Image descriptor for image recognition

An image and function technology, applied in the field of image descriptors for image recognition, can solve the problem of high false acceptance rate, achieve effective feature extraction, fast matching, and compact identifiers

Active Publication Date: 2009-09-02
RAKUTEN GRP INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0024] ●The false acceptance rate is too h

Method used

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  • Image descriptor for image recognition
  • Image descriptor for image recognition
  • Image descriptor for image recognition

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Embodiment Construction

[0045] Various embodiments of obtaining a representation of an image and using this representation for eg identification, matching or verification of an image or images are described below. As discussed above, the present invention is particularly useful for recognizing images, but it is not limited to image recognition. Similarly, as explained in the embodiments, an image identifier is an example of an image representation, or an example of a descriptor.

[0046] The specific design of the visual identifier according to one embodiment of the present invention is determined by the following factors: requirements related to the type of image modification (which should be robust), size of the identifier, extraction and matching complexity, target false alarm rate, etc. .

[0047] Here we show a general design that obtains identifiers that are robust to image modifications including:

[0048] ● color reduction (reduction),

[0049] ● fuzzy,

[0050] ●Brightness changes,

[0...

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Abstract

A method of deriving a representation of an image by processing signals corresponding to the image, the method comprises deriving a function of the image, where the function of a translated, scaled or rotated version of the image is a translated or scaled version of the function of the image, and using a plurality of frequency components of a frequency representation of the function to derive a representation of the image.

Description

technical field [0001] The present invention relates to methods and devices for representing images, and methods and devices for comparing or matching images (eg for searching or verification, etc.). Background technique [0002] Extensive image databases exist, and it is often necessary to find copies of a particular image or copies of modified versions of that image. Such functionality may be required, for example, in rights management or for search purposes. The same image on different websites can represent similar content and thus provide a valuable search lead. Another important application is the identification and association between "film" photographs and negatives and other digital archives. [0003] A hashing algorithm such as MD5 can be used to detect identical images. A hash function generates a value based on content; if two images are identical, they will have the same hash value. However, traditional methods such as MD5 are bit-sensitive, meaning that a c...

Claims

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Application Information

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IPC IPC(8): G06K9/52G06F17/30G06V10/48
CPCG06K9/4633G06K9/522G06F16/583G06V10/48G06V10/431
Inventor 米罗斯瓦夫·博贝尔保罗·布拉斯尼特
Owner RAKUTEN GRP INC
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