| 摘要 |
PURPOSE:To obtain the reducing image of the binary image without demaging the vector characteristic and gradation of an input image by multi-value- displaying the reducing image of the binary original image. CONSTITUTION:A variable power device 1 to obtain the concentration of the reducing output picture element based on the rate occupied in the output picture element of an input picture element, when the binary image is reduced, obtains the output picture element position by the reducing magnification, obtains the area occupied by an input picture element '1' in the surface surrounded by the picture element and makes the area ratio into the concentration of the output image. A rounding device 2 performs the rounding processing by matching the concentration data obtained by the variable power device 1 to the gradation expression force of a display 3. Further, the display 3 displays the displaying data of the multi-gradation obtained through the variable power device 1 and the rounding device 2. Thus, at the time of reducing a binary input image, the fine line of 1 dot width in the input image is held as an intermediate gradation, and the black crushing of the fine graphic, etc., and the moire to occur at the time of reducing a pseudo multi-gradation image do not become prominent. |
