Boots – shoes – and leggings
Patent
1977-11-21
1980-01-01
Gruber, Felix D.
Boots, shoes, and leggings
178 19, 340709, 364561, G08C 2100
Patent
active
041819527
ABSTRACT:
There is disclosed a method and means for increasing the positional accuracy of operator controlled cursors engaged in the digitized encoding of graphic information such as line drawings. The method steps comprise those of digitizing the instantaneous contact position between the cursor and the data entry surface as reference coordinates; detecting any segment of a colored object upon the surface within a predetermined area about the cursor; ascertaining the location within the area of the centroid or the like of the detected segment; and digitizing said ascertained location as a displacement from the reference coordinates. Apparatus for practicing the method comprises an independently actuable cursor formed from a position encoder and an image scanner, the scanner generating a Boolean coded array of points counterpart to a preselected surface area. The scanned array is first buffered and then used to actuate an operator viewable LED display of the scanned array on one hand and said array is sent to a CPU on the other hand. In turn, the CPU calculates the coordinates of the centroid of that array area of contiguous points having the same designated Boolean (color) 0 or 1 value. Signals representing the calculated coordinates generated by the CPU then cause the LED display to differentially indicate the calculated centroid location to the operator such as by way of a flashing display element.
REFERENCES:
patent: 3832693 (1974-08-01), Ishizaki et al.
patent: 3967266 (1976-06-01), Roy
patent: 3974493 (1976-08-01), De Cavaignac et al.
patent: 4080515 (1978-03-01), Anderson
patent: 4101879 (1978-07-01), Kawaji et al.
patent: 4138592 (1979-02-01), Capehart et al.
Casey Richard G.
Langdon, Jr. Glen G.
Mantey Patrick E.
Williams Robin
Brodie R. B.
Gruber Felix D.
International Business Machines - Corporation
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