Accession Number : ADD012174

Title :   Alternate Line Interpolation Method and Apparatus.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Schaphorst,Richard A ; Bodson,Charles D

Report Date : 18 Feb 1986

Pagination or Media Count : 7

Abstract : A method and apparatus are provided for data compression in a digital facsimile document transmission system. In accordance with the method, only alternate scan lines are transmitted, i.e., every other line is deleted in transmission, and at the receiver, the missing scan lines are interpolated from the transmitted data. This compression technique provides a fixed compression ratio of 2 to 1 regardless of the complexity of the input document. The interpolation method relies on comparing, for each picture element to be interpolated, the colors of one or more pairs of adjacent picture elements of the transmitted scan lines and making a decision as to the color of the picture element to be interpolated on this basis. (Author)

Descriptors :   *PATENTS, *DATA COMPRESSION, *PICTURES, COMPRESSION RATIO, INTERPOLATION, INPUT, COMPRESSION, DOCUMENTS, COLORS

Subject Categories : Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE