This report briefly reviews a new technique for pictorial encoding.Exploiting the characteristics of the human visual system, a halftone screening procedure is utilized to develop a binary -pixel representation of the image.This binary data is then encoded, enabling much less than 1 bit /pixel storage /communications cost.The proposed strategy is simple to implement, primarily digital, and capable of high speeds.Furthermore, the output image is most compatible with binary display and marking engine technologies.
Problem DefinitionThe major issue being addressed in this paper is the large amount of storage /bandwidth required to represent /communicate pictorial information and a method to reduce these requirements.For the applications described below a relatively simple, all digital method to encode /decode pictorial information is enabled which greatly reduces the bit /pixel cost of representing pictorial information. The concept is an outgrowth of analyzing the source, printed pictorials, and the receiver, man, of the information and then incorporating restrictions within this communication channel which yield an economic system.
ApplicationThe application under consideration is the storage, display and printing of pictorial information input in a form such as a glossy photograph to a scanning system.The input limitations are primarily that of dynamic range, i.e., 6 -8 bits of gray scale are deemed sufficient and the scanning system resolution is merely adjusted to provide sufficient "resolution" for the desired detail.For expository purposes 500 sample /in. input and output scanning systems are utilized throughout this paper. Variation of this system parameter to meet specific application need is straightforward.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.