A method for reducing noise in an image especially provided by an image sensor for correcting a defect

摘要

This paper corrects defects appearing in images taking into account the temperature and integration time of image sensors.Solution: the image of the object to be corrected photographed by the image sensor, the temperature of the image sensor acquired when the image to be corrected is taken, and the applied integration time are received.The noise correction factor inherent to the pixel is subtracted from the pixel values of the pixels PX [I, J] to correct the defects.The noise correction factor BM [I, J] is an expression: BM [I, J] = it × Ad [I, J] × Exp (BD [I, J] × TP) + AB [I, J] × It is defined by TP + BB [I, J], it is an integration time, TP is the temperature of the image sensor, exp is an exponential function, ad [I, J], BD [I, J], AB [I, J] and BB [I, J] are coefficients inherent to pixels.Diagram