Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2011-08-23
2011-08-23
Garcia, Gabriel I (Department: 2625)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C358S003020
Reexamination Certificate
active
08004719
ABSTRACT:
A plurality of types of basic tiles are arranged in a matrix area while prohibiting an arrangement of only ON or OFF elements in two rows and two columns, to acquire an element matrix representing an arrangement of dots in a gray level of 50%. After one element is specified in each of a set of the ON elements and a set of the OFF elements, a process of specifying an element farthest from specified elements is repeated to acquire a turn-on order of dots with increase in gray level on a highlight side and a turn-off order of dots with decrease in gray level on a shadow side, and a threshold value of each element is determined in accordance with these orders. With this operation, it is possible to generate a threshold matrix which is capable of reducing graininess in an image generated by halftoning an original image.
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Dainippon Screen Mfg. Co,. Ltd.
Garcia Gabriel I
McDermott Will & Emery LLP
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