Accurate measurement of spatial noise portraits of photosensors of digital cameras

5th International Conference of Photonics and Information Optics

Cheremkhin, P.A.^1 ; Evtikhiev, N.N.^1 ; Krasnov, V.V.^1 ; Kulakov, M.N.^1 ; Starikov, R.S.^1

National Research Nuclear University MEPhI, Moscow Engineering Physics Institute, Kashirskoe shosse 31, Moscow

115409, Russia^1

关键词: Accurate measurement;    Dark signal non uniformities;    Photo-sensors;    Photoresponses;    Photosensor;    Spatial noise;    Spatially homogeneous;    Temporal noise;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/737/1/012066/pdf
DOI  :  10.1088/1742-6596/737/1/012066

来源: IOP

【 摘 要 】

Method of measurement of accurate portraits of light and dark spatial noise of photosensors is described. The method consists of four steps: creation of spatially homogeneous illumination; shooting light and dark frames; digital processing and filtering. Unlike standard technique, this method uses iterative creation of spatially homogeneous illumination by display, compensation of photosensor dark spatial noise portrait and improved procedure of elimination of dark temporal noise. Portraits of light and dark spatial noise of photosensors of a scientific digital camera were found. Characteristics of the measured portraits were compared with values of photo response and dark signal non-uniformities of camera's photosensor.