_t ii=0;ii<256;++ii)
histo_file << histogram[ii] << std::endl;
histo_file.close();
return 0;
}
|
