Information processing apparatus

Patent metadata

Field	Value
Publication number	US-10445570-B2
Application number	US-201815892894-A
Country	US
Kind code	B2
Filing date	Feb 9, 2018
Priority date	Mar 21, 2017
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

Abstract

An information processing apparatus includes a detecting unit that detects a feature location in an image, a sorting unit that sorts regions in the image into plural regions different in terms of attribute, a memory that stores a rule that associates an attribute of a region with a priority of the region, and a determining unit that checks the feature locations detected from two images against each other, and determines a similarity between the two images by accounting for, in check results, the priority of the region associated by the rule with the attribute of the region containing the feature locations.

First claim

What is claimed is:

1. An information processing apparatus comprising:
a detecting unit that detects a feature location in an image;
a sorting unit that sorts regions in the image into a plurality of regions different in terms of attribute;
a memory that stores a rule that associates an attribute of a region with a priority of the region; and
a determining unit that checks the feature locations detected from two images against each other, and determines a similarity between the two images by accounting for, in check results, the priority of the region associated by the rule with the attribute of the region containing the feature locations.

2. The information processing apparatus according to claim 1 , wherein the rule further associates a position of the region in the image with the priority of the region, and
wherein the determining unit determines the similarity by accounting for the priority of the region associated by the rule with the position of the region containing the feature locations to be checked.

3. The information processing apparatus according to claim 2 , wherein the rule further associates a magnitude of a deviation between the positions of regions having a common attribute in the two images with the priority of the region, and
wherein the determining unit determines the similarity by accounting for the priority of the regions associated by the rule with the magnitude of the deviation between the positions of the regions containing the feature locations to be checked.

4. The information processing apparatus according to claim 3 , wherein the rule further associates a size of a feature quantity of the feature location contained in the region with the priority of the region; and
wherein the determining unit determines the similarity by accounting for the priority associated by the rule with the size of the feature quantity of the region containing the feature locations to be checked.

5. The information processing apparatus according to claim 3 , further comprising an identifying unit that identifies a type of an application program that has been used to designate an image that serves as a determination target for the similarity,
wherein the rule associates the attribute of the region with the priority of the region, on each type of the application program, and
wherein the determining unit determines the similarity by accounting for the priority associated by the rule with the attribute of the region containing the feature locations to be checked, and the type of the identified application program.

6. The information processing apparatus according to claim 2 , wherein the rule further associates a size of a feature quantity of the feature location contained in the region with the priority of the region; and
wherein the determining unit determines the similarity by accounting for the priority associated by the rule with the size of the feature quantity of the region containing the feature locations to be checked.

7. The information processing apparatus according to claim 2 , further comprising an identifying unit that identifies a type of an application program that has been used to designate an image that serves as a determination target for the similarity,
wherein the rule associates the attribute of the region with the priority of the region, on each type of the application program, and
wherein the determining unit determines the similarity by accounting for the priority associated by the rule with the attribute of the region containing the feature locations to be checked, and the type of the identified application program.

8. The information processing apparatus according to claim 7 , wherein the region contains a first region where characters are displayed, and a second region where a photograph or a picture is displayed,
wherein the rule associates the attribute with the priority such that a priority of the first region is set to be higher than a priority of the second region if the application program is configured to edit a character string, and such that the priority of the second region is set to be higher than the priority of the first region if the application program is configured to edit an image.

9. The information processing apparatus according to claim 1 , wherein the rule further associates a magnitude of a deviation between the positions of regions having a common attribute in the two images with the priority of the regions, and
wherein the determining unit determines the similarity by accounting for the priority of the regions associated by the rule with the magnitude of the deviation between the positions of the regions containing the feature locations to be checked.

10. The information processing apparatus according to claim 9 , wherein the rule further associates a size of a feature quantity of the feature location contained in the region with the priority of the region; and
wherein the determining unit determines the similarity by accounting for the priority associated by the rule with the size of the feature quantity of the region containing the feature locations to be checked.

11. The information processing apparatus according to claim 9 , further comprising an identifying unit that identifies a type of an application program that has been used to designate an image that serves as a determination target for the similarity,
wherein the rule associates the attribute of the region with the priority of the region, on each type of the application program, and
wherein the determining unit determines the similarity by accounting for the priority associated by the rule with the attribute of the region containing the feature locations to be checked, and the type of the identified application program.

12. The information processing apparatus according to claim 1 , wherein the rule further associates a size of a feature quantity of the feature location contained in the region with the priority of the region; and
wherein the determining unit determines the similarity by accounting for the priority associated by the rule with the size of the feature quantity of the region containing the feature locations to be checked.

13. The information processing apparatus according to claim 1 , further comprising an identifying unit that identifies a type of an application program that has been used to designate an image that serves as a determination target for the similarity,
wherein the rule associates the attribute of the region with the priority of the region, on each type of the application program, and
wherein the determining unit determines the similarity by accounting for the priority associated by the rule with the attribute of the region containing the feature locations to be checked, and the type of the identified application program.

14. The information processing apparatus according to claim 13 , wherein the region contains a first region where characters are displayed, and a second region where a photograph or a picture is displayed,
wherein the rule associates the attribute with the priority such that a priority of the first region is set to be higher than a priority of the second region if the application program is configured to edit a character string, and such that the priority of the second region is set to be higher than the priority of the first region if the application program is configured to edit an image.

15. The information processing apparatus according to claim 1 , further comprising a content determining unit that determines content of an image,
wherein the rule associates the attribute of the region with the priority of the region on a content b

Assignees

• Fuji Xerox Co Ltd

Inventors

• Kawano Hiroyuki

Classifications

• G06F18/2113

  by ranking or filtering the set of features, e.g. using a measure of variance or of feature cross-correlation · CPC title

• G06V10/462

  Salient features, e.g. scale invariant feature transforms [SIFT] · CPC title

• G06T7/74

  involving reference images or patches · CPC title

• G06T7/174

  involving the use of two or more images · CPC title

• G06T7/11

  Region-based segmentation · CPC title