Image Fusion Based On Multi-Scale Transform And Image Fusion Tool Development

Image fusion is a kind of information fusion which is operating on image. By using image processing and computer technology, image fusion can extract image feature information from original images maximally, and then generate a high-quality fused image. The main contributions can be summarized as the follows:1. Proposed an image fusion algorithm based on NSCT. In the algorithm, NSCT transform is first used to decompose source images at each scale and direction to get low-pass sub-band coefficients and band-pass directional sub-band coefficients. Then, the fusion rule of weighted box-counting dimension is adopted in low-pass sub-band, as well as the fusion rule of local space frequency in band-pass directional sub-band. Finally, the NSCT inverse transform is employed to get the fused image. Through check experiment, our algorithm is proved to be simple and effective.2. Proposed a multi-focus image fusion algorithm based on UDCT (Uniform Discrete of Curvelet Transform). The UDCT is a new mathematical and computational tool for multi-resolution data representation which is also able to provide the higher approximation precision of geometric shape and better sparsity representation ability. Firstly, source images are decomposed at each scale and direction by UDCT to get The UDCT sub-band coefficients. Then, the fusion rule of weighted box-counting dimension in low-pass bands and window-based maximum modulus in directional high-pass bands is adopted. Finally, the fusion image is obtained by using inverse UDCT. The contrast test shows that the proposed algorithm is simple and effective.3. Designed and developed a multi-scale transform image fusion tool including the tool interface design, multi-scale transformation method module, high-low-frequency fusion rule module and fusion effect evaluation module.This thesis studies the multi-scale transform and image fusion algorithms. After a lot of experiments, the two proposed algorithms are proved that they both have good performance on the fusion of standard multi-focus image, space motion target image and multi-sensor image. At the same time, in order to facilitate the integration of experimental and fusion performance evaluation, this paper designed and developed the tool of image fusion based on multi-scale transform.