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| Automatic registration of multi-modal images based on the maximization of the alignment metric |
| Wang Dongfeng; Zou Mouyan |
| Institute of Ecletronics,Chinese Academy of Sciences, Beijing 100080, China |
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Abstract This paper discusses the generalized definition of image registration and proposes a new measure of image registration-the Alignment Metric(AM). This metric can effectively describe the degree of match of two images with different gray level properties. As a result, the problem of image registration is turned into the maximization of the AM. The new criterion can be used to register multi-modal images including the images with different gray level properties. The Powell’s direction set method with multi-resolution is used to search for a global maximum of the AM. The images can then be registered automatically without the need of the previously located control points or landmark points. Experiments using multi-modal medical and remote sensing images demonstrate the effectiveness of the method.
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Received: 15 January 2002
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2003, Vol. 25 
