Rotation and scaling for optical character recognition using end-to-end deep learning
US-11302108-B2 · Apr 12, 2022 · US
Image reading apparatus
US2021377395A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2021377395-A1 |
| Application number | US-202117327506-A |
| Country | US |
| Kind code | A1 |
| Filing date | May 21, 2021 |
| Priority date | Jun 1, 2020 |
| Publication date | Dec 2, 2021 |
| Grant date | — |
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Abstract
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An image reading apparatus includes a conveyance unit and a reading unit. Based on read image data from the reading unit, a tilt amount of an edge of a document on a leading edge side in a conveyance direction in which the document is conveyed is decided. If the decided tilt amount exceeds a first threshold where a setting that performs document digitalization with respect to the image data, notification is given of information indicating that reading of the document for the document digitalization has failed. If the decided tilt amount is smaller than the first threshold, skew correction is executed for correcting the tilt amount based on the decided tilt amount with respect to the image data, and the document digitalization is executed with respect to the image data for which the skew correction has been executed.
First claim
Opening claim text (preview).
What is claimed is: 1 . An image reading apparatus comprising: a conveyance unit configured to convey a document; a reading unit configured to read the document conveyed by the conveyance unit, and to generate image data indicating an image of the document; a notification unit configured to notify a user of information; and one or more controllers configured to perform operations including: deciding, based on the image data, a tilt amount of an edge of the document on a leading edge side in a conveyance direction in which the document is conveyed, wherein the tilt amount corresponds to an angle of tilt to a predetermined direction perpendicular to the conveyance direction, controlling, in a case where the decided tilt amount exceeds a first threshold in a case of a setting that performs document digitalization with respect to the image data, the notification unit so as to give notification of information indicating that reading of the document for the document digitalization has failed, and executing, in a case where the decided tilt amount is smaller than the first threshold in the case of the setting that performs the document digitalization, skew correction for correcting the tilt amount based on the decided tilt amount with respect to the image data, and executing the document digitalization with respect to the image data for which the skew correction has been executed. 2 . The image reading apparatus according to claim 1 , wherein the one or more controllers further are configured to perform operations including executing, in a case of a setting that does not perform the document digitalization, the skew correction with respect to the image data regardless of whether the decided tilt amount is larger than the first threshold. 3 . The image reading apparatus according to claim 1 , wherein the one or more controllers further are configured to perform operations including stopping, in the case of the setting that performs the document digitalization, conveyance of a document that follows the document read by the reading unit in a case where the decided tilt amount is smaller than the first threshold. 4 . The image reading apparatus according to claim 3 , wherein the one or more controllers further are configured to perform operations including stopping, in the case of the setting that performs the document digitalization, conveyance of the document read by the reading unit in a case where the decided tilt amount is smaller than the first threshold. 5 . The image reading apparatus according to claim 3 , wherein the one or more controllers further are configured to perform operations including discharging, in the case of the setting that performs the document digitalization, the document read by the reading unit in a case where the decided tilt amount is smaller than the first threshold.
Assignees
Inventors
Classifications
Comparing, e.g. with threshold · CPC title
- H04N1/00718Primary
Skew · CPC title
Skew detection or correction · CPC title
relating to image data · CPC title
- H04N1/00034Primary
Measuring, i.e. determining a quantity by comparison with a standard (H04N1/00031 takes precedence) · CPC title
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- What does patent US2021377395A1 cover?
- An image reading apparatus includes a conveyance unit and a reading unit. Based on read image data from the reading unit, a tilt amount of an edge of a document on a leading edge side in a conveyance direction in which the document is conveyed is decided. If the decided tilt amount exceeds a first threshold where a setting that performs document digitalization with respect to the image data, no…
- Who is the assignee on this patent?
- Canon Kk
- What technology area does this patent fall under?
- Primary CPC classification H04N1/00718. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Dec 02 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).