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Method for processing an image signal for double or multiple exposure cameras

  • US 8,390,701 B2
  • Filed: 04/29/2010
  • Issued: 03/05/2013
  • Est. Priority Date: 04/29/2010
  • Status: Active Grant
First Claim
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1. A method for processing an image signal for double or multiple exposure cameras, the method comprising:

  • determining whether fluorescent light is present;

    if so, ascertaining the period of the fluorescent light;

    forming a plurality of image signals having different exposure conditions with at least one image pickup sensor, such that at least a long exposure time is made equal to a multiple of the fluorescent light period, and a short exposure time is made equal to a fraction of the long exposure time;

    correcting at least part of the plurality of image signals with a correction function in order to obtain a corrected output signal;

    combining at least one of said plurality of image signals and said corrected output signal to form a combined image signal; and

    applying a gain factor G to the combined image signal, so that at least some image areas are shifted out of a display range.

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