the result of MagicWand.vi in vision examples is always different,why?

[nongnong]

We can find the MagicWand example in labview/examples/vision/ functions/Grayscale Processing.

and when we click an object in the picture, we can extact the object from the picture. But the problem is that the result is different when you click different place of the object.

who can tell me the reason?

[ThSa]

The documentation of the example offers following information:

This example shows how to create an image mask by extracting a region surrounding a reference pixel, called the origin, and using a tolerance (+ or -) of intensity variations based on this reference pixel. Using this origin, the Magic Wand Tool searches for its neighbors with an intensity equal to or falling within the tolerance value of the point of reference.

regards,

ThSa

Message Edited by ThSa on 01-04-2006 01:08 PM

[nongnong]

Thanks very much for your help!