Image capture apparatus and control method thereof

Abstract

An image capture apparatus and the control method thereof is provided. The image capture apparatus comprises a photometry unit, which performs photometry of luminance in each of the photometry areas in an image sensing screen, a photometry mode judgment unit, which judges a photometry mode, a filter operation unit, which performs an operation on a luminance value of a photometry area by taking into account luminance values of photometry areas around the photometry area, and an exposure value determination unit, which determines an exposure value without using a result of the operation by the filter operation unit when the photometry mode judgment unit judges that the photometry mode is a first photometry mode, and when the photometry mode judgment unit judges that the photometry mode is a second photometry mode, determines the exposure value by performing an operation in accordance with the second photometry mode after the operation performed by the filter operation unit.

Description

technical field [0001] The present invention relates to an imaging device that divides a shooting screen into a plurality of photometry areas to measure the brightness of a subject in each photometry area and a control method thereof. Background technique [0002] Japanese Patent Application Laid-Open No. H03-223821 proposes the following imaging device. [0003] First, the subject area (or shooting screen) is divided into a plurality of light metering areas, and the brightness of each area is detected. According to a selection of focus detection areas detected at a plurality of points of the subject area, grouping the plurality of light metering areas into concentric circle groups surrounding the focus detection area, and by changing the weight of the average brightness of the grouped areas , to calculate the light metering value (or brightness value) of the entire photographed area. The camera is designed to perform high-precision photometry in this way. [0004] will r...

AI Technical Summary

Problems solved by technology

If the sensitivity distribution is set in this way, it will instead lead to the problem that in the case of estimated metering mode, the change in exposure increases when there is a small change in the framing of the subject area, which makes the camera difficult to use

[0012] However, since the area sensor is a charge accumulation type sensor, this sensor has a problem of responsiveness to low brightness, and using this area sensor is not a good solution

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