Information processing apparatus and information processing method

• US 8,406,473 B2
• Filed: 12/08/2009
• Issued: 03/26/2013
• Est. Priority Date: 12/11/2008
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Tanaka, Shuya
• Primary Examiner(s): Mehta, Bhavesh
• Assistant Examiner(s): GORADIA, SHEFALI DINESH
• Application Number:
  US12/633,585
• Publication Number:
  US 20100150456A1
• Time in Patent Office: 1,204 Days
• Field of Search: 382/100, 382/107, 382/219
• US Class Current: 382/107
• CPC Class Codes: G08B 13/19602 Image analysis to detect motion of the intruder, e.g. by frame subtraction
• CPC Class Codes: G08B 13/19606 Discriminating between target movement or movement in an area of interest and other non-signicative movements, e.g. target movements induced by camera shake or movements of pets, falling leaves, rotating fan
• CPC Class Codes: G08B 13/19615 wherein said pattern is defined by the user

Abstract

An information processing apparatus and method for processing an input image by comparing a stored background image with the input image to obtain a difference, collating a change in the difference and time of the change with conditions for the occurrence of a periodic event and information as to the time of occurrence of the periodic event, which are previously stored in a storage unit, to determine whether the change in state of the input image is the periodic or a non-periodic movement of an object, and selecting, according to a result of the determination, any one of operations according to the periodic or the non-periodic movement of an object.

Claims

1. An information processing apparatus comprising:

a background image storage unit configured to store a background image;

a periodic event storage unit configured to store conditions for the occurrence of a periodic event and information as to the time of the occurrence of the periodic event;

an image input unit configured to input an image;

an image comparison unit configured to compare the background image stored in the background image storage unit with an input image input from the image input unit to obtain a difference;

a determination unit configured to determine, after change in the difference and time of the occurrence of the change is detected with us of the comparison by the image comparison unit, whether a predetermined time has elapsed or not;

a periodic event collation unit configured to collate a change in the difference and time of the change with the conditions for the occurrence of the periodic event and the information as to the time of the occurrence of the periodic event stored in the periodic event storage unit in order to determine whether the change of the input image in state is the periodic or the non-periodic movement of an object when it is determined that the predetermined time has elapsed by the determination unit; and

a selection unit configured to select, according to the result of a determination by the periodic event collation unit, any one of operations according to the periodic or the non-periodic movement of an object, and

wherein even when the periodic event collation unit determines that the change in state is the non-periodic movement of an object and when the movement of an object is repeated the predetermined number of times or more, the conditions and the information stored in the periodic event storage unit are changed so that the periodic event collation unit can determine that the movement of the object is the periodic movement of the object.

2. The information processing apparatus according to claim 1, wherein the selection unit is configured not to select a warning operation for the appearance and the disappearance of an object when it is determined that a change in state is the periodic movement of an object, and is configured to select the warning operation when it is determined that a change in state is the non-periodic movement of an object.

3. The information processing apparatus according to claim 2, wherein the warning operation includes a display using a figure, light, voice, or character.

4. The information processing apparatus according to claim 1, wherein the selection unit is configured to select the warning operation when the movement of an object occurs earlier or later than a scheduled time at which an object is periodically moved.

5. The information processing apparatus according to claim 1, wherein the selection unit is configured to select the warning operation when the movement of an object does not occur even after a scheduled time has passed at which an object is periodically moved.

6. The information processing apparatus according to claim 1, wherein the conditions for the occurrence include conditions in which the position of change in the difference is included in a predetermined area.

7. The information processing apparatus according to claim 1, wherein the conditions for the occurrence includes conditions in which a size of change in the difference is included in a predetermined size.

8. The information processing apparatus according to claim 1, wherein the conditions for the occurrence include conditions in which the color of change in the difference is included in a predetermined color.

9. The information processing apparatus according to claim 1, wherein the conditions for the occurrence include conditions in which the shape of change in the difference is in a predetermined shape.

10. The information processing apparatus according to claim 1, wherein the conditions for the occurrence include conditions in which a temperature of change in the difference is within a predetermined temperature.

11. The information processing apparatus according to claim 1, wherein the conditions for the occurrence include conditions in which a weight of change in the difference is within a predetermined weight.

12. The information processing apparatus according to claim 1, wherein the periodic event collation unit is further configured to collate when it is determined that the predetermined time has elapsed by the determination unit.

13. An information processing method for an information processing apparatus configured to process an input image, the method comprising:

comparing a stored background image with the input image to obtain a difference;

determining, after change in the difference is detected, whether a predetermined time has elapsed or not;

collating a change in the difference and time of the occurrence of the change with conditions for the occurrence of a periodic event and information as to the time of occurrence of the periodic event, which are previously stored in a storage unit, to determine whether the change in state of the input image is the periodic or a non-periodic movement of an object when it is determined that the predetermined time has elapsed; and

selecting, according to a result of the determination, any one of operations according to the periodic or the non-periodic movement of an object

wherein even when the periodic event collation unit determines that the change in state is the non-periodic movement of an object and when the movement of an object is repeated the predetermined number of times or more, the conditions and the information stored in the periodic event storage unit are changed so that the periodic event collation unit can determine that the movement of the object is the periodic movement of the object.

14. The information processing method according to claim 13, further comprising performing the collating when it is determined that the predetermined time has elapsed.