JP2013016926A5

JP2013016926A5 -

Info

Publication number: JP2013016926A5
Application number: JP2011146750A
Authority: JP
Filing date: 2011-06-30
Publication date: 2014-08-14
Anticipated expiration: 2031-06-30

Description

請求項１に記載の発明は、被写界を複数の領域に分割して測光する測光、前記測光部による測光結果に基づいて第１の露出値を演算する第１露出演算部と、前記測光結果に基づいて第１の露出値に対して被写体の明部を復元するための補正量を演算する補正量演算部と、前記測光結果に基づいて主要被写体を検出する主要被写体検出部と、前記主要被写体の輝度を演算する主要被写体輝度演算部と、前記主要被写体の輝度に基づいて前記補正量を制限する補正量制限部と、前記制限された補正量に基づいて前記第１の露出値を補正した第２の露出値を演算する第２露出演算部と、前記第２の露出値に基づいて被写体を撮像して画像データを生成する撮像部と、を備える撮像装置である。
請求項２に記載の発明は、請求項１に記載の撮像装置において、補正量制限部は、前記検出した主要被写体の大きさに基づいて前記補正量を制限すること、を特徴とする撮像装置である。
請求項３に記載の発明は、請求項２に記載の撮像装置において、前記主要被写体が大きいほど、前記制限が大きいこと、を特徴とする撮像装置である。
請求項４に記載の発明は、請求項２又は３に記載の撮像装置において、前記補正量制限部は、前記検出した主要被写体の大きさを、前記画像データの画像の寸法に基づいて規格化すること、を特徴とする撮像装置である。
請求項５に記載の発明は、請求項２から４のいずれか１項に記載の撮像装置において、前記補正量が制限値以上の場合、前記制限された補正量を前記制限値とすること、を特徴とする撮像装置である。
請求項６に記載の発明は、請求項５に記載の撮像装置において、前記制限値は、前記第１の露出値から顔のアンダー許容量を引いたものを、主要被写体の代表輝度から引いた値であること、を特徴とする撮像装置である。
請求項７に記載の発明は、被写界の測光結果に基づいて第１の露出値を演算する第１露出演算部と、前記第１の露出値の補正量を演算する補正量演算部と、主要被写体の輝度を演算する主要被写体輝度演算部と、前記主要被写体の輝度に基づいて前記補正量を制限する補正量制限部と、前記制限された補正量に基づいて前記第１の露出値を補正した第２の露出値を演算する第２露出演算部と、前記第２の露出値に基づいて被写体を撮像して画像データを生成する撮像部とを備える撮像装置である。
請求項８に記載の発明は、請求項1から７のいずれか１項に記載の撮影装置であって、前記画像データの暗部を明るくするように階調を補正する画像処理部を更に備える撮像装置である。
請求項９に記載の発明は、請求項１から８のいずれか１項に記載の撮像装置と、前記画像データの暗部を明るくするように階調を補正する画像処理装置と、を備える撮像システムである。
請求項１０に記載の発明は、被写界を複数の領域に分割して測光し、前記測光結果に基づいて第１の露出値を演算し、前記測光の結果に基づいて第１の露出値に対して被写体の明部を復元するための補正量を演算し、前記測光の結果に基づいて主要被写体を検出し、検出された前記主要被写体の輝度を演算し、前記主要被写体の輝度に基づいて前記補正量を制限し、前記制限された補正量に基づいて前記第１の露出値を補正した第２の露出値を演算し、前記第２の露出値に基づいて被写体を撮像して画像データを生成する撮像方法である。 The invention of claim 1 includes a first exposure calculator for calculating photometry photometry by dividing the object field into a plurality of regions, the first exposure value on the basis of the result of photometry by the photometric part, the a correction amount calculation unit for calculating a correction amount for restoring the bright part of the object for the first exposure value on the basis of the result of photometry, and the main subject detection unit for detecting a main subject on the basis of the result of photometry, a main subject luminance calculator for calculating a bright degree of the main object, the main object and correction amount limiting unit for limiting the correction amount based on brightness, the first based on the limited correction amount is the imaging equipment; and a imaging unit that generates image data by imaging a subject based on the second exposure calculator for calculating a second exposure value obtained by correcting the exposure value, the second exposure value .
The invention according to claim 2, Oite the imaging equipment according to claim 1, the correction amount limiting unit includes a characterized, limiting the correction amount based on the size of the main object and the detected which is an imaging equipment to.
The invention according to claim 3, Oite the imaging equipment according to claim 2, as the main subject is large, the possible limit is large, an imaging equipment, characterized in.
The invention according to claim 4, Oite the imaging equipment according to claim 2 or 3, wherein the correction amount limiting unit, the size of the main object and the detected, based on the dimensions of the image of the image data it is normalized Te, an imaging equipment, characterized in.
The invention according to claim 5, Oite the imaging equipment according to any one of claims 2 4, wherein when the correction amount is on the limit Ne以, the limited correction amount the limiting value it is an imaging equipment, characterized in.
The invention described in claim 6, Oite the imaging equipment according to claim 5, wherein the limit value, a minus under allowance of the first exposure value or al face, representative of the main subject it is Brightness or et minus, an imaging equipment, characterized in.
The invention according to claim 7 is a first exposure calculation unit that calculates a first exposure value based on a photometric result of an object scene, and a correction amount calculation unit that calculates a correction amount of the first exposure value. A main subject luminance calculation unit for calculating the luminance of the main subject, a correction amount limiting unit for limiting the correction amount based on the luminance of the main subject, and the first exposure value based on the limited correction amount An image pickup apparatus comprising: a second exposure calculation unit that calculates a second exposure value that corrects the image, and an image pickup unit that captures an image of a subject based on the second exposure value and generates image data.
The invention according to claim 8 is the imaging apparatus according to any one of claims 1 to 7 , further comprising an image processing unit that corrects a gradation so as to brighten a dark part of the image data. it is the equipment.
Imaging invention described in claim 9, comprising an imaging equipment according to any one of claims 1 to 8, and an image processing apparatus for correcting a gradation so as to brighten the dark portion of the image data System.
The invention according to claim 10 divides the object field into a plurality of areas and photometering, calculates a first exposure value on the basis of the result of photometry, the first exposure value based on the result of the photometry for the calculated correction amount for restoring the bright part of the object, detecting a main subject based on the result of the photometry, and calculating the Brightness of said detected main object, Brightness of the main subject wherein limiting the correction amount, on the basis of the limited correction amount calculating a second exposure value by correcting the first exposure value, images a subject based on said second exposure value on the basis of IMAGING mETHOD der that generates an image data Te Ru.

