void
rectangle(InputOutputArray img, Point pt1, Point pt2, const Scalar& color, int thickness=1, int lineType=LINE_8, int shift=0 )
void
rectangle(Mat& img, Rect rec, const Scalar& color, int thickness=1, int lineType=LINE_8, int shift=0 )
Parameters:
-
img – Image.
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pt1 – Vertex of the rectangle.
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pt2 – Vertex of the rectangle opposite to pt1 .
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rec – Alternative specification of the drawn rectangle.
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color – Rectangle color or brightness (grayscale image). （Scalar 颜色BGR）
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thickness – Thickness of lines that make up the rectangle. Negative values, like CV_FILLED , mean that the function has to draw a filled rectangle.
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lineType – Type of the line. See the description.
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shift – Number of fractional bits in the point coordinates.
void line(InputOutputArray
img, Point
pt1, Point
pt2, const Scalar&
color, int
thickness=1, int
lineType=LINE_8, int
shift=0 )
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