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Fixed crash if no chessboard problem

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This commit is contained in:
Gary Bradski 2010-07-14 00:32:35 +00:00
parent 32a33eae9b
commit 730de4d8c3
1 changed files with 14 additions and 7 deletions
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21
samples/cpp/calibration.cpp
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@ -10,9 +10,11 @@ using namespace cv;
using namespace std;
/*
example command line (for copy-n-paste):
calibration -w 6 -h 8 -s 2 -o camera.yml -op -oe image_list.xml
example command line when 3 cameras are connected.
tri_calibration -w 4 -h 5 -s 0.025 -o camera_left.yml -op -oe
example command line for a list of stored images(for copy-n-paste):
tri_calibration -w 4 -h 5 -s 0.025 -o camera.yml -op -oe image_list.xml
where image_list.xml is the standard OpenCV XML/YAML
file consisting of the list of strings, e.g.:
@ -402,7 +404,7 @@ int main( int argc, char** argv )
// improve the found corners' coordinate accuracy
cvtColor(view, viewGray, CV_BGR2GRAY);
cornerSubPix( viewGray, pointbuf, Size(11,11),
if(found) cornerSubPix( viewGray, pointbuf, Size(11,11),
Size(-1,-1), TermCriteria( CV_TERMCRIT_EPS+CV_TERMCRIT_ITER, 30, 0.1 ));
if( mode == CAPTURING && found &&
@ -413,16 +415,21 @@ int main( int argc, char** argv )
blink = capture.isOpened();
}
drawChessboardCorners( view, boardSize, Mat(pointbuf), found );
if(found) drawChessboardCorners( view, boardSize, Mat(pointbuf), found );
string msg = mode == CAPTURING ? "100/100" :
mode == CALIBRATED ? "Calibrated" : "Press 'g' to start";
int baseLine = 0;
Size textSize = getTextSize(msg, 1, 1, 1, &baseLine);
Point textOrigin(view.cols - textSize.width - 10, view.rows - baseLine - 10);
Point textOrigin(view.cols - 2*textSize.width - 10, view.rows - 2*baseLine - 10);
if( mode == CAPTURING )
msg = format( "%d/%d", (int)imagePoints.size(), nframes );
{
if(undistortImage)
msg = format( "%d/%d Undist", (int)imagePoints.size(), nframes );
else
msg = format( "%d/%d", (int)imagePoints.size(), nframes );
}
putText( view, msg, textOrigin, 1, 1,
mode != CALIBRATED ? Scalar(0,0,255) : Scalar(0,255,0));