# US 2017/0264764 A1 · Document reading device, image processing device, document reading method and program > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0264764 A1 - Document ID: US20170264764A1 - Status: Published application - Kind: A1 - Application number: 15/454,030 - Filed: 2017-03-09 - Published: 2017-09-14 - Earliest claimed: 2016-03-11 - Assignees: Konica Minolta, Inc. - Applicants: Konica Minolta, Inc. - Inventors: Kazuhiro Ishiguro - Web page: https://patentgrep.com/patent/US20170264764A1 ## CPC - H04N 1/00806: {According to type of the original, e.g. colour paper or transparency, or reading a plurality of different types of original} - H04N 1/0032: {with a medium handling apparatus, e.g. a sheet sorter (handling thin or filamentary material, e.g. sheets B65H)} - H04N 1/00718: {Skew} - H04N 1/0435: {Optical element switching, e.g. switching lenses into a single optical path} - H04N 1/0464: {capable of performing non-simultaneous scanning at more than one scanning station} - H04N 1/3878: {Skew detection or correction} - H04N 1/4076: {dependent on references outside the picture} - H04N 2201/0081: Image reader (H04N2201/0091 - H04N2201/0094 take precedence) - 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 document reading device includes: a conveying unit configured to convey a document; a background member having a mark for correcting an inclination of the document; a color reading unit configured to read an image of the document and to output color image data; a monochrome reading unit configured to read the image of the document and to output monochrome image data; a switching unit configured to switch between a first state and a second state; and a hardware processor configured to switch into the first state at the time of a color mode, and to switch into the second state at the time of the monochrome mode, configured to detect the inclination of the document, and configured to correct the inclination of the color image data, and to correct the inclination of the monochrome image data, in accordance with the detected inclination of the document. ## Claims ### Claim 1 A document reading device comprising: a conveying unit configured to convey a document; a background member provided in a direction traversing a conveyance direction of the document and having a mark for correcting an inclination of the document; a color reading unit configured to read an image of the document conveyed by the conveying unit and to output color image data; a monochrome reading unit configured to read the image of the document conveyed by the conveying unit and to output monochrome image data; a switching unit configured to switch between a first state in which the image of the document can be read by the color reading unit and a mark of the background member can be read by the monochrome reading unit, and a second state in which the image of the document can be read by the monochrome reading unit and the mark of the background member can be read by the color reading unit; and a hardware processor configured to switch into the first state by the switching unit at the time of a color mode to read the image of the document by the color reading unit and read the mark of the background member at the time of passage of the document by the monochrome reading unit, and to switch into the second state by the switching unit at the time of the monochrome mode to read the image of the document by the monochrome reading unit and read the mark of the background member at the time of passage of the document by the color reading unit, configured to detect the inclination of the document on the basis of the reading result of the mark of the background member at the time of passage of the document by the color reading unit or the monochrome reading unit, and configured to correct the inclination of the color image data output from the color reading unit at the time of the color mode, and to correct the inclination of the monochrome image data output from the monochrome reading unit at the time of the monochrome mode, in accordance with the detected inclination of the document. ### Claim 2 (depends on 1) The document reading device according to claim 1, wherein the switching unit switches the first state and the second state, by moving the color reading unit and the monochrome reading unit to different positions with respect to the background member, at the time of the color mode and at the time of the monochrome mode. ### Claim 3 (depends on 1) The document reading device according to claim 1, wherein the switching unit switches the first state and the second state, by moving the background member to different positions with respect to the color reading unit and the monochrome reading unit, at the time of the color mode and at the time of the monochrome mode. ### Claim 4 (depends on 1) The document reading device according to claim 1, wherein the monochrome reading unit is disposed on an upstream side of the color reading unit in a document conveyance direction. ### Claim 5 (depends on 4) The document reading device according to claim 4, further comprising: a delay memory configured to delay monochrome image data output from the monochrome reading unit, until the inclination of the document is detected by the hardware processor, at the time of the monochrome mode. ### Claim 6 (depends on 1) The document reading device according to claim 1, further comprising: an automatic discrimination mode setting unit capable of setting an automatic discrimination mode of discriminating