Device and method for reducing the amplitude range of signals representing an image
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United States of America Patent
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Dec 8, 1987
Grant Date -
N/A
app pub date -
Jan 8, 1986
filing date -
Jan 8, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An embodiment of the device comprises: three subtracters, three multipliers and a correction coefficient determination device. The subtracters and multipliers make it possible to obtain three signals, whose values are multiplied by a same coefficient, in order that they retain the same ratios as the values of the signals supplied to the input of the device. The device for determining a correction coefficient comprises means for determining which of the input signals has the highest instantaneous value at each time, in order to apply thereto a predetermined, non-linear transformation and for supplying a correction signal which is applied to the multipliers.
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