JP2008118386A5

JP2008118386A5 -

Info

Publication number: JP2008118386A5
Application number: JP2006299383A
Authority: JP
Filing date: 2006-11-02
Publication date: 2009-12-10
Anticipated expiration: 2026-11-02

Claims

A pixel portion having a photoelectric conversion unit, an optical signal generated by the pixel unit, an imaging apparatus for generating a captured image based on a difference component of a noise signal,
Prior to reading the first stored optical signals to the pixel unit in the imaging, it reads the first accumulation time Ma蓄 product with noise signals, the noise signal from the optical signal read out after readout of the noise signal A first captured image generation means for generating a first captured image by subtracting
Wherein prior to the reading of the stored optical signals to the pixel unit in the first second shot after shooting, it reads the first long second accumulation time Ma蓄 product to noise signals than the accumulation time, Second captured image generation means for generating a second captured image by subtracting the noise signal from the optical signal read after reading the noise signal;
Difference image generation means for generating a difference image between the first captured image and the second captured image;
Image area extracting means for extracting, from the difference image, an area closed by a pixel having an output value equal to or greater than a preset threshold value of a pixel signal constituting the difference image;
In either one of the first captured image and the second captured image, the pixels of the pixel signal in the region corresponding to the area extracted by the pre-Symbol image region extracting means, corresponding to the saturation level of the pixel portion Image correction means for replacing with signals ,
An imaging apparatus comprising:

The imaging apparatus according to claim 1, wherein the time from the start of the accumulation of the optical signal to the start of the first accumulation time and the second accumulation time is the same.

Determination means for determining whether or not there is a region that has reached a saturation level in the first captured image;
The said 2nd captured image production | generation means produces | generates the said 2nd captured image according to having determined that the area | region which has reached the saturation level exists by the said determination means. The imaging device described.

Optical system,
The imaging apparatus according to any one of claims 1 to 3 ,
An imaging system comprising:

And a pixel having a photoelectric conversion unit, a control method of an imaging apparatus for generating a captured image based on the difference amount between the generated optical signal and a noise signal by the pixel unit,
Prior to reading out the optical signal accumulated in the pixel unit in the first imaging, the noise signal accumulated in the first accumulation time is read out, and the noise signal is read out from the optical signal read out after the noise signal is read out. Generating a first captured image by subtracting ; and
Before reading out the optical signal accumulated in the pixel unit in the second photographing after the first photographing, the noise signal accumulated in the second accumulation time longer than the first accumulation time is read, Generating a second captured image by subtracting the noise signal from the optical signal read after reading the noise signal;
Generating a difference image between the first captured image and the second captured image,
Extracting from the difference image a region closed by a pixel having an output value equal to or greater than a preset threshold value of a pixel signal of the pixel constituting the difference image;
In either one of the first captured image and the second captured image, a step of replacing the pixel signal in the region corresponding to the region issued extracted, the pixel signals corresponding to the saturation level of the pixel portion ,
A method for controlling an imaging apparatus, comprising: