The dynamic range of a digitized image database is extended to permit shifting of encoded pixel values without `clipping`, and to provide limited windows of values into which specular highlights and unusually low reflectances or areas of objects in shadow light may be encoded and stored. Digital codes...http://www.google.com.au/patents/US5224178?utm_source=gb-gplus-sharePatent US5224178 - Extending dynamic range of stored image database
