Image processing device and image processing method

• US 20050078885A1
• Filed: 10/07/2004
• Published: 04/14/2005
• Est. Priority Date: 10/08/2003
• Status: Active Grant

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Ozaki, Hiroshi, Mino, Kazuhiro, Ogura, Katsuo
• Granted Patent: US 7,474,808 B2
• Time in Patent Office: Days
• US Class Current: 382/305
• CPC Class Codes: G06V 30/242 Division of the character sequences into groups prior to recognition; Selection of dictionaries

Abstract

A partial image identifying section extracts objects from an inputted image inputted by an image inputting section, and identifies types of the objects. A characteristic information generating section generates characteristic information of each object on the basis of a characteristic amount computed for each object. A plurality of partial image databases are provided for the respective types of objects. For each object, a degree of similarity computing section computes, on the basis of both characteristic information, degrees of similarity with all objects registered in the partial image database which corresponds to the type of the object. A photographing time period specifying section specifies a photographing time period, from the respective degrees of similarity computed by the degree of similarity computing section. A registering section registers extracted objects in association with the specified photographing time period, in the databases of the types corresponding to the objects.

Claims

1. An image processing device comprising:

a partial image extracting section extracting a partial image from an inputted image;

a type distinguishing section distinguishing a type of the partial image;

a plurality of partial image databases provided respectively for each of the types, and storing registered partial images and photographing time periods of the registered partial images in association with one another;

a characteristic information generating section generating characteristic information of the partial image and characteristic information of the registered partial images;

a degree of similarity computing section computing, on the basis of both characteristic information, degrees of similarity between the partial image and the registered partial images which are stored in the partial image database which corresponds to the type of the partial image;

a photographing time period specifying section specifying a photographing time period of the inputted image, on the basis of results of computation by the degree of similarity computing section; and

an outputting section outputting the photographing time period which is specified.

2. The image processing device of claim 1, wherein the photographing time period specifying section specifies, as the photographing time period of the inputted image, a photographing time period of a registered partial image whose degree of similarity is greater than or equal to a predetermined threshold value and whose degree of similarity is highest, among the degrees of similarity computed by the degree of similarity computing section.

3. The image processing device of claim 1, further comprising a registering section which registers, in the corresponding partial image database, the partial image together with information regarding the photographing time period specified by the photographing time period specifying section.

4. The image processing device of claim 2, further comprising a registering section which registers, in the corresponding partial image database, the partial image together with information regarding the photographing time period specified by the photographing time period specifying section.

5. The image processing device of claim 1, wherein the partial image database is structured from a plurality of partial image databases for each type of object structuring the inputted image.

6. The image processing device of claim 5, wherein, in each of the plurality of partial image databases, partial image data of objects photographed in advance at various time periods is stored in association with added information such as photographing time period information thereof.

7. The image processing device of claim 6, wherein the photographing time period includes year, month, and date.

8. The image processing device of claim 5, wherein one partial image database of the plurality of partial image databases is a building database, and at least one partial image data among buildings such as office buildings, houses and the like, various types of monuments, landmarks, and the like, is stored in the building database.

9. The image processing device of claim 5, wherein one partial image database of the plurality of partial image databases is a fashion database, and a partial image database of clothes which were common in or which were in vogue in each era is stored in the fashion database.

10. The image processing device of claim 5, wherein one partial image database of the plurality of partial image databases is a hairstyle database, and a partial image database of hairstyles which were common in or which were in vogue in each era is stored in the hairstyle database.

11. The image processing device of claim 5, wherein one partial image database of the plurality of partial image databases is a small article database, and at least one partial image data among mailboxes and public telephones of each era, and pop-culture goods or brand-name goods which were popular at those times, is stored in the small article database.

12. An image processing method comprising the steps of:

judging whether or not an image has been inputted by an image inputting section;

if an image has been inputted, dividing the inputted image into regions for each object included in the inputted image, and extracting object regions, and identifying types of extracted objects;

computing a characteristic amount for each identified object, and on the basis of the characteristic amount, generating characteristic information of each object;

for each identified object, computing, on the basis of both characteristic information, degrees of similarity with all objects which are registered in a partial image database of a type corresponding to the object;

specifying a photographing time period on the basis of the respective degrees of similarity;

registering the extracted objects in association with the specified photographing time period, in the partial image databases of the types corresponding to the objects; and

outputting the specified photographing time period.