Image pickup apparatus that carries out noise compensation, control method therefor, and storage medium

Patent metadata

Field	Value
Publication number	US-9013597-B2
Application number	US-201213554420-A
Country	US
Kind code	B2
Filing date	Jul 20, 2012
Priority date	Aug 26, 2011
Publication date	Apr 21, 2015
Grant date	Apr 21, 2015

Abstract

An image pickup apparatus which is capable of accurately compensating for noise even when images are continuously taken at varying exposures. First and second image signals corresponding to the first and second exposures are output. The first and second image signals are subjected to a noise compensation process and then synthesized together to obtain a composite image signal. Data obtained in the first and second image signals when the noise compensation process was carried out on the first and second image signal is inherited, and a noise compensation process on the next first and second signals is carried out based on the data.

First claim

What is claimed is:

1. An image pickup apparatus having an image pickup device that obtains an image signal, comprising:
an exposure control unit configured to make the image pickup device output first and second image signals corresponding to the first and second exposures differing from each other;
a compensation processing unit configured to perform a noise compensation process on the first and second image signals; and
a synthesizing unit configured to synthesize the first…

Assignees

• Okubo Toshiyuki
• Canon Kk

Inventors

• Okubo Toshiyuki

Classifications

• G06T2200/21

  Physics · mapped topic

• H04N23/741 Primary

  Electricity · mapped topic

• G06T5/50

  Physics · mapped topic

• G06T2207/20221

  Physics · mapped topic

• G06T2207/10144

  Physics · mapped topic