<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><DIV>hi ;</DIV>
<DIV>I got a few(10 values) piksel value through the normal vector. I would like to get these values' first derivative(gradient) to find maximum gradient magnitude . How can I accomplish that? Is there any available class for this?</DIV>
<DIV>Thanks in advance</DIV></div><br>
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