jit.sobel
Description
jit.sobel provides two different kinds of edge detection algorithms.
Examples
Discussion
Both implemented edge detection modes use 3x3 convolution kernels to compute a 2-dimensional spatial gradient of an incoming matrix, brightening features with "high spatial frequency" -- a large amount of change from cell to cell -- and darkening features with less change. The Sobel detector is fairly good at detecting edges in all directions, while the Prewitt is more biased toward edges running vertically and horizontally along the matrix frame.
Matrix Operator
matrix inputs:1, matrix outputs:1
| Name | IOProc | Planelink | Typelink | Dimlink | Plane | Dim | Type |
|---|---|---|---|---|---|---|---|
| out | n/a | 1 | 1 | 1 | 1 | 1 | char long float32 float64 |
More about Matrix Operators
The Jitter MOP
MOP Arguments
MOP Attributes
MOP Messages
Attributes
mode [int]
The detection mode. (default = 0 (Sobel))
0 = Sobel
1 = Prewitt
thresh [float]
The threshold below which matrix values are set to 0. (default = 0.)
Common Box Attributes
See Also
| Name | Description |
|---|---|
| Working with Video in Jitter | Working with Video in Jitter |
| jit.brass | |
| jit.qt.effect | |
| jit.robcross | |
| Tutorial 25: Tracking the Position of a Color in a Movie | Tutorial 25: Tracking the Position of a Color in a Movie |