JP2010156851A5

JP2010156851A5 -

Info

Publication number: JP2010156851A5
Application number: JP2008335228A
Authority: JP
Filing date: 2008-12-26
Publication date: 2012-02-02
Anticipated expiration: 2028-12-26

Description

上記目的を達成するために、本発明の焦点調節装置は、被写体を撮影して画像信号を出力する撮像手段と、前記撮像手段から得られる画像信号に基づいて撮影画面内の特定の被写体を検出する被写体検出手段と、前記被写体検出手段により前記被写体が検出された場合に、前記被写体検出手段により検出された前記被写体の領域を焦点検出領域として設定し、前記被写体検出手段により前記被写体が検出されなかった場合に、予め設定された所定領域を焦点検出領域として設定する設定手段と、前記設定手段により設定された前記焦点検出領域の画像信号から、焦点信号を生成する生成手段と、前記生成手段により生成された前記焦点信号に基づいて焦点調節部材を移動して焦点調節制御を行う焦点調節手段とを有し、前記焦点調節手段は、前記被写体検出手段により前記被写体が検出された状態から、検出されない状態に遷移した場合に、前記所定領域の合焦度が予め設定された閾値よりも高ければ、前記被写体が検出されなくなってから予め設定された時間、前記焦点調節部材を駆動しないように制御する。
また、別の構成によれば、本発明の焦点調節装置は、被写体を撮影して画像信号を出力する撮像手段と、前記撮像手段から得られる画像信号に基づいて撮影画面内の特定の被写体を検出する被写体検出手段と、前記被写体検出手段により前記被写体が検出された場合に、前記被写体検出手段により検出された前記被写体の領域を焦点検出領域として設定し、前記被写体検出手段により前記被写体が検出されなかった場合に、予め設定された所定領域を焦点検出領域として設定する設定手段と、前記設定手段により設定された前記焦点検出領域の画像信号から、焦点信号を生成する生成手段と、前記生成手段により生成された前記焦点信号に基づいて焦点調節部材を移動して焦点調節制御を行う焦点調節手段とを有し、前記焦点調節手段は、前記被写体検出手段により前記被写体が検出された状態から、検出されない状態に遷移した場合に、前記所定領域の合焦度が予め設定された閾値よりも高ければ、前記被写体が検出されなくなってから予め設定された時間、前記所定領域の合焦度が前記閾値以下の場合に比べて、前記焦点調節部材の駆動量及び駆動速度の少なくとも一方を小さくするように制御する。 In order to achieve the above object, the focus adjustment apparatus of the present invention detects an image capturing unit that captures an image of an object and outputs an image signal, and detects a specific object in the image capturing screen based on the image signal obtained from the image capturing unit. a subject detecting means for, when the object is detected by the subject detecting means, the area of the subject detected by the subject detecting means is set as a focus detection area, the object is detected by the object detecting means If no, setting means for setting a preset predetermined regions as the focus detection area from the image signal of the focus detection area set by the setting unit, a generating means for generating a focus signal, the generating means move the focus adjusting member on the basis of the focus signal generated by and a focus adjustment unit that performs focus adjustment control, the focusing means, From serial the subject by the subject detection unit detects the state, when a transition to a state which is not detected, the if the predetermined region of the focus degree is higher than a preset threshold, in advance from the longer the object is detected The focus adjustment member is controlled not to be driven for a set time.
According to another configuration, the focus adjustment apparatus of the present invention captures a specific subject in a shooting screen based on an image pickup unit that picks up a subject and outputs an image signal, and an image signal obtained from the image pickup unit. When the subject is detected by the subject detection means to be detected and the subject detection means, the region of the subject detected by the subject detection means is set as a focus detection region, and the subject is detected by the subject detection means If not, a setting unit that sets a predetermined region set in advance as a focus detection region, a generation unit that generates a focus signal from the image signal of the focus detection region set by the setting unit, and the generation Focusing means for moving the focus adjustment member based on the focus signal generated by the means to perform focus adjustment control, and the focus adjustment means If the subject detection unit makes a transition from a state in which the subject is detected to a state in which the subject is not detected, and if the degree of focus in the predetermined area is higher than a preset threshold, the subject is not detected and is set in advance. Control is performed so that at least one of the drive amount and the drive speed of the focus adjustment member is smaller than the case where the degree of focus in the predetermined area is equal to or less than the threshold value for a given time.

