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Image comparison apparatus, image comparison method, and program

A technology of image comparison and comparison device, which is applied in image coding, image communication, image data processing and other directions, and can solve the problem of increasing the total calculation amount of processing.

Inactive Publication Date: 2011-10-12
SONY CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the technology disclosed in Japanese Patent Application Laid-Open No. 2004-45565 has a problem that the amount of calculation for processing the entirety increases because it is necessary to completely decode the image or video content before searching

Method used

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  • Image comparison apparatus, image comparison method, and program
  • Image comparison apparatus, image comparison method, and program
  • Image comparison apparatus, image comparison method, and program

Examples

Experimental program
Comparison scheme
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no. 1 example

[0050] 1. First embodiment (image comparison means: comparison between specific image and code stream when code block sizes are different)

[0051] 2. Second embodiment (image comparison means: comparison between code streams when code block sizes are different)

no. 3 example

[0052] 3. The third embodiment (image comparison means: comparison between code streams when the number of resolution levels is different)

no. 4 example

[0053] 4. Fourth Embodiment (Personal Computer)

[0054]

[0055] [Summary of Image Search]

[0056] The present invention relates to image search systems, and more particularly, to figure 1 In an image search system that searches for an image D identical to a specific image QU from a JPEG2000 code stream stored in a database DB as shown in , the specific image is compared with an image of the Joint Photographic Experts Group 2000 (JPEG2000) code stream and the A device for classifying images.

[0057] First, an outline of image comparison will be described.

[0058] The JPEG2000 code stream is a code stream (encoded data) obtained by encoding image data according to the JPEG2000 scheme. This encoding is performed using wavelet transform according to the JPEG2000 scheme.

[0059] In wavelet transform, analysis filtering processing is performed to split image data into low-pass components and high-pass components in the vertical and horizontal directions of the image. Th...

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Abstract

The invention discloses an image comparison apparatus, an image comparison method, and a program. A code block size comparison unit examines an inclusion relationship of code block size. A comparing target code block determination unit determines a comparing target code block based on an inclusion relationship of code block. A zero bit plane number comparison unit compares the numbers of zero bit planes of the comparing target code blocks and determines match or mismatch between a specific image and a comparing target code stream. The invention can be applied to, for example, an image comparison apparatus.

Description

technical field [0001] The present invention relates to an image comparison device, an image comparison method, and a program, and more particularly, to an image comparison device, an image comparison method, and a program capable of achieving image comparison with high precision even when encoding parameters used in encoding are different. Background technique [0002] In the prior art, in order to search video content, it is necessary to use a search query for a specific image to search for an image substantially identical to the specific image from unknown video content. For example, there has been proposed a technique that searches video content for a specific image by extracting feature quantities of individual short-time frames from video content, constructing a feature vector, and comparing this feature vector with the feature vector of a specific image. An image that substantially coincides with the specific image (for example, see Japanese Patent Application Laid-Op...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30G06T9/00H04N7/26G06V10/52H04N1/41H04N19/00H04N19/102H04N19/136H04N19/196H04N19/34H04N19/423H04N19/63
CPCH04N19/48H04N19/64G06V10/52G06V10/752
Inventor 福原隆浩贵家仁志
Owner SONY CORP
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