Patent ID: 6839085
Filing Date: 2005-01-04
Classification: H04N

Abstract:
1. A method of controlling an image apparatus having a light-receiving section and a light-blocking section comprising the steps of: receiving light from an object by the light-receiving section to generate a plurality of analog video signals for a first field period; blocking the light by the light-blocking section to generate reference signals for each analog video signal; converting the analog video signals into digital video signals; accumulating the reference signals for each digital video signal to generate a first accumulated signal; averaging the first accumulated signal to generate a first average signal; accumulating the first average signal for all the video signals for a second field that follows the first field period to generate a second accumulated signal; averaging the second accumulated signal to generate a second average signal; and adjusting a reference level of each digital video signal based on the second average signal so that the difference between the digital video signals and the second average signal becomes zero.