Line follower

Details Line follower Line follower

1981-06-29

1983-01-11

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

3401463AE, 3401463MA, 358260, 364515, G09G 100

Patent

active

043684629

ABSTRACT:
An apparatus and method for providing a digital representation of graphic information on a document wherein the document has been scanned and a signal representative of the graphic information at progressive pixel points on the document has been generated, including storing the signal representative of the graphic information in a memory device through an input path, retrieving the signal representative of the graphic information and feeding the signal through the input path and back to the memory device, providing serial processing and data analysis to the signal representative of the graphic information on a reiterative basis as the signal is repeatedly stored and retrieved and with the serial processing and data analysis including providing pixel arrays from pluralities of adjacent pixels and providing data reduction to center elements when the pixel arrays have desired characteristics and with all of the graphic information in the signal reduced to center elements in accordance with the pixel arrays and with surviving pixels which are not part of an array stored and an attribute representative of the level of survival also stored with the surviving pixels, repeating the above on a reiterative basis using the surviving center elements from the previous step to form the pixel arrays until there are no more surviving pixel arrays so that the stored surviving pixels and their attributes represent the centroids of the lines of the graphic document and the attributes represent the thickness of the lines, and providing pixel arrays from the stored surviving pixels and comparing the pixel arrays with fixed criteria for providing gap filling and elimination of undesired pixels.

REFERENCES:
patent: 4034344 (1977-07-01), Saraga et al.
patent: 4155097 (1979-05-01), Lux
patent: 4174514 (1979-11-01), Sternberg
patent: 4179684 (1979-12-01), Cheng
patent: 4189748 (1980-02-01), Reis

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