×

Automatic backlight compensation and exposure control

  • US 7,545,435 B2
  • Filed: 04/15/2005
  • Issued: 06/09/2009
  • Est. Priority Date: 10/15/2004
  • Status: Active Grant
First Claim
Patent Images

1. A method for exposure control for an image, comprising:

  • electronics calculating a skew of the luminance values of at least a portion of the image;

    if the skew is above a predetermined value, calculating a predicted peak value according to a first formula;

    if the skew is not above a predetermined value, calculating the predicted peak value according to a second formula;

    if the predicted peak value is less than a predetermined low predicted peak value, increasing an exposure of the image; and

    if the predicted peak value is more than a predetermined high predicted peak value, decreasing the exposure of the image.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×