Patent ID: 7046289
Filing Date: 2006-05-16
Classification: H04N

Abstract:
1. An automatic focusing device receiving an image signal comprising a plurality of pixels, and performing focusing control of a taking lens, comprising: difference absolute value calculating means for calculating absolute values of differences between pixel data of two pixels in a predetermined positional relationship and included in all or part of an evaluation area of the image signal, and calculating a sum total of the absolute values of the differences obtained for the evaluation area; difference square value calculating means for calculating square values of differences between the pixel data of the two pixels in the evaluation area, and calculating a sum total of the square values of the differences obtained for the evaluation area; evaluation value calculating means for calculating an evaluation value based on the sum total of the absolute values of the differences and the sum total of the square values of the differences; and controlling means for obtaining an in-focus position of the taking lens based on the evaluation value, and driving the taking lens to the in-focus position.