CV_Canny

Parameters

srcimg :

single-channel 8-bit input image.

threshold1 :

first threshold for the hysteresis procedure.

threshold2 :

second threshold for the hysteresis procedure.

aperture_size :

aperture size for the Sobel() operator.

L2gradient :

a flag, indicating whether a more accurate

Description

This function can be used for finding edes in single channel 8 bit image. 'aperture_size' and 'L2gradient' are optionals. By default, aperture_size is 3 and L2gradient is false.

For L2gradient: L_2 norm =sqrt{(dI/dx)^2 + (dI/dy)^2} should be used to calculate the image gradient magnitude (L2gradient=1 ), or whether the default L_1 norm =|dI/dx|+|dI/dy| is enough (L2gradient=0).

This is curretly dummy function. It provides no functionality but is required for providing support for generating C code for OpenCV

Examples

img = CV_LoadImage('~/test.jpg',0) dst = CV_CvtColor(img,"CV_RGB2GRAY"); edge = CV_Canny(dst,50,100,3,0);

See also

• CV_CvtColor

Authors

• Siddhesh Wani