| 摘要 |
PROBLEM TO BE SOLVED: To suppress mis-detection and detection omission without increasing an arithmetic quantity. SOLUTION: Sets (D, D') of object values are decided in the same field as that for interpolation pixels on the basis of values of pixels (A, B, C) and (C', B', A') closest to the interpolation pixel on two lines vertically adjacent to the interpolation pixel (S1). A maximum value G, a minimum value L of the sets (D, D') of the object values and a mean value Z of pixel values X, Y at the same position as that of the interpolation pixel in two adjacent fields are calculated (S2). A variable (s) that changes within a range of 0<=s<=(an absolute value of pixel value fluctuation width) is calculated so as to be smaller as each of motion coefficients k is greater on the basis of the history of the motion coefficients k (S2, S4). A median median (G+s, L-s, Z) is calculated (S5) and this median is adopted as a value of an interpolation pixel (S6).
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