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Methods to compensate manufacturing variations and design imperfections in a capsule camera

  • US 8,405,711 B2
  • Filed: 10/29/2007
  • Issued: 03/26/2013
  • Est. Priority Date: 01/09/2007
  • Status: Active Grant
First Claim
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1. A method for characterizing a camera with a transparent housing and a light source within the transparent housing, wherein the camera comprises an optical system and image sensor having pixels within a field of view of the optical system and pixels outside of the field of view of the optical system, comprising:

  • placing the camera inside a light absorption environment so that no substantial reflected light falls on the optical system, and taking a first plurality of exposures using both the pixels within the field of view of the optical system and the pixels outside of the field of view of the optical system;

    placing the camera within a field-dependent reflectance environment, and taking a second plurality of exposures using both the pixels within the field of view of the optical system and the pixels outside of the field of view of the optical system; and

    processing the first and second pluralities of exposures to extract parameter values of a model for images to be taken with the camera; and

    based on the parameter values, compensating images captured by the camera after the images are captured.

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