Patent ID: 9681011
Date: 2017-06-13
CPC Classifications: H04N

Claim:
1. An original reading apparatus comprising: an original tray on which an original bundle including a plurality of originals is stacked; a conveyor configured to convey an original of the original bundle stacked on said original tray one by one along a conveyance path; a image reading sensor configured to read the conveyed original; a first detector configured to detect a length of the original in a first direction that intersects perpendicularly to a conveyance direction; a second detector configured to detect a length of the original bundle stacked on said original tray in a second direction in which the original is conveyed; a third detector provided on the conveyance path and configured to detect the original conveyed by said conveyor; a processor; a predictor configured to predict a size of the conveyed original using one mode among a plurality of prediction modes, which include a first prediction mode in which one size is selected as the size of the conveyed original from among a plurality of candidates of original sizes corresponding to the length of the original in the first direction detected by said first detector, by referring to a prediction list, and a second prediction mode in which the size of the conveyed original is predicted based on the length of the original in the first direction detected by said first detector and the length in the second direction detected by said second detector; a specifier configured to specify the size of the conveyed original based on the length of the original in the first direction detected by said first detector and the length in the second direction detected by said second detector; and a changer configured to change the prediction mode used by said predictor when the original size predicted by said predictor differs from the original size specified by said specifier, wherein the processor operates to function as the predictor, the specifier, and the changer, and the prediction list associates the length of the original in the first direction and the one size selected from among the plurality of candidates of original sizes corresponding to the length of the original in the first direction with each other.