WebSVN - OpenCV2-Cookbook - Diff - Rev 3 and 5 - /trunk/Chapter 03/colordetectorLab.cpp


/*------------------------------------------------------------------------------------------*\
   This file contains material supporting chapter 3 of the cookbook:  
   Computer Vision Programming using the OpenCV Library.
   by Robert Laganiere, Packt Publishing, 2011.

   This program is free software; permission is hereby granted to use, copy, modify,
   and distribute this source code, or portions thereof, for any purpose, without fee,
   subject to the restriction that the copyright notice may not be removed
   or altered from any source or altered source distribution.
   The software is released on an as-is basis and without any warranties of any kind.
   In particular, the software is not guaranteed to be fault-tolerant or free from failure.
   The author disclaims all warranties with regard to this software, any use,
   and any consequent failure, is purely the responsibility of the user.
 
   Copyright (C) 2010-2011 Robert Laganiere, www.laganiere.name
\*------------------------------------------------------------------------------------------*/

#include "color_detector/colordetector.h"
#include <opencv2/imgproc/imgproc.hpp>
       
cv::Mat ColorDetector::process(const cv::Mat &image) {
       
          // re-allocate binary map if necessary
          // same size as input image, but 1-channel
          result.create(image.rows,image.cols,CV_8U);

          // re-allocate intermediate image if necessary
          converted.create(image.rows,image.cols,image.type());

          // Converting to Lab color space 
          cv::cvtColor(image, converted, CV_BGR2Lab);

          // get the iterators
          cv::Mat_<cv::Vec3b>::iterator it= converted.begin<cv::Vec3b>();
          cv::Mat_<cv::Vec3b>::iterator itend= converted.end<cv::Vec3b>();
          cv::Mat_<uchar>::iterator itout= result.begin<uchar>();

          // for each pixel
          for ( ; it!= itend; ++it, ++itout) {
       
                // process each pixel ---------------------

                  // compute distance from target color
                  if (getDistance(*it)<minDist) {

                          *itout= 255;

                  } else {

                          *itout= 0;
                  }

        // end of pixel processing ----------------
          }

          return result;
}

 

Subversion Repositories OpenCV2-Cookbook

(root)/trunk/Chapter 03/colordetectorLab.cpp - Rev 3 → 5

Rev 3		Rev 5
1	/------------------------------------------------------------------------------------------\	1	/------------------------------------------------------------------------------------------\
2	This file contains material supporting chapter 3 of the cookbook:	2	This file contains material supporting chapter 3 of the cookbook:
3	Computer Vision Programming using the OpenCV Library.	3	Computer Vision Programming using the OpenCV Library.
4	by Robert Laganiere, Packt Publishing, 2011.	4	by Robert Laganiere, Packt Publishing, 2011.
5		5
6	This program is free software; permission is hereby granted to use, copy, modify,	6	This program is free software; permission is hereby granted to use, copy, modify,
7	and distribute this source code, or portions thereof, for any purpose, without fee,	7	and distribute this source code, or portions thereof, for any purpose, without fee,
8	subject to the restriction that the copyright notice may not be removed	8	subject to the restriction that the copyright notice may not be removed
9	or altered from any source or altered source distribution.	9	or altered from any source or altered source distribution.
10	The software is released on an as-is basis and without any warranties of any kind.	10	The software is released on an as-is basis and without any warranties of any kind.
11	In particular, the software is not guaranteed to be fault-tolerant or free from failure.	11	In particular, the software is not guaranteed to be fault-tolerant or free from failure.
12	The author disclaims all warranties with regard to this software, any use,	12	The author disclaims all warranties with regard to this software, any use,
13	and any consequent failure, is purely the responsibility of the user.	13	and any consequent failure, is purely the responsibility of the user.
14		14
15	Copyright (C) 2010-2011 Robert Laganiere, www.laganiere.name	15	Copyright (C) 2010-2011 Robert Laganiere, www.laganiere.name
16	\------------------------------------------------------------------------------------------/	16	\------------------------------------------------------------------------------------------/
17		17
18	#include "colordetector.h"	18	#include "color_detector/colordetector.h"
-		19	#include <opencv2/imgproc/imgproc.hpp>
19		20
20	cv::Mat ColorDetector::process(const cv::Mat &image) {	21	cv::Mat ColorDetector::process(const cv::Mat &image) {
21		22
22	// re-allocate binary map if necessary	23	// re-allocate binary map if necessary
23	// same size as input image, but 1-channel	24	// same size as input image, but 1-channel
24	result.create(image.rows,image.cols,CV_8U);	25	result.create(image.rows,image.cols,CV_8U);
25		26
26	// re-allocate intermediate image if necessary	27	// re-allocate intermediate image if necessary
27	converted.create(image.rows,image.cols,image.type());	28	converted.create(image.rows,image.cols,image.type());
28		29
29	// Converting to Lab color space	30	// Converting to Lab color space
30	cv::cvtColor(image, converted, CV_BGR2Lab);	31	cv::cvtColor(image, converted, CV_BGR2Lab);
31		32
32	// get the iterators	33	// get the iterators
33	cv::Mat_<cv::Vec3b>::iterator it= converted.begin<cv::Vec3b>();	34	cv::Mat_<cv::Vec3b>::iterator it= converted.begin<cv::Vec3b>();
34	cv::Mat_<cv::Vec3b>::iterator itend= converted.end<cv::Vec3b>();	35	cv::Mat_<cv::Vec3b>::iterator itend= converted.end<cv::Vec3b>();
35	cv::Mat_<uchar>::iterator itout= result.begin<uchar>();	36	cv::Mat_<uchar>::iterator itout= result.begin<uchar>();
36		37
37	// for each pixel	38	// for each pixel
38	for ( ; it!= itend; ++it, ++itout) {	39	for ( ; it!= itend; ++it, ++itout) {
39		40
40	// process each pixel ---------------------	41	// process each pixel ---------------------
41		42
42	// compute distance from target color	43	// compute distance from target color
43	if (getDistance(*it)<minDist) {	44	if (getDistance(*it)<minDist) {
44		45
45	*itout= 255;	46	*itout= 255;
46		47
47	} else {	48	} else {
48		49
49	*itout= 0;	50	*itout= 0;
50	}	51	}
51		52
52	// end of pixel processing ----------------	53	// end of pixel processing ----------------
53	}	54	}
54		55
55	return result;	56	return result;
56	}	57	}
57		58
58		59