Patent ID: 9148597
Filing Date: 2015-09-29
Classification: H04N

Abstract:
1. A method for measuring an electron multiplication factor in an imaging device including an electron multiplying image pickup device having a light receiving section and an optical black section, the method comprising: acquiring a multiplied image at a predetermined electron multiplication factor set in advance using the light receiving section and the optical black section; calculating a first luminance average value and a first luminance variance average value of pixels corresponding to the light receiving section in the multiplied image; calculating a second luminance average value and a second luminance variance average value of pixels corresponding to the optical black section in the multiplied image; calculating a conversion factor of the multiplied image based on the first luminance average value, the first luminance variance average value, the second luminance average value and the second luminance variance average value; and obtaining the electron multiplication factor of the multiplied image based on a ratio between a conversion factor at a reference electron multiplication factor and the calculated conversion factor.