Density processing method

摘要

A density processing method is provided by which data relating the input gray level to the output gray level of images to be copied are previously generated and stored in first storing means (11) and then transferred to second storing means (13). The address of the input/output gray level data in the second storing means is set by a conversion process depending on the designated density of the copy to be made. During conversion of the addresses, some of the destination addresses may become blank. The present method generates new output gray level data for these addresses and stores them in the second storing means (13). <IMAGE>