Optimize&Fix fitEllipse sample#23356
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asmorkalov merged 1 commit intoopencv:3.4from Mar 17, 2023
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mshabunin
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Mar 14, 2023
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BTW, it would be cool to process key strokes and toggle active algorithms when e.g. 1, 2 and 3 keys have been pressed.
samples/cpp/fitellipse.cpp
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| if( MAX(box.size.width, box.size.height) > MIN(box.size.width, box.size.height)*30 || | ||
| MAX(box.size.width, box.size.height) <= 0 || | ||
| MIN(box.size.width, box.size.height) <= 0){continue;}; | ||
| //size.height >= size.width awalys,only if the pts are on a line or at the same point,size.width=0 |
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size.height >= size.width awalys
Is this behavior built into fitEllipse?
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if( box.size.width > box.size.height )
{
float tmp;
CV_SWAP( box.size.width, box.size.height, tmp );
box.angle = (float)(fmod((90 + theta*180/CV_PI),180.0)) ;
}Yes,in the function of fitEllipseDirect、fitEllipseNoDirect、fitEllipseAMS include above code.
https://github.com/opencv/opencv/blob/4.x/modules/imgproc/src/shapedescr.cpp
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That's a good idea. |
Optimize&Fix fitEllipse sample
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mshabunin
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Mar 16, 2023
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1). At least 5 points can fit an ellipse
2). The result of fitEllipse、 fitEllipseAMS、fitEllipseDirect maybe different,I think it's better to draw the different result,rather than "continue".
3). Need to check the size of boxAMS/boxDirect ,not the size of box,after fitEllipseAMS、fitEllipseDirect.
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Patch to opencv_extra has the same branch name.