An interactive flash that detects edges of an image.
Mouse: drags the image.
Select Image: select the desired image.
Apply: applies the settings and calculates the image edges.
Brightness: sets the formula to calculate brightness of the pixels. Default is standard formula (0.2126R + 0.7152G + 0.0722B), sum is (R+G+B)/3, all others use channel values.
Operator: sets the kernels used to convolve the image.
Gradient: sets the way the gradient magnitude is calculated(approximated is a bit faster, but not as precise).
Thresholding: if enabled, will set all pixels with magnitude>threshold to white, and all others to black. Use the slider to set the threshold and the check box to enable or disable it.
Oh yeah, this uses multiple threads, so please make sure that your flash player is up to date.