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:
Apr. 08, 2025
Filed:
Jun. 09, 2022
Canon Kabushiki Kaisha, Tokyo, JP;
Yasuo Fukuda, Tokyo, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
Pixel values are read out of an OB pixel region under a predetermined exposure condition, and predetermined processing is performed on the pixel values to derive a dark current component value. The dark current component value of a segmented pixel region is estimated from the OB dark current component value by taking into account the difference between the exposure conditions of the OB pixel region and the segmented pixel region. Specifically, a conversion ratio for calculating the dark current component value from the OB dark current component value is derived based on the ratios between exposure time and gain in the exposure conditions of the two pixel regions. This conversion ratio is applied to the pixel values of the OB pixel region or the OB dark current component value calculated from them to thereby calculate an estimated dark current component value for the exposure condition of the segmented pixel region.