| 摘要 |
PURPOSE:To make possible the stable formation of a high picture quality half tone image by smoothing the black-and-white border line of a binary image, eliminating isolated dots in a multi-level image and centralizing dots. CONSTITUTION:A frame memory 7 can store binary image data and multi-level image data in the state of mixture, the image processing of binary image data is conducted by a binary image processing part 26, and the image processing of multi-level image data is conducted by a multi-level image processing part 27. These binary image processing part 26 and multi-level image processing part 27 output the density data of a notice picture element and based on these density data, a semiconductor laser driver 30 conducts the pulse width modulation and power modulation of a semiconductor laser 31. Further, the binary image processing part 26 or the multi-level image processing part 27 outputs the direction data of the notice picture element and based on these direction data, the semiconductor laser driver 30 conducts the pulse width modulation and power modulation of the semiconductor laser 31. Based on these processed image data, images are outputted. |
