Image registration method and device

An image registration and image technology, which is applied in image analysis, image data processing, instruments, etc., can solve problems such as large interference influence and pixel-level error, and achieve good results

Inactive Publication Date: 2008-07-16
SHENZHEN THUNDER NETWORK TECH
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Problems solved by technology

[0005] However, the existing technology is a phase correlation algorithm and Fourier transform for the entire image, which is greatly affected by interferen

Method used

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  • Image registration method and device
  • Image registration method and device

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Embodiment Construction

[0022] Since noise and other disturbances have less impact on the low-frequency data of the image in the frequency domain, and the fractional phase correlation algorithm can locate the sub-pixel level translation of the two images. Therefore, the embodiment of the present invention obtains a more accurate relative offset by phase detection in the low-frequency region of the frequency domain of the two images, and uses this to perform image registration on the two images, thereby improving the accuracy and accuracy of the image registration. noise immunity.

[0023] Referring to Fig. 1, the implementation process of the main method of image registration in this embodiment is as follows:

[0024] Step 101: Extract the low-frequency regions of the frequency domain of the two images according to preset parameters. This step reduces the interference of noise on the image.

[0025] Step 102: Determine the relative offset of the two images according to the low-frequency region.

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Abstract

The invention discloses an image registration method, which is used for improving the accuracy of image registration. The method is as follows: carrying out linear Fourier transformation of each image according to preset parameters, and picking up the low frequency domain of each image frequency domain; determining the amount of relative deviation between two images according to the low frequency domain and fraction phase related algorithm; carrying out image mosaic of the two images according to the amount of relative deviation. The invention also discloses a device for realizing the method.

Description

technical field [0001] The invention relates to the field of computer and image processing, in particular to an image registration method and device. Background technique [0002] With the rapid development of computer technology, image registration technology is more and more applied to computer vision, medicine, military affairs, remote sensing image analysis and other fields. For example, in the production process of panoramic images, it is often necessary to shoot different positions of a scene from multiple different orientations, and then register and stitch these images. In medical applications, it is often necessary to take slice images of patients at the same position in different periods, and analyze pathological changes in different periods. In the field of remote sensing image analysis, it is often necessary to acquire and register multi-source remote sensing images, and generate a fusion image according to a certain algorithm to facilitate analysis. [0003] A...

Claims

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Application Information

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IPC IPC(8): G06T7/00
Inventor 刘汉洲
Owner SHENZHEN THUNDER NETWORK TECH
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