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Image forming apparatus

  • US 4,658,284 A
  • Filed: 01/02/1985
  • Issued: 04/14/1987
  • Est. Priority Date: 01/11/1984
  • Status: Expired due to Term
First Claim
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1. An image forming apparatus comprising:

  • generating means for generating an analog video signal including a large number of horizontal scanning lines;

    sampling signal generating means for generating a sampling signal to sample said video signal point by point with respect to each horizontal scanning line;

    analog-digital converting means for converting said analog video signal into a digital value in response to said sampling signal;

    memory means for storing said digital value;

    pixel number converting means, including a multiplier unit in which each digital value in said memory means is multiplied by a predetermined coefficient and an adder unit in which the multiplied results of consecutive digital values of said multiplier unit are added for converting six digital values in said memory means into five output values; and

    image forming means for image formation in response to signals corresponding to said output values of said converting means.

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