| 摘要 |
PURPOSE:To improve a color visibility by using a half tone expressing pattern with a different network point central position for a color and executing the recording with the partial area, in the half tone data processing of respective CONSTITUTION:In a circuit to process the half tone of respective colors, for example, a Y half tone processing circuit 109Y, a pattern memory 1012 is provided. Into the memory 1012, the half tone expressing pattern is stored which is distributed so that a dot center can be made different from other color components M and C and a recording information bit can be extended from the above-mentioned center to the outside as a recording concentration comes to be higher. A CPU 1010, when the recording concentration data arrive, specifies the equivalent concentration pattern out of the pattern of the above- mentioned memory 1012, controls an AND circuit LG1 and extracts a part (slave matrix pattern) in the above-mentioned pattern. A data selector G3 and an OR gate LG2 process the extracted data to the bit distribution corresponding to a recording surface and transfer them to a laser driver 112y. |
