Hochgeschwindigkeitssystem zur Ausrichtung und Verlegung von Schwellenmatrizen während der Erzeugung von binären Halbtonbildern

• Main Authors: FUJII, DAVID B, RUST, ROBERT A
• Format: Patent
• Language: German
• Published: 03.08.2006
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION

A system (60) converts a source image (10) into destination image (18) pixels that are binary. The system (60) includes a memory (86) which stores at least a portion of a row of source grey level pixels, and a corresponding row of a threshold matrix (13) of plural rows of grey level pixel values, each row including at least W pixel values. A scale register (208) stores N source grey level pixel values that have been scaled to match N grey level destination image (18) pixel locations. A threshold register (222) outputs, in parallel, up to N of the W threshold pixel values. Alignment logic (216, 218) controllably enters the threshold pixel values into the threshold register (222). A controller (100) operates the alignment logic (216, 218)to enter the W threshold pixel values into N contiguous storage positions in the threshold register (222), and if W is greater than N, enables entry of excess ones of the W threshold pixel values into contiguous storage positions in the threshold register (222) after the (W - N) previously entered threshold pixel values have been outputted. A comparator (206) compares the N source pixel values with corresponding ones of the N threshold pixel values and assigns N binary values to the destination image (18) in accordance with the comparing action.