Patent ID: 9172864
Filing Date: 2015-10-27
Classification: G02B,G03B,H04N

Abstract:
1. An imaging device that images a subject, the imaging device comprising: a focus lens that collects a light beam from the subject and forms an image of the subject; a drive section that drives the focus lens in optical axis direction; an imaging section that performs photoelectric conversion of the light beam collected by the focus lens and outputs a video signal; a contrast signal generator that extracts a first high-frequency component from the video signal and integrates the first high-frequency component to generate and output a first contrast signal; an auto focus controller that employs the first contrast signal as an evaluation value and moves the focus lens to an in-focus position with wobbling of the focus lens by the drive section; and a histogram signal generator that generates and outputs a histogram signal relating to luminance and a pixel count in the video signal; wherein the auto focus controller varies amplitude of the wobbling of the focus lens based on the histogram signal output by the histogram signal generator.