Patent ID: 9262701
Filing Date: 2016-02-16
CPC Classification: G06K,H04N

Claim Text:
1. An image processing apparatus, comprising: a reading unit configured to read an image formed on a sheet; an erasing unit configured to erase the image formed on the sheet; and a controller configured to determine whether or not the image on the sheet as read by the reading unit is formed of an erasable material and prevent the sheet that is determined to have an image formed of the non-erasable material from being conveyed to the erasing unit, wherein the reading unit includes an image sensor formed of a plurality of pixels, the image sensor configured to generate a plurality of RGB signals corresponding to the image on the sheet, each of the RGB signals corresponding to one of the pixels, and the controller is configured to convert each of the RGB signals to a Lab signal and determine whether or not the image on the sheet as read by the reading unit is formed of the erasable material based on the converted Lab signals.