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Imaging apparatus and control method thereof

A technology of camera device and control method, applied in the direction of focusing device, installation, image communication, etc.

Inactive Publication Date: 2013-11-27
CANON KK
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] This is because, when the position of the subject changes, the AF frame may move away from the subject

Method used

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  • Imaging apparatus and control method thereof
  • Imaging apparatus and control method thereof
  • Imaging apparatus and control method thereof

Examples

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Embodiment Construction

[0019] Various exemplary embodiments, features, and aspects of the invention will be described in detail below with reference to the accompanying drawings.

[0020] figure 1 is a block diagram illustrating a configuration example of the imaging device 100 according to the exemplary embodiment of the present invention. exist figure 1 Among them, the photographic lens 101 includes a zoom mechanism. The focus lens 102 performs focus adjustment to be described below for adjusting the focus on the image sensor. The AF processing unit 103 drives the focus lens 102 . The image sensor 104 performs photoelectric conversion for converting an object image incident via the focus lens 102 into an electrical signal to acquire image data. An analog-to-digital (A / D) conversion unit 105 includes a correlated double sampling (CDS, correlated double sampling) circuit for removing output noise on the image sensor 104 and a non-linear amplifier circuit performed before A / D conversion.

[0021...

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Abstract

An apparatus includes an imaging unit configured to photoelectrically convert an object image incident via a focus lens to acquire image data; a detection unit configured to detect a size and a position of an object based on the acquired image data; an adjustment unit configured to execute focus adjustment by acquiring a focus signal indicating a focusing state of the focus lens based on the image data while moving the focus lens, and moving the focus lens based on the focus signal; and a control unit configured to execute an operation if the detected size has changed, and to change the operation if the detected position has changed while the detected size has not changed.

Description

technical field [0001] The present invention relates to an imaging device and a control method of the imaging device, in particular to a technology suitable for adjusting the focus while waiting for shooting. Background technique [0002] Conventionally, in electronic still cameras, video cameras, etc., when autofocus (hereinafter referred to as AF) is performed, a method is used in which a high-frequency component ( The lens position at which the AF evaluation value is hereinafter referred to as the maximum is determined as the in-focus position. As one of these methods, the following scanning method is known. [0003] In the first scanning method, while the focus lens is driven over the entire scanning range, an AF evaluation value obtained from a predetermined area (hereinafter referred to as an AF frame) in the image sensor is stored. Then, the focus lens position corresponding to the maximum value among the stored AF evaluation values ​​(hereinafter referred to as the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B13/36H04N5/232
CPCG03B13/36H04N5/23212G02B7/36H04N23/673
Inventor 芝上玄志郎
Owner CANON KK
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