Claims

A metering unit for metering the subject field into a plurality of areas;
A first exposure calculation unit that calculates a first exposure value based on a photometric result by the photometric unit;
A correction amount calculation unit for calculating a correction amount for restoring the bright portion of the subject with respect to the first exposure value based on the photometric result;
A main subject detection unit for detecting a main subject based on the photometric result; a main subject luminance calculation unit for calculating the luminance of the main subject;
A correction amount limiting unit that limits the correction amount based on the luminance of the main subject;
A second exposure calculation unit that calculates a second exposure value obtained by correcting the first exposure value based on the limited correction amount;
An imaging unit that captures an image of a subject based on the second exposure value and generates image data;
An imaging apparatus comprising:

The imaging device according to claim 1,
A correction amount limiting unit limiting the correction amount based on the detected size of the main subject;
An imaging apparatus characterized by the above.

The imaging device according to claim 2,
The larger the main subject, the greater the limit,
An imaging apparatus characterized by the above.

In the imaging device according to claim 2 or 3,
The correction amount limiting unit normalizes the size of the detected main subject based on the image size of the image data;
An imaging apparatus characterized by the above.

The imaging device according to any one of claims 2 to 4,
When the correction amount is equal to or greater than a limit value, the limited correction amount is set as the limit value;
An imaging apparatus characterized by the above.

The imaging apparatus according to claim 5,
The limit value is
A value obtained by subtracting the under allowance of the face from the first exposure value, and subtracting it from the representative luminance of the main subject;
An imaging apparatus characterized by the above.

A first exposure calculator that calculates a first exposure value based on a photometric result of the object scene;
A correction amount calculation unit for calculating a correction amount of the first exposure value;
A main subject luminance calculator for calculating the luminance of the main subject;
A correction amount limiting unit that limits the correction amount based on the luminance of the main subject;
A second exposure calculation unit that calculates a second exposure value obtained by correcting the first exposure value based on the limited correction amount;
An imaging apparatus comprising: an imaging unit that captures an image of a subject based on the second exposure value and generates image data .

The photographing apparatus according to any one of claims 1 to 7 ,
An imaging apparatus further comprising an image processing unit that corrects gradation so as to brighten a dark part of the image data.

The imaging device according to any one of claims 1 to 8 ,
An image processing device for correcting gradation so as to brighten a dark portion of the image data;
An imaging system comprising:

Divide the object into multiple areas and perform metering,
Calculating a first exposure value based on the photometric result;
Calculating a correction amount for restoring the bright part of the subject with respect to the first exposure value based on the result of the photometry;
Based on the photometric result, a main subject is detected,
Calculate the luminance of the detected main subject,
Limiting the correction amount based on the luminance of the main subject;
Calculating a second exposure value obtained by correcting the first exposure value based on the limited correction amount;
An imaging method for generating an image data by imaging a subject based on the second exposure value.