Picture forecasting and restoring system

  • Inventors:
  • Assignees: Ricoh Co Ltd
  • Publication Date: September 25, 1981
  • Publication Number: JP-S56122275-A


PURPOSE:To reproduce a high-quality picture of a high fidelity, by excepting pattern parts, which are apt to generate the error peculiar to the algorithm of the picture processing, from the object of forecasting and restoration when edge parts showing the half tone of the picture to which a high picture element density is given are forecasted and restored. CONSTITUTION:Picture element information read with a low picture element density are input to shift registers SRA-SRC of one-picture element components successively. Picture element information are delayed in shift register SR1 of one-line components by one-line components and are input to shift registers SRD-SRE of one-picture element components, and further, the output of register LSR1 is delayed in shift register LSR2 by one-line components and is input to shift registers SRF- SRH of one-picture element components successively. Respective picture element information A-H in a specific picture element areas of 3X3 constitution are taken out, and vertical, horizontal and oblique density inclinations are calculated by the first and the second operators OP1 and OP2 and comparators CMP1 and CMP2, and patterns which generate the peculiar forecast error are excepted from the processing object according to the maximum value of these inclinations, and other patterns are stored in buffer memory BM temporarily.




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