Method CalcMotionGradient

Computes the motion gradient orientation image from the motion history image

public static void CalcMotionGradient(InputArray mhi, OutputArray mask, OutputArray orientation, double delta1, double delta2, int apertureSize = 3)

mhi InputArray: Motion history single-channel floating-point image.
mask OutputArray: Output mask image that has the type CV_8UC1 and the same size as mhi. Its non-zero elements mark pixels where the motion gradient data is correct.
orientation OutputArray: Output motion gradient orientation image that has the same type and the same size as mhi. Each pixel of the image is a motion orientation, from 0 to 360 degrees.
delta1 double: Minimal (or maximal) allowed difference between mhi values within a pixel neighborhood.
delta2 double: Maximal (or minimal) allowed difference between mhi values within a pixel neighborhood. That is, the function finds the minimum ( m(x,y) ) and maximum ( M(x,y) ) mhi values over 3x3 neighborhood of each pixel and marks the motion orientation at (x, y) as valid only if: min(delta1, delta2) <= M(x,y)-m(x,y) <= max(delta1, delta2).
apertureSize int