Many of the algorithms in InfoPACK make use of a physically correct model derived from the image-formation process that produces SAR images. This is particularly true of the speckle-reduction and edge-detection functions. The more the statistical properties of an image deviate from those of a SAR image, the less optimally these algorithms will perform. Because of this, it is important to resize or average down images as intensity data and not as amplitude data. We provide the utilities (see appendix B) to help you do this.