The original image as is the autocorrelation and power spectrum is isotropic first-order Markov process, the use of motion blur based on the direction of the direction of the differential method of identifying the direction of motion blurred images of high-pass filter (the direction of derivative) When the filter direction is the direction of motion blur, due to the blurred image corresponding to the direction of high frequency components at least, high pass filter (the direction of derivative) to the maximum energy loss of blurred images, the resulting differential image intensity value (bilinear interpolation) of and the inevitable minimum. So the direction of differential image intensity values ​ ​ obtained and the minimum in the corresponding direction is the direction of motion blur

motion_direction\motion_direction.m
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motion_direction

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