Image processing device and method, and image display device and method

An image processing method for interpolating a newly interpolated frame between data of a current frame of an image and data of a first delayed frame one frame before the current frame, comprising:

• a motion vector detection step for referring to the data of the current frame, the data of the first delayed frame, and data of a second delayed frame two frames before the current frame, and calculating a first motion vector from the first delayed frame to the current frame;
• a motion vector conversion step for converting the first motion vector to a second motion vector from the first delayed frame to the interpolated frame and a third motion vector from the current frame to the interpolated frame;
• and
• an interpolated frame generation step for generating data for the interpolated frame from the second motion vector, the third motion vector, the data of the first delayed frame, and the data of the current frame, and outputting image data in which the data of the interpolated frame are inserted between the data of the current frame and the data of the first delayed frame;
• wherein
• the motion vector detection step includes
• a test interpolation step for generating a plurality of test interpolation data from the data of the second delayed frame and the data of the current frame,
• an interpolation data evaluation step for evaluating the plurality of test interpolation data on a basis of the data of the first delayed frame and outputting a plurality of evaluation data, and
• a motion vector determination step for generating the first motion vector on a basis of the plurality of evaluation data.