また、本発明の焦点調節方法は、撮影手段が、被写体を撮影して画像信号を出力する撮像工程と、被写体検出手段が、前記撮像工程で得られる画像信号に基づいて撮影画面内の特定の被写体を検出する被写体検出工程と、設定手段が、前記被写体検出工程により前記被写体が検出された場合に、前記被写体検出工程により検出された前記被写体の領域を焦点検出領域として設定し、前記被写体検出工程により前記被写体が検出されなかった場合に、予め設定された所定領域を焦点検出領域として設定する設定工程と、生成手段が、前記設定工程により設定された前記焦点検出領域の画像信号から、焦点信号を生成する生成工程と、焦点調節手段が、前記生成工程により生成された前記焦点信号に基づいて焦点調節部材を移動して焦点調節制御を行う焦点調節工程とを有し、前記焦点調節工程では、前記被写体検出工程により前記被写体が検出された状態から、検出されない状態に遷移した場合に、前記所定領域の合焦度が予め設定された閾値よりも高ければ、前記被写体が検出されなくなってから予め設定された時間、前記焦点調節部材を駆動しないように制御する。
また、別の構成によれば、本発明の焦点調節方法は、撮影手段が、被写体を撮影して画像信号を出力する撮像工程と、被写体検出手段が、前記撮像工程で得られる画像信号に基づいて撮影画面内の特定の被写体を検出する被写体検出工程と、設定手段が、前記被写体検出工程により前記被写体が検出された場合に、前記被写体検出工程により検出された前記被写体の領域を焦点検出領域として設定し、前記被写体検出工程により前記被写体が検出されなかった場合に、予め設定された所定領域を焦点検出領域として設定する設定工程と、生成手段が、前記設定工程により設定された前記焦点検出領域の画像信号から、焦点信号を生成する生成工程と、焦点調節手段が、前記生成工程により生成された前記焦点信号に基づいて焦点調節部材を移動して焦点調節制御を行う焦点調節工程とを有し、前記焦点調節工程では、前記被写体検出工程により前記被写体が検出された状態から、検出されない状態に遷移した場合に、前記所定領域の合焦度が予め設定された閾値よりも高ければ、前記被写体が検出されなくなってから予め設定された時間、前記所定領域の合焦度が前記閾値以下の場合に比べて、前記焦点調節部材の駆動量及び駆動速度の少なくとも一方を小さくするように制御する。 The focal adjustment method of the present invention, imaging means, and imaging step of outputting an image signal by photographing a subject, a subject detecting means, the identification of the shooting screen based on the image signal obtained by the imaging step a subject detection step of detecting an object, the setting means, wherein when the subject is detected by subject detection process, to set the region of the subject detected by the subject detection step as the focus detection area, the object detection if the object is not detected by step, a setting step of setting a predetermined upper regions as the focus detection area, the generation means, from the image signal of the focus detection area set by the setting step, the focus a generation step of generating a signal, the focusing means, the moving focusing control focusing member on the basis of the focus signal generated by the generating step And a focus adjustment step of performing, in the focus adjusting process, the state of the object by the object detection step is detected, if a transition is made to state not detected, degree of focus of the predetermined region is set in advance If it is higher than the threshold value , control is performed so that the focus adjustment member is not driven for a preset time after the subject is no longer detected.
According to another configuration, the focus adjustment method of the present invention is based on the imaging process in which the imaging unit captures the subject and outputs an image signal, and the subject detection unit is based on the image signal obtained in the imaging step. A subject detection step for detecting a specific subject in the shooting screen; and a setting unit that detects the subject region detected by the subject detection step when the subject is detected by the subject detection step. And when the subject is not detected by the subject detection step, a setting step for setting a predetermined region set in advance as a focus detection region and the focus detection unit set by the setting step A generation step of generating a focus signal from the image signal of the region, and a focus adjustment unit moves the focus adjustment member based on the focus signal generated by the generation step. A focus adjustment step for performing focus adjustment control, and in the focus adjustment step, when the subject is detected by the subject detection step and transitions to a state where the subject is not detected, the focus of the predetermined region is adjusted. If the degree is higher than a preset threshold, the driving amount of the focus adjustment member is longer than a case where the focus degree of the predetermined area is equal to or less than the threshold for a preset time after the subject is not detected. And at least one of the driving speeds is controlled to be small.

