The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 24, 2023
Filed:
May. 21, 2021
Axis Ab, Lund, SE;
Johan Jeppsson Karlin, Lund, SE;
Jimmie Jönsson, Lund, SE;
AXIS AB, Lund, SE;
Abstract
The present disclosure relates to a method performed by a deviation analyzing system () for black level drift assessment of a digital camera image sensor (). The deviation analyzing system measures () for pixels of an image captured by the image sensor, a respective luminance value and corresponding chromaticity value of each pixel. The deviation analyzing system further determines () a respective average chromaticity value for differing luminance levels of the measured luminance values, based on for each luminance level averaging the corresponding measured chromaticity values. Moreover, the deviation analyzing system determines (), when the respective average chromaticity values of a range () of luminance levels indicate—to a predeterminable extent—chromaticity deviations () from the respective average chromaticity values () of other luminance levels (), that a black level setting of the image sensor is drifted from a true black level. The disclosure also relates to a deviation analyzing system in accordance with the foregoing, a digital camera comprising such a deviation analyzing system, and a respective corresponding computer program product and non-volatile computer readable storage medium.