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US 8,428,366 B2Granted
High performance image identification
AssigneeMitsubishi Electric Corporation
InventorsPaul Brasnett, Miroslaw Bober
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AssigneeMitsubishi Electric Corporation
InventorsPaul Brasnett, Miroslaw Bober
Estimating the term…
A method and apparatus for deriving a representation of an image is described. The method involves processing signals corresponding to the image. A two-dimensional function of the image, such as a Trace transform (T (d, θ)), of the image using at least one functional T, is derived and processed using a mask function (β) to derive an intermediate representation of the image, corresponding to a one-dimensional function. In one embodiment, the mask function defines pairs of image bands of the Trace transform in the Trace domain. The representation of the image may be derived by applying existing techniques to the derived one-dimensional function.
A method of deriving a representation of an image by processing signals corresponding to the image, the method comprising:
A method of deriving a representation of an image by processing signals corresponding to the image, the method comprising;
Dependencies are inferred from the claim text.
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Extraction of image or video features: by mapping characteristic values of the pattern into a parameter space, e.g. Hough transformation
Global feature extraction by analysis of the whole pattern, e.g. using frequency domain transformations or autocorrelation: by analysing segments…
Image and video recognition
About 3 years 5 months of term left · ends 14 Mar 2030 (estimated)
1. Field of the Invention
The present invention relates to a method and apparatus for representing an image, and, in addition, a method and apparatus for comparing or matching images, for example, for the purposes of searching or validation.
2. Description of the Background Art
Embodiments of the invention will be described with reference to the accompanying drawings, of which:
FIG. 1a shows an image;
FIG. 1b shows a reduced version of the image of FIG. 1a;
Various embodiments for deriving a representation of an image, specifically an image identifier, and for using such a representation/identifier for the purposes of, for example, identification, matching or validation of an image or images, will be described below. The present invention is especially useful for, but is not restricted to, identifying an image. In the described embodiments, an “image identifier” (or simply “identifier”) is an example of a representation of an image and the term is used merely to denote a representation of an image, or descriptor.
The skilled person will appreciate that the specific design details of a image identification apparatus and method, according to an embodiment of the invention, and the derivation of an image identifier for use in image identification, is determined by the requirements related to the type of image modifications it should be robust to, the size of the identifier, extraction and matching complexity, target false-alarm rate, etc.
The following example illustrates a generic design that results in an identifier that is robust to the following modifications to an image (this is not an exhaustive list):