Proceedings of SPIE - the International Society for Optical Engineering
We used a 3D wavelet denoising method to reduce noise from multispectral imagery so that small objects may be more readily detected. Our approach exploits the correlation between bands typically present in multispectral imagery. Using our approach, the resulting image generally consists of a weighted sum of both spectral bands and spatial frequencies. We found that we could generally increase the SNR of a multispectral image more than if the spectral bands were processed independently.
Kozaitis, S. P., & Olmstead, T. (1997). Spectrally sensitive wavelet analysis of multispectral imagery for object detection. Paper presented at the Proceedings of SPIE - the International Society for Optical Engineering, , 3071 2-11.