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#include <stdio.h>
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#include <stdio.h>
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namespace cvtools{
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namespace cvtools{
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// Lightly modified OpenCV function which accepts a line width argument
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// Lightly modified OpenCV function which accepts a line width argument
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void drawChessboardCorners(cv::InputOutputArray _image, Size patternSize, cv::InputArray _corners, bool patternWasFound, int line_width=1){
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void drawChessboardCorners(cv::InputOutputArray _image, cv::Size patternSize, cv::InputArray _corners, bool patternWasFound, int line_width){
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    Mat corners = _corners.getMat();
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    cv::Mat corners = _corners.getMat();
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    if( corners.empty() )
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    if( corners.empty() )
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        return;
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        return;
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    Mat image = _image.getMat(); CvMat c_image = _image.getMat();
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    cv::Mat image = _image.getMat(); CvMat c_image = _image.getMat();
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    int nelems = corners.checkVector(2, CV_32F, true);
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    int nelems = corners.checkVector(2, CV_32F, true);
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    CV_Assert(nelems >= 0);
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    CV_Assert(nelems >= 0);
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    cvDrawChessboardCorners( &c_image, patternSize, (CvPoint2D32f*)corners.data,
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    cvDrawChessboardCorners( &c_image, patternSize, (CvPoint2D32f*)corners.data,
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                             nelems, patternWasFound, line_width);
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                             nelems, patternWasFound, line_width);
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}
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}
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void cvDrawChessboardCorners(CvArr* _image, CvSize pattern_size, CvPoint2D32f* corners, int count, int found, int line_width=1){
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void cvDrawChessboardCorners(CvArr* _image, CvSize pattern_size, CvPoint2D32f* corners, int count, int found, int line_width){
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    const int shift = 0;
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    const int shift = 0;
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    const int radius = 4;
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    const int radius = 12;
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    const int r = radius*(1 << shift);
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    const int r = radius*(1 << shift);
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    int i;
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    int i;
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    CvMat stub, *image;
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    CvMat stub, *image;
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    double scale = 1;
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    double scale = 1;
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    int type, cn, line_type;
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    int type, cn, line_type;
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        {
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        {
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            CvPoint pt;
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            CvPoint pt;
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            pt.x = cvRound(corners[i].x*(1 << shift));
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            pt.x = cvRound(corners[i].x*(1 << shift));
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            pt.y = cvRound(corners[i].y*(1 << shift));
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            pt.y = cvRound(corners[i].y*(1 << shift));
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            cvLine( image, cvPoint( pt.x - r, pt.y - r ),
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            cvLine( image, cvPoint( pt.x - r, pt.y - r ),
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                    cvPoint( pt.x + r, pt.y + r ), color, 1, line_type, shift );
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                    cvPoint( pt.x + r, pt.y + r ), color, line_width, line_type, shift );
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            cvLine( image, cvPoint( pt.x - r, pt.y + r),
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            cvLine( image, cvPoint( pt.x - r, pt.y + r),
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                    cvPoint( pt.x + r, pt.y - r), color, 1, line_type, shift );
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                    cvPoint( pt.x + r, pt.y - r), color, line_width, line_type, shift );
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            cvCircle( image, pt, r+(1<<shift), color, 1, line_type, shift );
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            cvCircle( image, pt, r+(1<<shift), color, line_width, line_type, shift );
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        }
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        }
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    }
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    }
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    else
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    else
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    {
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    {
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        int x, y;
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        int x, y;
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                if( i != 0 )
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                if( i != 0 )
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                    cvLine( image, prev_pt, pt, color, 1, line_type, shift );
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                    cvLine( image, prev_pt, pt, color, 1, line_type, shift );
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                cvLine( image, cvPoint(pt.x - r, pt.y - r),
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                cvLine( image, cvPoint(pt.x - r, pt.y - r),
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                        cvPoint(pt.x + r, pt.y + r), color, 1, line_type, shift );
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                        cvPoint(pt.x + r, pt.y + r), color, line_width, line_type, shift );
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                cvLine( image, cvPoint(pt.x - r, pt.y + r),
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                cvLine( image, cvPoint(pt.x - r, pt.y + r),
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                        cvPoint(pt.x + r, pt.y - r), color, 1, line_type, shift );
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                        cvPoint(pt.x + r, pt.y - r), color, line_width, line_type, shift );
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                cvCircle( image, pt, r+(1<<shift), color, 1, line_type, shift );
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                cvCircle( image, pt, r+(1<<shift), color, line_width, line_type, shift );
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                prev_pt = pt;
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                prev_pt = pt;
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            }
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            }
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        }
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        }
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    }
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    }
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}
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}