CORRECTING DISTURBANCE IN A PIXEL SIGNAL INTRODUCED BY SIGNAL FILTERING IN A DIGITAL CAMERA
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United States of America Patent
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Nov 9, 2017
app pub date -
May 9, 2016
filing date -
May 9, 2016
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Abstract
A camera is configured with a disturbance correction engine that identifies and corrects disturbance introduced in image data when a filter is applied to the image data. The disturbance may take the form of overshoot noise, crosstalk noise, and/or low pass band energy. The disturbance correction engine determines an amount of energy deficit in the pass band and compensates for the deficit using the increase in energy in the side band. In operation, the disturbance correction engine processes the filtered image data in the frequency domain to adjust the amplitudes of the image coefficients. The adjusted image coefficients compensate for the deficit of energy in the pass band and also correct the disturbance caused by the overshoot and the crosstalk.
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