2-D encoded symbol quality assessment
AssigneeMicroscan Systems, Inc.
InventorRichard G. Long
Life of this patent
Estimating the term…
Abstract
An 2-D symbol orientation guide with parallel and spaced right angle guidelines with chevron-like spaces provided therebetween is selectively displayed in plural selected dispositions on a monitor screen as an overlay for the display on the same monitor screen of a 2-D Data Matrix symbol. Manual rotation of the symbol is viewed on the monitor screen as the symbols solid line border is moved into alignment with a guide line at which time the symbol is imaged and its quality graded. Display of the orientation guide in at least five selected rotational dispositions, alignment of the symbol solid line border therewith and imaging and grading of the symbol quality in each such position provides multiple grade scores for averaging into an overall grade score.
Claims22
A method to determine the quality of an encoded optical symbol, the method comprising:
- using a camera having an optical axis and including a light-sensitive array:
- positioning the optical symbol within the field of view of the camera,
- rotating the optical symbol to a plurality of rotational dispositions of the optical symbol around the optical axis of the camera relative to the light-sensitive array, and
- capturing an image of the entire optical symbol at each of the plurality of rotational dispositions;
- and
- using a processor coupled to the light-sensitive array:
- processing each image of the optical symbol to determine a plurality of quality scores of the optical symbol, each quality score corresponding to one of the rotational dispositions, and
- averaging the plurality of quality scores.
An apparatus comprising:
- a camera having an optical axis and including a light sensitive array;
- and
- a processor coupled to the camera, the processor including logic to cause the processor to:
- receive from the camera a plurality of images of an entire encoded optical symbol, each image of the optical symbol captured at a different rotational disposition of the optical symbol around the optical axis relative to the light-sensitive array,
- process the plurality of images of the optical symbol to determine a plurality of quality scores of the optical symbol, each quality score corresponding to one of the plurality of rotational dispositions of the optical symbol, and
- average the plurality of quality scores.
Dependencies are inferred from the claim text.