US PATENT SUBCLASS 382 / 287
.~.~ Detecting alignment marks

Current as of: June, 1999
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382 /   HD   IMAGE ANALYSIS

276  DF  IMAGE TRANSFORMATION OR PREPROCESSING {13}
286  DF  .~ Measuring image properties (e.g., length, width, or area) {4}
287.~.~ Detecting alignment marks

DEFINITION

Classification: 382/287

Detecting alignment marks:

(under subclass 286) Subject matter wherein the properties extracted from an image relate to reference marks, sometimes

called fiducials, which are used to measure the image position or orientation and aid in image alignment.

SEE OR SEARCH CLASS

250, Radiant Energy,

557, and 561 for the detection of the position of a coded record, web, strand, strip or sheet.

358, Facsimile,

488, for the detection of the document position in a facsimile system.