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Image matching

An image and digital image technology, applied in the field of digital image matching, can solve problems such as large amount of calculation

Inactive Publication Date: 2007-03-28
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method is still computationally expensive

Method used

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Embodiment Construction

[0037] The matching scheme of two images will be described in the following embodiments of the present invention. These images may be subsequent images from the video stream, but the invention is not limited thereto. The image is comprised of valid pixels and is available with the binary function I 1 (x, y), I 2 (x, y) to represent the digital image. Among them, x and y are the coordinates to determine the pixel position.

[0038] The matching of two images involves computing a pair of functions M=M x (x,y) and M=M y (x, y). The M function is defined as before as the function that maps each pixel in image I1 to a pixel in I2. The formula on which it is based is: I 2 (x, y) = I 1 (x+M x (x, y), y+M y (x, y)).

[0039] According to one embodiment of the present invention, the construction of the modification function M is to use the formula I 2 (x, y) = I 1 (x+M x (G(x,y)), y+M y (G(x,y))), adjust the previously defined function M, redefine M as a constant functio...

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Abstract

A method for matching digital images, including regularization of image features of a first digital image, composed of pixels, defining a finite set of candidate values, wherein a candidate value represents a candidate for a possible match between image features of the first image and a second image, establishing a matching penalty function for evaluation of the candidate values, evaluating the matching penalty function for every candidate value, selection of a candidate value based on the result of the evaluation of the matching penalty function, regularization of the first image by segmentation of the first image, comprising assigning at least part of the pixels of the first image to respective segments, determining a certainty parameter for at least part of the pixels of a segment, and establishing the matching penalty function to be at least partially based on the certainty parameter.

Description

technical field [0001] The present invention relates to matching of digital images. Background technique [0002] Image processing uses the matching of two or more images, which essentially involves determining matching segments in subsequent images. Image matching is a fundamental step in many areas of image processing, such as depth reconstruction, image data compression, and dynamic analysis. [0003] The matching process includes determining image features in a first location in the first image, and determining the locations of those image features in the second image. Different information in position between features of the first and second images, such as translation or rotation, can be used in further processing. For example, the translation of an image feature between two consecutive images can be used to measure the velocity of an object associated with that image feature. [0004] Image matching can be performed by separate processing steps as described above, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/20G06T7/00
CPCG06T7/00
Inventor R·A·C·布拉斯彭宁F·E·埃恩斯特C·W·A·M·范奥弗维尔德P·维林斯基
Owner KONINK PHILIPS ELECTRONICS NV