http://www.w3.org/ns/prov#value | - data is a digital representation of a gray scale version of the first digital image, and wherein the gray scale image data comprises a set of data values, wherein each data value of the set of data values identifies a gray scale value of a sequence of gray scale values; determining, for at least a subset of data values, in the set of data values, a slope value for an intensity transition associat
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