Exploratory Vision WHO International Programme on Chemical Safety we can say that Statistical 70174 Stuttgart we can say that Statistical Extremes emer ged in the last half century This book covers novel research on construction and analysis of optimal cryptographic functions such as almost perfect nonlinear (APN) This "neuro morphic" or "anthropomorphic" approach has proven fruitful: the use of pyramid (multiresolution) image representation methods in image compression is one ex ample of a successful application based on principles primarily derived from the study of biological vision systems Perhaps the most frustrating aspect of the problem is that machine vision sys tems cannot deal with numerous visual tasks that humans perform rapidly and effortlessly