生活與筆記本: cvCanny

2013年10月23日星期三

C: void cvCanny(const CvArr* image, CvArr* edges, double threshold1, double threshold2, int aperture_size=3 )

Parameters:

Parameters:	image – single-channel 8-bit input image. edges – output edge map; it has the same size and type as `image` . threshold1 – first threshold for the hysteresis procedure. threshold2 – second threshold for the hysteresis procedure. apertureSize – aperture size for the `Sobel()` operator. L2gradient – a flag, indicating whether a more accurate $L_2$ norm $=\sqrt{(dI/dx)^2 + (dI/dy)^2}$ should be used to calculate the image gradient magnitude ( `L2gradient=true` ), or whether the default $L_1$ norm $=\|dI/dx\|+\|dI/dy\|$ is enough ( `L2gradient=false` ).

image – single-channel 8-bit input image.
edges – output edge map; it has the same size and type as image .
threshold1 – first threshold for the hysteresis procedure.
threshold2 – second threshold for the hysteresis procedure.
apertureSize – aperture size for the Sobel() operator.
L2gradient – a flag, indicating whether a more accurate $L_2$ norm $=\sqrt{(dI/dx)^2 + (dI/dy)^2}$ should be used to calculate the image gradient magnitude ( L2gradient=true ), or whether the default $L_1$ norm $=|dI/dx|+|dI/dy|$ is enough ( L2gradient=false ).

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