Patent ID: 8538070

Claim:
A motion detecting method, comprising: receiving a composite signal including a target frame and a reference frame; for a target pixel of the target frame, selecting a first reference pixel from the target frame and selecting a second reference pixel and a third reference pixel from the reference frame, wherein the first reference pixel and the target pixel locate at a target scanning line, and the locations of the second reference pixel and the third reference pixel correspond to the locations of the target pixel and the first reference pixel, respectively; generating a first signal according to the pixel values of the target pixel and the first reference pixel; calculating a first difference between the target pixel and the first reference pixel and a second difference between the second reference pixel and the third reference pixel, and generating a second signal according to the first difference and the second difference; selecting a first plurality of pixels from the target frame and a second plurality of pixels from the reference frame, according to the target pixel, wherein the second plurality of pixels corresponds to the first plurality of pixels; generating a third signal according to the averaged value of the first plurality of pixels and the averaged value of the second plurality of pixels; and determining a motion condition of the target pixel according to the first signal, the second signal, and the third signal.