Patent ID: 6606172
Filing Date: 2003-08-12
Classification: H04N

Abstract:
An image information processing apparatus for performing an information process on information read by a four-channel output CCD, the apparatus comprising:accumulation means for reading an image on a pattern document having a plurality of gray scales and accumulating photoelectrically converted electric signals (OS1 to OS4) of the image in a one-line element; a four-channel output CCD having a first output section for outputting the electric signals (OS1) accumulated in the accumulation means from a first end portion of the one-line element at even intervals, a second output section for outputting the electric signals (OS2) accumulated in the accumulation means from the first end portion of the one-line element at odd intervals, a third output section for outputting the electric signals (OS3) accumulated in the accumulation means from a second end portion of the one-line element at even intervals, and a fourth output section for outputting the electric signals (OS4) accumulated in the accumulation means from the second end portion of the one-line element at even intervals; correction amount determination means for comparing the electric signals (OS1, OS2) from the first end portion, received from the four-channel output CCD, and the electric signals (OS3, OS4) from the second end portion, detecting deviations for the respective gray scales of the pattern document, finding an average of the deviations and determining the average value to be a correction amount; and correction means for correcting the deviations between the electric signals (OS1, OS2) from the first end portion of the four-channel output CCD and the electric signals (OS3, OS4) from the second end portion, on the basis of the correction amount determined by the correction amount detennination means.