Patent ID: 6831756
Filing Date: 2004-12-14
Classification: H04N

Abstract:
An image processing apparatus comprising:a threshold mask storage unit for storing a first threshold mask having threshold values corresponding to a number of gray levels, wherein the number of gray levels of the first threshold mask is larger than the number of gray levels of an input image; a selection unit for selecting one tone reproduction characteristic from a plurality of tone reproduction characteristics; a generation unit for generating a second threshold mask having threshold values corresponding to a number of gray levels, wherein the number of gray levels of the second threshold mask is equal to the number of gray levels of the input image, from the first threshold mask stored in said threshold mask storage unit on the basis of the tone reproduction characteristic selected by said selection unit; a conversion unit for converting a pixel value of the input image using the second threshold mask generated by said generation unit; and an output unit for outputting the image converted by said conversion unit to an output apparatus.