Image processing apparatus

摘要

An image processing apparatus includes a quantization unit configured to use a comparison threshold value; a generating unit configured to include an error input section for inputting error data between the quantized data generated and the pre-quantization data and a memory storing a value corresponding to a difference between the comparison threshold value and an original threshold value allocated in a threshold matrix and to generate the value corresponding to the difference as an addition data that is added to a value of an input image data of the processing object pixel, without using the error data input to the error input section for adjusting the input image data of the processing object pixel; and a processing unit configured to add the value of the addition data to the value of the input image data to output input image data to which the value of the addition data is added.

主权项

1. An image processing apparatus comprising:
a quantization unit configured to generate quantized data having smaller gradation levels than that of the pre-quantization data by using a comparison threshold value with which pre-quantization data of a processing object pixel is compared; a generating unit configured to include an error input section for inputting error data between the quantized data generated by the quantization unit and the pre-quantization data and a memory storing a value corresponding to a difference between the comparison threshold value and an original threshold value allocated in a threshold matrix that defines threshold values according to an arrangement of pixels and to generate the value corresponding to the difference as an addition data that is added to a value of an input image data of the processing object pixel, without using the error data input to the error input section for adjusting the input image data of the processing object pixel; and a processing unit configured to add the value of the addition data generated by the generating unit to the value of the input image data of the processing object pixel to output input image data to which the value of the addition data is added.