Patent ID: 6128419
Filing Date: 2000-10-03
Classification: H04N

Abstract:
An image processing apparatus comprising:a scanner for scanning data from first type sheets and second type sheets;a converter for converting data scanned by said scanner to digital multi-valued coded data;a comparator for comparing digital multi-valued coded data of said first type sheets and said second type sheets with a threshold level to generate binary coded data representing the data on said first type sheets and said second type sheets; anda corrector, arranged to receive a signal from an operator indicative of whether the scanner is scanning first type sheets or second type sheets, to perform Modulation Transfer Function (MTF) correction on said digital multi-valued coded data from said first type, sheets and outputs MTF corrected data, said corrector being switched off when said scanner is scanning second type sheets and being switched on to output said MTF corrected data when said scanner is scanning first type sheets.