Recognizing dataforms in image areas

Details Recognizing dataforms in image areas Recognizing dataforms in image areas

1994-06-15

1999-06-29

Couso, Jose L.

Image analysis

Pattern recognition

Feature extraction

G06K 946

Patent

active

059179457

ABSTRACT:
Dataforms, such as bar codes and matrix codes, are recognized by analysis of histogram type data derived for a plurality of window sections of an image area. Typically, an image area 512 pixels high by 480 pixels wide is divided into 240 window areas, each including 1024 pixels in a 32 by 32 pixel square. A histogram for a window section overlying a portion of the dataform may typically exhibit two peaks representing the two principal reflective values (black and white, for example) of the elements and spaces of a dataform. A background (quiet zone) window section histogram exhibits one principal peak representing the background value (white, for example). The background window sections and the dataform window sections are assigned to two different groups. One or both groups are then used for one or more of the following: recognizing the presence of a dataform; determining whether the dataform is darker or lighter than the background; and locating the dataform within the image area. Also, a single histogram is used to identify the type of dataform, based upon the histogram signature of the dataform.

REFERENCES:
patent: 5134272 (1992-07-01), Tsuchiya et al.
patent: 5155343 (1992-10-01), Chandler et al.
patent: 5268580 (1993-12-01), He

Affiliated with

Also associated with

Rating

Recognizing dataforms in image areas does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Recognizing dataforms in image areas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recognizing dataforms in image areas will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1383727