Image processing method and apparatus.

摘要

An image processing apparatus comprises: an input unit to input image data, a quantizing unit to quantize the image data inputted by the input unit to the data of at least three or more levels, a memory to store the data quantized by the quantizing unit on a picture unit basis and an output unit to output an image on the basis of the data stored in the memory on the picture unit basis. The quantizing unit quantizes the image data of the present picture in accordance with the quantized data of the previous picture stored in the memory means. The quantizing unit quantizes the input image data of one pixel to the data of three or more levels by using a plurality of threshold values each including an upper threshold value, a standard threshold value, and a lower threshold value. $$