saddles

saddles ( integer Input, integer Output )

Use this function to find saddle points of thin bright structures in color and grayscale images. The function works by treating the image as a topographic surface and extracting the points of minimums in the intensity ridges. See watershed for more details.

Parameters

Input

An integer between 0 and 116 specifying the input image frame number. A value of 0 represents the DMA memory buffer of the video device. Values in the range of 100-116 correspond to hidden frames.

Output

An integer between 1 and 116 specifying the output image frame number. Values in the range of 100-116 correspond to hidden frames.

Error flags

ERR_OK

The flag set if successful.

ERR_FAILED

The flag set if failed.

Example

This set of statements finds the saddle points in an inverted sample image.

setCurDir ("samples")

loadIm (1,"sample3.iwd")

invert(1,1)

saddles(1,2)