User Manual - pancroma

2. What Useful Things Can PANCROMA TM Do?________________________________________________________________PANCROMA TM uses a technique called pan sharpening to produce a highresolutioncolor image from three or four low-resolution multispectral bands plusa high-resolution panchromatic band:Low Res Color Bands + High Res Grayscale Band = Hi Res Color ImageSuch band combinations are commonly bundled in satellite data sets, forexample Landsat, SPOT®, GeoEye® and Digital Globe® commercial packagesas well. Pan sharpening transforms the high-resolution grayscale band into ahigh-resolution color image, doubling or quadrupling the resolution of the colorinformation in the data set.Pan sharpening techniques can result in spectral distortions when pansharpening Landsat images as a result of the nature of the panchromatic band.That is, the raw pan sharpened color image may not exactly match the colortones of the corresponding low resolution RGB image. PANCROMA TM providesproprietary algorithms and utilities to reduce this spectral distortion and toproduce visually pleasing images.In addition, PANCROMA TM fills gaps in post-2003 Landsat 7 data. That is, itallows SLC-Off Landsat band files with 22% missing data to be recovered byfilling the missing gaps with either corresponding pre-2003 legacy band data orpost-2003 data (where the gaps are offset). The program also producessynthetic natural color composites from SPOT® and ASTER band files and canproduce pan sharpened SPOT®, and WorldView® images.PANCROMA TM also offers a variety of unique multispectral image analysis tools,including the Point Spectrum Generator TM for generating spectra frommultispectral data sets, and the Spectral Analyzer TM , for interrogating data sets tomatch input spectra.PANCROMA TM can remove blur from satellite images caused by cameravibration, atmospheric turbulence, and other factors using FFT-baseddeconvolution algorithms.PANCROMA TM also offers a variety of image preprocessing and post processingutilities to help you create high quality images from satellite data. These includehaze reduction, vegetation indices, and much more.7