Finds the edges on the input image image and marks them in the output image edges using the Canny algorithm. The smallest of threshold1 and threshold2 is used for edge linking, the largest - to find initial segments of strong edges.

Namespace:  Emgu.CV
Assembly:  Emgu.CV (in Emgu.CV.dll) Version: 2.0.1.0 (2.0.1.0)

Syntax

C#
public static void cvCanny(
	IntPtr image,
	IntPtr edges,
	double threshold1,
	double threshold2,
	int aperture_size
)
Visual Basic (Declaration)
Public Shared Sub cvCanny ( _
	image As IntPtr, _
	edges As IntPtr, _
	threshold1 As Double, _
	threshold2 As Double, _
	aperture_size As Integer _
)
Visual C++
public:
static void cvCanny(
	IntPtr image, 
	IntPtr edges, 
	double threshold1, 
	double threshold2, 
	int aperture_size
)

Parameters

image
Type: System..::.IntPtr
Input image
edges
Type: System..::.IntPtr
Image to store the edges found by the function
threshold1
Type: System..::.Double
The first threshold
threshold2
Type: System..::.Double
The second threshold.
aperture_size
Type: System..::.Int32
Aperture parameter for Sobel operator

See Also