Some aspects of the disclosure provide a method of image processing. In some examples, based on a motion vector of a reference block in a first reference picture of a current picture and a position of the reference block in the first reference picture, a current block in the current picture corresponding to the reference block is determined. A matching relationship between the first reference picture and a second reference picture that is used in an inter prediction for the current picture is determined. Based on the matching relationship and the motion vector of the reference block, a first motion vector predictor of the current block is generated. Apparatus and non-transitory computer-readable storage medium counterpart embodiments are also contemplated.