SCANNER AND NON-TRANSITORY COMPUTER-READABLE RECORDING MEDIUM FOR IMAGE PROCESSING DEVICE

A scanner has a controller configured to control a conveyer to convey original sheets one by one along a conveying passage, control an image sensor to optically read the original sheet, determine a detection position of the original sheet based on an output signal of the detection sensor, obtain target image data containing at least a partial image of the original sheet at a detection area including the detection position, determine whether the particular fixed object exists at the detection area of the original sheet by analyzing the target image data with use of particular image information, interrupt conveyance of the original sheet by the conveyer when the detection position is determined, based on an output signal of the detection sensor, to be an overlapped position and when it is detected, by analyzing the target image data, that the particular fixed object does not exist at the detection area.