Patent ID: 6832008
Filing Date: 2004-12-14
Classification: H04N

Abstract:
An image reading apparatus, comprising:light-emitting means for irradiating an original with invisible light and visible light; photodetection means for detecting light from the original irradiated by said light-emitting means to output image data; region detection means for detecting a first image region recognized as anomaly in first image data output by said photodetection means when the original is irradiated with the invisible light from said light-emitting means, and detecting a second image region, corresponding to the first image region, recognized as anomaly in second image data output by said photodetection means when the original is irradiated with the visible light from said light-emitting means; shift correction means for correcting a shift between the first image region and the second image region; determination means for determining, as an anomalous region, a region in the second image data, which corresponds to the first image region, and anomaly correction means for correcting image data in the anomalous region determined by said determination means.