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Image pickup apparatus with flash band compensation technique, control method therefor, and storage medium

  • US 10,511,792 B2
  • Filed: 04/10/2018
  • Issued: 12/17/2019
  • Est. Priority Date: 06/13/2016
  • Status: Active Grant
First Claim
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1. An image pickup apparatus comprising:

  • a lens unit configured to have a zoom function;

    an image pickup device configured to sequentially start exposure and sequentially read out signals for each row of pixels;

    a signal processing unit configured to generate image information based on image signals output from the image pickup device;

    a storage unit configured to hold, in a memory unit, the image information generated by the signal processing unit;

    a detection unit configured to, based on the image information held in the memory unit, detect a flash band that is caused by an external flash and extending across a plurality of frames;

    a correction unit configured to correct the frames in which the flash band was detected by the detection unit to an image having less different levels of luminance; and

    a calculation unit configured to calculate a zoom change ratio of the lens unit,wherein the correction unit corrects the frames according to the zoom change ratio when the calculated zoom change ratio does not fall inside a first range determined in advance.

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