# US 2021/0344809 A1 · Image reading apparatus and method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0344809 A1 - Document ID: US20210344809A1 - Status: Published application - Kind: A1 - Application number: 17/372,965 - Filed: 2021-07-12 - Published: 2021-11-04 - Earliest claimed: 2018-08-31 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Masashi Nishiyama - Web page: https://patentgrep.com/patent/US20210344809A1 ## CPC - H04N 1/00779: {Adjusting settings, e.g. mode, feeding rate or type of paper} - H04N 1/00474: {outputting a plurality of functional options, e.g. scan, copy or print} - H04N 1/00477: {Indicating status, e.g. of a job (for control or supervision between transmitter and receiver or between image input and image output device H04N2201/3219)} - H04N 1/00708: {Size or dimensions} - H04N 2201/0094: Multifunctional device, i.e. a device capable of all of reading, reproducing, copying, facsimile transception, file transception - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A multifunction peripheral (MFP), which successively conveys a plurality of documents stacked on a document tray and reads the document, determines whether there is a difference among sizes of the plurality of documents in response to at least one of the documents being read by a scanner, in a case where a preview operation of a read image is performed, notifies a user of a possibility that documents having different sizes are mixed and read based on a result of the determination, enables a function of performing reading corresponding to respective document size of mixed size documents in which documents having different sizes are mixed, and provides navigation for prompting re-reading of the document. ## Claims ### Claim 1 An image reading apparatus having a detection function to detect respective sizes of a plurality of documents stacked on a document stacking tray, comprising: a display; a reader; at least one memory storing instructions; and at least one processor executing the instructions causing the image reading apparatus to: receive a reading instruction based on an operation on a start key, wherein, according to the reading instruction, the reader reads the plurality of documents stacked on the document stacking tray and successively conveyed; in a case where there is a difference in respective sizes of at least two documents of the plurality of read documents and a function of performing reading corresponding to respective size of the plurality of documents is disabled when the reading instruction has been received, notify a user of a possibility that documents having different sizes are mixed and read, and provide navigation for prompting enabling the function and then re-reading of the plurality of documents. ### Claim 2 (depends on 1) The image reading apparatus according to claim 1, wherein the instructions cause the image reading apparatus to: detect a length in a conveyance direction of each of the plurality of documents in a conveyance path of the document, and wherein the difference is determined according to the length in the conveyance direction of each of the plurality of documents. ### Claim 3 (depends on 1) The image reading apparatus according to claim 1, wherein the navigation includes an option for skipping an operation for enabling the function and instructing re-reading of the document at a timing at which the navigation is provided, and enabling the function to perform re-reading of the document after all of the plurality of documents are read. ### Claim 4 (depends on 1) The image reading apparatus according to claim 1, wherein the navigation is provided only in a case where the plurality of documents includes a combination of document sizes readable by using the function. ### Claim 5 (depends on 4) The image reading apparatus according to claim 4, wherein the combination is a combination of document sizes in which a size in a direction perpendicular to a conveyance direction of the document are different. ### Claim 6 (depends on 4) The image reading apparatus according to claim 4, wherein the combination includes at least any of a combination of A3 and B4, a combination of A3 and B5, a combination of B4 and A4, a combination of A4 and B5, a combination of A4R and B5, a combination of B4 and A4R, a combination of B4 and A5, a combination of B5 and A5, a combination of ledger and legal, a combination of ledger and folio, and a combination of ledger and half letter. ### Claim 7 (depends on 1) The image reading apparatus according to claim 1, wherein the navigation provides a different content according to a type of a job including reading of the document. ### Claim 8 (depends on 1) The image reading apparatus according to claim 1, wherein the preview screen is displayed including a size guide of a regular size corresponding to a size of the read document or a size guide of a user setting size in an overlapping manner on the image corresponding to the read document. ### Claim 9 (depends on 8) The image reading apparatus according to claim 8, wherein an image corresponding to the read document is editable using the size guide. ### Claim 10 (depends on 1) The image reading apparatus according to claim 1, wherein the instructions cause the image reading apparatus to display a preview screen on the display, and wherein the possibility that documents having different sizes are mixed and read is notified on the preview screen. ### Claim 11 A method for an image reading apparatus including a display, a reader and a detection function to detect respective sizes of a plurality of documents stacked on a document stacking tray, the method comprising: receiving a reading instruction based on an operation on a start key, wherein, according to the reading instruction, the reader reads the plurality of documents stacked on the document stacking tray and successively conveyed; in a case where there is a difference in respective sizes of at least two documents of the plurality of read documents and a function of performing reading corresponding to respective size of the plurality of documents is disabled when the reading instruction has been received, notifying a user of a possibility that documents having different sizes are mixed and read, and providing navigation for prompting enabling the function and then re-reading of the plurality of documents.