whether a document is a color document or a monochrome document, wherein, when the automatic discrimination mode is set by the automatic discrimination mode setting unit, the switching unit switches to the first state, and the reading control unit performs reading of the image of the document using the color reading unit and reading of the mark of the background member at the time of passage of the document using the monochrome reading unit. ### Claim 7 (depends on 1) The document reading device according to claim 1, wherein the monochrome reading unit is constituted by a light receiving unit of one line or more. ### Claim 8 (depends on 1) An image processing device comprising the document reading device according to claim 1. ### Claim 9 A document reading method executed in a document reading device comprising: a conveying unit configured to convey a document; a background member provided in a direction traversing a document conveyance direction and having a mark for correcting an inclination of the document; a color reading unit configured to read an image of the document conveyed by the conveying unit and to output color image data; and a monochrome reading unit configured to read the image of the document conveyed by the conveying unit and to output monochrome image data, the method comprising: a switching step of switching a first state in which the image of the document can be read by the color reading unit and a mark of the background member can be read by the monochrome reading unit, and a second state in which the image of the document can be read by the monochrome reading unit and the mark of the background member can be read by the color reading unit; a reading control step of switching into the first state by the switching step at the time of a color mode to read the image of the document by the color reading unit and read the mark of the background member at the time of passage of the document by the monochrome reading unit, and switching into the second state by the switching step at the time of the monochrome mode to read the image of the document by the monochrome reading unit and the mark of the background member at the time of passage of the document by the color reading unit; an inclination detecting step of detecting the inclination of the document on the basis of the reading result of the mark of the background member at the time of passage of the document by the color reading unit or the monochrome reading unit; and an inclination correcting step of correcting the inclination of the color image data output from the color reading unit at the time of the color mode, and correcting the inclination of the monochrome image data output from the monochrome reading unit at the time of the monochrome mode, in accordance with the inclination of the document detected by the inclination detection step. ### Claim 10 (depends on 9) A non-transitory recording medium storing a computer readable document reading program for causing a computer of a document reading device to execute the document reading method according to claim 9. ### Claim 11 (depends on 10) The non-transitory recording medium storing a computer readable document reading program according to claim 10, wherein the first state and the second state are switched in the switching step, by moving the color reading unit and the monochrome reading unit to different positions with respect to the background member at the time of the color mode and at the time of the monochrome mode. ### Claim 12 (depends on 10) The non-transitory recording medium storing a computer readable document reading program according to claim 10, wherein the first state and the second state are switched in the switching step, by moving the background member to different positions with respect to the color reading unit and the monochrome reading unit at the time of the color mode and at the time of the monochrome mode. ### Claim 13 (depends on 10) The non-transitory recording medium storing a computer readable document reading program according to claim 10, wherein the monochrome reading unit reads the image of the document or the mark of the background member on an upstream side of the color reading unit in the document conveyance direction. ### Claim 14 (depends on 13) The non-transitory recording medium storing a computer readable document reading program according to claim 13, wherein, at the time of the monochrome mode, the monochrome image data output from the monochrome reading unit is delayed by a delay memory, until an inclination of the document is detected by the inclination detection step. ### Claim 15 (depends on 10) The non-transitory recording medium storing a computer readable document reading program according to claim 10, further comprising: an automatic discrimination mode setting step of setting an automatic discrimination mode which discriminates whether the document is a color document or a monochrome document, wherein, when the automatic discrimination mode is set by the automatic discrimination mode setting step, switching to the first state is performed in the switching step, and in the reading control step, the image of the document is read by the color reading unit and the mark of the background member at the time of passage of the document is read by the monochrome reading unit. ### Claim 16 (depends on 10) The non-transitory recording medium storing a computer readable document reading program according to claim 10, wherein the monochrome reading unit includes light receiving units of one line or more.