imgCanny2--Performs Canny Edge Detection using gradient input instead of
Float format, Float format
This command works exactly like imgCanny, except that instead of passing
in one image whose gradient is first computed, the gradient itself in
the form of two float format images (the first x and the second y) is
passed in. imgSmooth and imgEdgeSynth must still be run to complete the
Treatment of Valid Region
The output valid region is set to the valid region defined for the first
image in each group with an adjustment for the kernel size.
Treatment of Minimum and Maximum Values
The minimum and maximum values are calcluated during processing.