Claims

Imaging means for photographing a subject and outputting an image signal;
Subject detection means for detecting a specific subject in a shooting screen based on an image signal obtained from the imaging means;
If the object is detected by the subject detecting means, the area of the subject detected by the subject detecting means is set as a focus detection area, when the object is not detected by the subject detecting means, advance Setting means for setting the set predetermined area as a focus detection area;
From the image signal of the focus detection area set by the setting unit, a generating means for generating a focus signal,
And a focus adjustment unit that performs focus adjustment control to move the focusing member on the basis of the focus signal generated by said generating means,
It said focusing means from a state in which the object using said object detection means is detected, when a transition to a state that is not detected, is higher than the threshold focus degree is set in advance of the predetermined region, wherein the subject is A focus adjusting apparatus, wherein the focus adjusting member is controlled not to be driven for a preset time after it is not detected.

Imaging means for photographing a subject and outputting an image signal;
Subject detection means for detecting a specific subject in a shooting screen based on an image signal obtained from the imaging means;
When the subject is detected by the subject detection unit, the region of the subject detected by the subject detection unit is set as a focus detection region, and when the subject is not detected by the subject detection unit, Setting means for setting the set predetermined area as a focus detection area;
Generating means for generating a focus signal from the image signal of the focus detection area set by the setting means;
Focus adjusting means for performing focus adjustment control by moving a focus adjusting member based on the focus signal generated by the generating means;
It said focusing means from a state in which the object using said object detection means is detected, when a transition to a state that is not detected, is higher than the threshold focus degree is set in advance of the predetermined region, wherein the subject is Control is performed so that at least one of the drive amount and the drive speed of the focus adjustment member is reduced compared to a case where the degree of focus in the predetermined area is equal to or less than the threshold value for a preset time after detection is stopped. you wherein focus point adjuster.

It said focusing means from a state in which the subject is detected by the object detection unit, when a transition to a state that is not detected, the higher the focusing degree of the predetermined area, smaller the moving amount of the focus adjusting member The focus adjustment apparatus according to claim 2 , wherein control is performed as follows.

It said focusing means from a state in which the subject is detected by the object detection unit, when a transition to a state that is not detected, the higher the focusing degree of the predetermined area, the driving speed of said focusing member is slower focusing device according to claim 2 or 3, wherein the controller controls so.

An imaging process in which the imaging means images the subject and outputs an image signal;
A subject detection step in which a subject detection means detects a specific subject in the shooting screen based on the image signal obtained in the imaging step;
Setting means, when the object is detected by the subject detection step, an area of the subject detected by the subject detection step is set as the focus detection area, the object is not detected by the subject detection step A setting step of setting a predetermined area set in advance as a focus detection area,
Generating means, the image signal of the focus detection area set by the setting step, a generation step of generating a focus signal,
The focusing means, and a focus adjustment step of performing focus adjustment control to move the focusing member on the basis of the focus signal generated by said generating step,
In the focusing step, the state of the object by the object detection step is detected, if a transition is made to state undetected, higher than the threshold focus degree is set in advance of the predetermined region, wherein the subject is A focus adjustment method, wherein control is performed so that the focus adjustment member is not driven for a preset time after detection is stopped.

  An imaging process in which the imaging means images the subject and outputs an image signal;
  A subject detection step in which a subject detection means detects a specific subject in the shooting screen based on the image signal obtained in the imaging step;
  When the subject is detected by the subject detection step, the setting unit sets the region of the subject detected by the subject detection step as a focus detection region, and the subject is not detected by the subject detection step. A setting step of setting a predetermined area set in advance as a focus detection area,
  A generating step for generating a focus signal from the image signal of the focus detection area set by the setting step;
  A focus adjustment unit having a focus adjustment step of performing focus adjustment control by moving a focus adjustment member based on the focus signal generated by the generation step;
  In the focus adjustment step, when the focus detection in the predetermined area is higher than a preset threshold when the subject is detected in the subject detection step and transitions to a non-detection state, the subject is Control is performed so that at least one of the drive amount and the drive speed of the focus adjustment member is reduced compared to a case where the degree of focus in the predetermined area is equal to or less than the threshold value for a preset time after detection is stopped. A focusing method characterized.

The program for making a computer perform each process of the focus adjustment method of Claim 5 or 6.

A computer-readable storage medium storing the program according to claim 7.