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Image registration method improvement

An image and phase image technology, applied in the field of transformation of two images, can solve problems such as low calculation efficiency and poor signal-to-noise ratio

Inactive Publication Date: 2006-07-05
CANON KK
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0035] Existing methods for registering images related by translation, rotation, and scaling have poor signal-to-noise ratios on many kinds of images when the transformation parameters are such that the overlap between the two images is significantly reduced
Furthermore, existing methods contain 180-degree ambiguity, which will lead to computational inefficiencies

Method used

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Embodiment Construction

[0059] Where steps and / or features with the same reference number are referenced in any one or more drawings, unless the contrary meaning appears, these steps and / or features have the same function or operation for the purpose of description.

[0060] It should be noted that the discussion contained in the "Background" section relating to existing image registration methods should not be read as a statement by the inventors or patent applicants that these methods form part of the general general knowledge in the art in any way part.

[0061] figure 1 is a flowchart of a method 200 for determining a transformation associated with two images according to an embodiment of the present invention, wherein the transformation includes rotation, scaling and translation. The method 200 of determining a transformation that associates two images preferably uses a method such as figure 2 The general purpose computer system 100 shown is implemented, wherein, figure 1 The method can be i...

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Abstract

A method (200) of determining at least rotation and scale parameters of a transformation relating two images is disclosed. The method (200) starts by forming a spatial domain representation of each of the images that is invariant to translation of the images. A correlation in the log-polar domain is next performed between the representations. After detecting a magnitude peak in the correlation, the method (200) determines the rotation and scale parameters from the position of the magnitude peak.

Description

technical field [0001] The present invention relates generally to image registration, and in particular to determining a transformation that registers two images that are related by rotation, scaling, and translation. Background technique [0002] Image registration is the process of determining correspondences between pixel elements in a pair of images that have a common subject matter. Specifically, image registration involves determining the parameters of a transformation that associates pixel elements in a pair of images. Therefore, image registration is an important aspect of image matching in which two images are compared for common subject matter under the assumption that there is some geometric transformation that relates substantial parts of the two images. Image registration is also used in satellite and medical imaging, where a series of partially overlapping images is obtained and a mosaic of the individual images must be formed to form a single large image. ...

Claims

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Application Information

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IPC IPC(8): G06T7/60G06T7/00
CPCG06T7/0026G06T7/32
Inventor 斯蒂芬·詹姆斯·哈迪彼得·阿尔雷宁·弗莱彻基兰·杰勒德·拉金
Owner CANON KK
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