JP2014082698A5

JP2014082698A5 -

Info

Publication number: JP2014082698A5
Application number: JP2012230648A
Authority: JP
Filing date: 2012-10-18
Publication date: 2014-08-28
Anticipated expiration: 2032-10-18

Description

本発明の一側面としての撮像装置は、一つの画像出力期間に第１の画像および第２の画像を取得可能な撮像素子と、撮影条件に応じてダークシェーディング補正用画像を取得するか否かを判定する画像判定手段と、前記画像判定手段が前記ダークシェーディング補正用画像を取得すると判定した場合、前記第２の画像の代わりに該ダークシェーディング補正用画像を取得する画像取得手段と、前記ダークシェーディング補正用画像を用いて前記第１の画像および前記第２の画像を補正する画像補正手段とを有する。 An image pickup apparatus as one aspect of the present invention includes a first image and the second image can be acquired imaging element to one of the image output period, whether or not to acquire an image for dark shading correction according to the shooting condition Image determining means for determining the image, and when the image determining means determines to acquire the dark shading correction image, the image acquiring means for acquiring the dark shading correction image instead of the second image , and the dark and an image correcting means for correcting the first image and the second image by using the shading correction image.

本発明の他の側面としての撮像装置の制御方法は、一つの画像出力期間に第１の画像および第２の画像を取得可能な撮像装置の制御方法であって、撮影条件に応じてダークシェーディング補正用画像を取得するか否かを判定するステップと、前記ダークシェーディング補正用画像を取得すると判定した場合、前記第２の画像の代わりに該ダークシェーディング補正用画像を取得するステップと、前記ダークシェーディング補正用画像を用いて前記第１の画像および前記第２の画像を補正するステップとを有する。 Control method for an imaging apparatus as another aspect of the present invention is a control method for an image output period to the first image and obtaining image pickup apparatus capable of a second image, dark shading according to the imaging condition A step of determining whether or not to acquire a correction image; a step of acquiring the dark shading correction image instead of the second image if it is determined to acquire the dark shading correction image; and a step of correcting the first image and the second image by using the shading correction image.

Claims

The first image and the second image can be acquired imaging device into a single image output period,
Image determining means for determining whether or not to acquire a dark shading correction image according to shooting conditions;
An image acquisition unit that acquires the dark shading correction image instead of the second image when the image determination unit determines to acquire the dark shading correction image;
Imaging apparatus characterized by having an image correction means for correcting the first image and the second image using the dark shading correction image.

The shooting condition is a temperature at the time of shooting,
The imaging apparatus according to claim 1, wherein the image determination unit determines to acquire the dark shading correction image when the temperature is higher than a predetermined temperature.

The imaging condition further includes the acquired in two image output period the first image or the gain variation of the second image,
The image determination unit determines to acquire the dark shading correction image when the temperature is higher than the predetermined temperature and the absolute value of the gain change amount is larger than a predetermined change amount. The imaging apparatus according to claim 2.

Image generating means for generating an output image by combining the first image and the second image ;
The image generation means, when the image acquisition means acquires the dark shading correction image in the first image output period, the first image acquired in the first image output period, and the first 4. The output image in the first image output period is generated by combining the second images acquired in the second image output period immediately before the image output period. The imaging device according to any one of the above.

The first image and the second image have different exposure conditions,
The imaging apparatus according to claim 4, wherein the image generation unit generates a dynamic range expanded image as an output image by combining the first image and the second image .

A storage unit for storing the dark shading correction image;
The image correcting means corrects the first image and the second image using the dark shading correction image stored in the storage means,
When the image acquiring unit acquires a new dark shading correction image, the dark shading correction image already stored in the storage unit is updated to the new dark shading correction image. Item 6. The imaging device according to any one of Items 1 to 5.

A mechanical shutter that shields light to the image sensor;
The imaging according to any one of claims 1 to 6, wherein the image acquisition unit acquires the dark shading correction image in a state where light to the imaging element is shielded by the mechanical shutter. apparatus.

The imaging device includes a pixel having no photodiode,
The imaging apparatus according to claim 1, wherein the image acquisition unit acquires the dark shading correction image by reading a signal from a pixel that does not include the photodiode. .

It said image acquisition means further comprises a switching means for switching whether to output the first image and the second image from the imaging device,
The image acquisition unit acquires the dark shading correction image in a state where the switching unit is turned off so as not to output the first image and the second image. The imaging device according to any one of 6.

Wherein the image determination means, wherein the first dark shading correction image to determine whether acquired according to the first imaging condition of the first image, the second imaging condition of the second image In response, it is determined whether or not to obtain the second dark shading correction image,
The image acquisition unit acquires the first dark shading correction image instead of the first image when the image determination unit determines to acquire the first dark shading correction image, and the image If the determination means determines that obtaining the second dark shading correction image to obtain a dark shading correction image of the second instead of the second image,
Wherein the image correcting means, characterized in that said first using dark shading correction image to correct the first image, corrects the second image using the second dark shading correction image The imaging device according to any one of claims 1 to 9.

A lens unit;
An imaging system comprising: the imaging device according to claim 1, which acquires a subject image via the lens unit.

One of the image output period and a control method of the first image and the second obtaining an imaging apparatus capable of image,
Determining whether to obtain a dark shading correction image according to shooting conditions;
If it is determined to acquire the dark shading correction image, acquiring the dark shading correction image instead of the second image ;
Control method for an imaging apparatus characterized by having a step of correcting the first image and the second image using the dark shading correction image.

An imaging control unit that causes the imaging unit to capture a first image and a second image that are differently exposed in one image output period;
Combining the first image and the second image output by the imaging unit, and sequentially outputting a combined image;
The synthesizing unit generates the synthesized image by synthesizing the first image and the second image obtained in different image output periods according to shooting conditions.

The photographing condition is a temperature at the time of photographing, and the combining unit combines the first image and the second image obtained in different image output periods when the temperature is higher than a predetermined temperature. The image processing apparatus according to claim 13, wherein the composite image is generated.

The image processing apparatus according to claim 13, wherein the photographing condition is a gain applied to an image output from the imaging unit.

The synthesizing unit generates the synthesized image by synthesizing the first image and the second image obtained in different image output periods when the gain setting changes more than a predetermined change amount. The image processing apparatus according to claim 15.

The synthesizing unit may be configured such that, when the imaging unit acquires the third image instead of the first image or the second image in the one image output period, the image output period immediately before the one image output period. The image processing apparatus according to claim 13, wherein the composite image is generated using the first image or the second image.

Causing the imaging means to image a first image and a second image that are differently exposed in one image output period;
Combining the first image and the second image output by the imaging unit and sequentially outputting a combined image,
In the step of outputting the synthesized image, the synthesized image is generated by synthesizing the first image and the second image obtained in different image output periods according to shooting conditions. A method for controlling a processing apparatus.