29-07-2021 дата публикации
Номер: US20210235032A1
Принадлежит:
A method of correcting defects appearing in an image produced by an image sensor, the method comprising: receiving an image to be corrected, taken by the image sensor, receiving a temperature from the image sensor, acquired when the image to be corrected is taken by the image sensor, receiving an integration time applied by the image sensor when taking the image to be corrected, and for each pixel of the image to be corrected, subtracting from the pixel value a pixel-specific noise correction factor derived from a noise reduction model comprising a linear component dependent on the temperature of the image sensor, added to an exponential component depending on the temperature of the image sensor and multiplied by the integration time, the linear and exponential components depending on coefficients specific to the pixel. 1. A method of correcting defects appearing in an image produced by an image sensor , the method comprising:receiving an image to be corrected, taken by the image sensor;receiving a temperature from the image sensor, acquired when the image to be corrected is taken by the image sensor;receiving an integration time applied by the image sensor when taking the image to be corrected; andfor each pixel of the image to be corrected, subtracting from a pixel value a pixel-specific noise correction factor derived from a noise reduction model comprising a linear component dependent on a temperature of the image sensor, added to an exponential component depending on the temperature of the image sensor and multiplied by the integration time, the linear and exponential components depending on coefficients specific to the pixel.2. The method according to claim 1 , wherein the noise reduction model is defined by the following equation:{'br': None, 'i': bm', 'i,j', 'ad', 'i,j', 'bd', 'i,j', 'TP', 'ab', 'i,j', 'TP+bb', 'i,j, '[]=IT×[]×Exp([]×)+[]×[]'}where bm[i,j] is the noise correction factor to be subtracted from a corresponding pixel of the image to be corrected ...
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