Android Question Level on RSImageFilter.HueFilter


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Anyone familiar with the RSImageProcessing library?

I am testing out RSImageFilter.HueFilter and trying to get a random hue for several images.
The level range to my knowledge is -180 to 180

The following code has no effect:

imv.Bitmap = RSImageFilter.HueFilter(bmp, rnd(-180, 180))

The same image with no visual difference keeps showing up...