Patent ID: 9444992
Filing Date: 2016-09-13
CPC Classification: H04N

Claim Text:
1. An imaging apparatus that performs focus control, the imaging apparatus comprising: a contrast signal generator that divides a captured image screen into a plurality of areas, extracts a frequency component based on a video signal for each of the divided areas, and generates a first contrast signal based on the frequency component; and a controller that extracts a luminance intensity based on the video signal for each of the divided areas, determines the sum of the luminance intensities in an arbitrary number of the plurality of the divided areas, determines, for each of the divided areas of the arbitrary number of the plurality of divided areas, a quotient of the sum divided by the luminance intensity in a divided area of the arbitrary number of the plurality of divided areas, determines, for each of the arbitrary number of the plurality of divided areas, a second contrast signal generated by multiplying the first contrast signal in the divided area by the quotient, determines a lens position evaluation value that is the sum of the second contrast signals, and performs the focus control based on the lens position evaluation value.