Proceedings of SPIE - the International Society for Optical Engineering
We combined images from different sensors based on the magnitude of multiscale products of the wavelet transform. Using the product of nondownsampled wavelet coefficients across scales, we formed a fusion rule between two images. In this way, the products represented features than were related to contrast. Therefore, using our approach allowed us to enhance the contrast of two images using a pixel-level fusion approach. In experiments, our approach compared favorably to using only a single level, or other methods using subjective tests.
Ostrem, T., Kozaitis, S. P., & Laszlo, I. (2005). Multilevel fusion using enhanced feature detection. Paper presented at the Proceedings of SPIE - the International Society for Optical Engineering, 5817 329-335. doi:10.1117/12.603932