Image reading apparatus
地域：
Nagoya
摘要
An image reading apparatus, having a conveyer, a sheet tray, an obtaining device, a memory, a determining device, and a controller, is provided. The controller determines whether information concerning pixels in the memory indicates edge positions or edge absence in in read-image data concerning a sheet, detects an upstream leading-end position and a downstream leading-end position, detects upstream continuing pixels and downstream continuing pixels, detects an upstream lateral-end position and a downstream lateral-end position, calculates a line representing an upper end of the sheet based on the upstream leading-end position and the downstream leading-end position, calculates an upstream corner position and a downstream corner position based on the upstream and downstream lateral-end positions and the line representing the upper end of the sheet, and calculates a width of the sheet based on the upstream corner position and the downstream corner position.
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The image processor 46 includes an ASIC, which is an IC dedicated to image processing, to apply imaging processes to digital data. The imaging processes may include a correcting process, such as gamma correction. The image processor 46 may apply the imaging processes to the digital data to generate digital image data. The digital image data generated in the image processor 46 may be saved in the RAM 42 through the bus 48.
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