PICTURE SIGNAL PROCESSOR

Japanese Patent JPS63296563

A

PURPOSE:To obtain a picture with excellent quality without moire or unsmooth state due to fluctuation in the density by calculating the peripheral length of the picture element in a scanning window so as to detect a dot shape having a lower concentration and replacing it into a dot shape having higher concentration of the same number of picture element set in advance. CONSTITUTION:Six lines of subscanning are simultaneously stored at one point of time from a picture signal by a line buffer 2 and six picture element are extracted from the picture signal of 6 lines in the line buffer 2 by a window scanning means 3. A non-link deciding means 4 decides whether the outer surrounding color C0 in the scanning window 4 and the picture element in the scanning window are linked or not to the picture element at the outside of the scanning region with respect to 6 X 6 picture elements, and in the case of the nonlink state, the peripheral length of the picture element in different color is calculated by a replacement requesting means 5. A pattern generating means 7 stores the basic arrangement pattern in matching with the number of picture elements, extracts the basic arrangement pattern in matching with the number of picture elements in different color from the outer surrounding color, gives it to a buffer rewriting means 8 of the post-stage, thereby replacing the picture element corresponding to the scanning window by the arrangement pattern. Thus, a picture with less moire and unsmoothness in obtained.

SANNOMIYA KUNIO
NAKAZATO KATSUO
TSUCHIYA HIROYOSHI

JP13250587A

December 02, 1988

May 28, 1987

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MATSUSHITA ELECTRIC IND CO LTD

H04N1/405; G06T3/00; H04N1/40; (IPC1-7): G06F15/66; H04N1/40

Toshio Nakao

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