Survey on multifocus image fusion techniques

Multi-focus image fusion is considered to be a vast research topic. Image fusion is the process in which source images are combined to get a single focused image. This focused image obtained contains relatively more information with all objects in focus and better description of scene. It is applied in various applications like medical imaging, remote sensing etc. Various multi-focus image fusion techniques are discussed in this paper, using focus measures such as energy of gradient of image, spatial frequency etc. The performance of these techniques depends on the methods used to determine the focused regions to get a fused image.