What are the min and max arguments to
EdgeDetect, for all methods and specifically
How do I find the limits or ranges of functions in the future? Or is it 255?
EdgeDetect[image, radius, threshold], the radius is expressed in pixels, and the threshold corresponds to normalized pixel values (ie. in the range from 0 to 1).
@Silvia, there may be differences between a threshold of 1 and a threshold of 1.1 indeed. Such cases include:
- "Real" or "Real32" images where pixel values are outside the 0-1 range.
- Multichannel images for which the vector gradient magnitude is greater than 1.