Patent ID: 6304863
Filing Date: 2001-10-16
Classification: G06T

Abstract:
In an image forming apparatus using an image input data group and an image output date group to produce an image and including a data converting apparatus that converts the image input data group into an image output data group in accordance with at least one conversion coefficient having a discrete conversion coefficient value, a conversion coefficient determining apparatus comprising:computing apparatus that computes, for each conversion coefficient having a discrete value, an image output data group converted from the image input data group in accordance with at least two candidate conversion coefficient values from among:a current conversion coefficient value of the conversion coefficient,a candidate conversion coefficient value that is greater than a current conversion coefficient value of the conversion coefficient by a predetermined step s1, anda candidate conversion coefficient value that is smaller than the current conversion coefficient value of the conversion coefficient by a predetermined step s2; andconversion coefficient value selecting apparatus that selects one of the at least two candidate conversion coefficient values as a new conversion coefficient value on the basis of errors between:the image output data group converted from the image input data group in accordance with one candidate conversion coefficient value, andan ideal image output data group corresponding to the image input data group.