Research On Methods And Applications Of Remote Sensing Image Fusion

In current remote sensing technology used in water resource monitoring, one multispectral TM image is often used, the resolution of TM image is low, in order to improve image and monitoring quality, we can use image fusion technique to fuse multispectral TM image and high resolution SPOT pan image of the same water area to get a new image has both high resolution and multispectral characteristics, so as to improve the monitor quality and the usage of images. This is the meaning and aim of this paper.The following main points are included:(1) Analyses the evolution of information fusion, its tate of arts of algorithms.(2) Make a summarize and classification of the current multiresolution RS image fusion algorithms, and analyses algorithms worked on pixel-level, feature-level and decision level, analyses the subject and object standard of the fused image estimate.(3) Compare the complexity and precision of the polynomial method and orthogonal polynomials method used in geometrical adjustment, an experiment is made; some surface fitting method used in spatial co-registration of multiresolution image are studied and experiments are made to show their different in effects; in order to increase the spectral inherit, we make a histogram match in images to be fused.(4) Studied the math and physical background of MS, PCA transform and DWT, IHS+DWT,PCA+DWT methods, beside theory analysis, some experiments are carried out and results are analyzed and compared.(5) Put forward a new image fusion method based on PC A+ DWT, the results of experiment shows the new method is better than traditional methods, and we give an application of this method used in august,2000 Taihu remote sensing image fusion.(6) The last is the summary of my work and the prospect of future work.