Image processing apparatus

摘要

An image processing device determines whether or not a scanned image is copy-prohibited based on comparisons between a histogram of the brightness of the pre-stored copy-prohibited material such as paper currency and a histogram of the scanned image, and/or between the size of the copy-prohibited material and the size of the scanned image. A document is scanned by a scanning unit, and the brightness histogram of the scanned image is generated by a histogram generating unit. This histogram is then used by a copy-prohibited determining unit to determine whether or not to prohibit copying.