Image fusion is the process of combining relevant information in two or more images of a scene into a single highly
informative image. Relevant information depends on the application under consideration.
An example of image fusion to maximize information content is given below. Images in Figs. 1a - 1f represent bands 1, 2,
3, 4, 5, and 7 of a Landsat TM image. The image obtained by fusing these bands is depicted in Fig. 1g. To see fusion
examples of registered multi-exposure and multi-focus images, visit the image fusion software page.
informative image. Relevant information depends on the application under consideration.
An example of image fusion to maximize information content is given below. Images in Figs. 1a - 1f represent bands 1, 2,
3, 4, 5, and 7 of a Landsat TM image. The image obtained by fusing these bands is depicted in Fig. 1g. To see fusion
examples of registered multi-exposure and multi-focus images, visit the image fusion software page.
(a)
(b)
(d)
(c)
(e)
(f)
(g)
Fig. 1. (a)-(f) Bands 1, 2, 3, 4, 5, and 7 of a Landsat TM image. (g) Details in all images are fused into one image.
Image fusion techniques assume that the given images are already registered. In many situations, this assumption does
not hold and the images need to be registered before they are fused. In the following, an example of multi-exposure
image fusion is given where the images are not registered. In this example, first, the images are registered and then, the
registered images are fused. To find out about various image registration techniques, visit the image registration page.
not hold and the images need to be registered before they are fused. In the following, an example of multi-exposure
image fusion is given where the images are not registered. In this example, first, the images are registered and then, the
registered images are fused. To find out about various image registration techniques, visit the image registration page.
(a) (b)
(c) (d)
Fig. 2. (a) - (e) Five images obtained by a hand-held camera at five different exposure levels. (f) The fused image.
First, images (b) - (e) are registered to image (a). The registered images are then fused to obtain image (f).
First, images (b) - (e) are registered to image (a). The registered images are then fused to obtain image (f).
 | |  |
(e) (f)
| Image fusion |
| Image Fusion Systems Research |
