This function calculates the radial derivative of an input image.

Input parameters:

inputImage - the image to calculate the derivative from

radialFilterLength - the length of the filter to use, total length

will be 2*radialFilterLength+1

centerX and centerY - the point that is considered the center of the

image, for the calculation

minRadius and maxRadius - the minimum and maximum radius to calculate

the angular derivative for.

radialApproach - set to 1 to use a radius and angle search method, or 0

for a per-pixel approach

-This function calculates the radial derivative of an input image.

Input parameters:

　　inputImage - the image to calculate the derivative from

　　radialFilterLength - the length of the filter to use, total length

　　　　will be 2*radialFilterLength+1

　　centerX and centerY - the point that is considered the center of the

　　　　image, for the calculation

　　minRadius and maxRadius - the minimum and maximum radius to calculate

　　　　the angular derivative for.

　　radialApproach - set to 1 to use a radius and angle search method, or 0

　　　　for a per-pixel approach