Method and apparatus for testing output device

Details Method and apparatus for testing output device Method and apparatus for testing output device

1997-05-12

1998-03-17

Nguyen, Hoa T.

Excavating

371 272, 364717, G01R 3128

Patent

active

057295557

ABSTRACT:
Disclosed are a method and apparatus suitable for testing an output device, particularly, a laser printer. Definitions of control orders for specifying paper size, etc., graphics orders for specifying the graphics and characters to be printed, and attribute orders for specifying the attributes of the graphics and characters to be printed, are stored in advance along with their frequencies of occurrence. By generating random numbers, orders are selected sequentially from among the thus defined orders with probabilities proportional to the frequencies of occurrence, thereby automatically generating a test pattern which is stored in memory. When testing, the paper size is entered, and coordinates, contained in the test pattern, made to match the standard size are transformed to match the specified paper size and are then supplied to the device under test.

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