Isopleth generator for applying isopleths to digital picture data and method therefor
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United States of America Patent
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Nov 22, 1994
Grant Date -
N/A
app pub date -
Jul 16, 1991
filing date -
Jul 16, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for adding isopleths to image data includes an input device for sequentially inputting image data to be displayed on an image screen of a display device, a horizontal delay circuit for delaying the inputted data by one horizontal scanning period, a column comparator for comparing the inputted data, that is, a sample, with a delayed sample from the horizontal delay circuit to thereby generate a signal indicating a sample to be converted into isopleth data, a sample delay circuit for delaying the sample outputted from the horizontal delay circuit by one sampling period, a row comparator for comparing the sample outputted from the horizontal delay circuit with the sample outputted from the sample delay circuit to thereby generate a signal indicating a sample to be converted into isopleth data, and an isoplete data generator responsive to the output of the column and row comparators for replacing the indicated input sample by predetermined distinguishable data and for outputting the predetermined distinguishable data to the display device.
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Cited Art Landscape
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