JP2008193514A5

JP2008193514A5 -

Info

Publication number: JP2008193514A5
Application number: JP2007027134A
Authority: JP
Filing date: 2007-02-06
Publication date: 2010-03-18
Anticipated expiration: 2027-02-06

Claims

An image sensor that repeatedly images a subject;
A first image acquisition unit that acquires a first image representing the shape of the subject including visual information of the subject obtained visually from the image of the subject captured by the imaging device;
A second image acquisition unit that acquires, from the image of the subject captured by the imaging device, a second image that represents the shape of the subject including distance information from the imaging device to the subject;
A storage unit that stores the first image acquired by the first image acquisition unit and the second image acquired by the second image acquisition unit each time the imaging element performs imaging,
Each time the image sensor performs imaging, the position of the subject is changed based on the first image acquired by the first image acquisition unit or the second image acquired by the second image acquisition unit. A position change detection unit to detect;
When the position change detecting unit detects a change in position of the object, by tracking the subject, e Bei and a follow-up region movement section that moves the tracking area for specific control,
The position change detection unit compares the first image stored in the storage unit with the first image newly acquired by the first image acquisition unit, and is stored in the storage unit. Detecting a change in the position of the subject based on one of the comparison results by comparing the second image and the second image newly acquired by the second image acquisition unit;
An imaging apparatus characterized by that.

The position change detection unit acquires the first image or the second image and the first image acquisition unit or the second image acquisition stored in the storage unit every time the image sensor performs imaging. When the object is compared with a newly acquired image and another object crossing the front and rear of the object is detected, the object included in the first image stored in the storage unit and the first image wherein by comparing the object obtaining unit is included in the newly acquired first image, it detects a change in the position of the object,
Each time the image pickup device picks up an image, the second image stored in the storage unit and the second image newly acquired by the second image acquisition unit are used. The image area of the image is divided into a plurality of small areas, and the entropy of each of the divided small areas is obtained, thereby analyzing the positional relationship of the subject included in each of the second images, and the subject Detect changes in the position of
The imaging apparatus according to claim 1 .

The image sensor receives light reflected by the subject, and includes a first pixel unit for acquiring the first image and a second pixel unit for acquiring the second image. As the pixel unit, a plurality of pixel units are arranged in a matrix of i rows × j columns (i, j; natural numbers) .
A first element driving unit that drives the plurality of first pixel units so as to acquire the first image;
A second element driving unit that drives the plurality of second pixel units so as to acquire the second image.
The imaging apparatus according to claim 1 or 2 , wherein

Each of the first pixel units includes a plurality of light receiving units that receive the light reflected by the subject for each color component to generate a signal charge, and output the signal charge generated for each color component. ,
The first element driving unit drives the plurality of light receiving units for each of the color components.
The imaging apparatus according to claim 3 .

Causing the image sensor to repeatedly image the subject;
Obtaining a first image representing the shape of the subject including visual information of the subject obtained visually from an image captured each time the image sensor performs imaging;
Obtaining a second image representing the shape of the subject, including distance information from the imaging device to the subject, from an image captured each time the imaging device performs imaging;
Each time the image sensor performs imaging, the storage unit stores the first image acquired in the step of acquiring the first image and the second image acquired in the step of acquiring the second image. And steps to
Detecting a change in the position of the subject based on the first image or the second image acquired each time the image sensor performs imaging;
Moving a tracking area for performing specific control, which is set to track the subject when detecting a change in the position of the subject ,
The step of detecting the change in the position compares the first image stored in the storage unit with the first image newly acquired in the step of acquiring the first image, and By comparing the second image stored in the section and the second image newly acquired in the step of acquiring the second image, the position of the subject is determined based on one of the comparison results. Detect changes in the
An object tracking method for an imaging apparatus.

On the computer,
A procedure for repeatedly imaging a subject with an image sensor;
A procedure for acquiring a first image representing the shape of the subject including visual information of the subject obtained visually from an image captured each time the image sensor performs imaging,
A procedure for acquiring a second image representing the shape of the subject including distance information from the imaging device to the subject from an image captured each time the imaging device performs imaging;
Each time the image sensor performs imaging, the storage unit stores the first image acquired in the procedure of acquiring the first image and the second image acquired in the procedure of acquiring the second image. Procedure to remember,
A procedure for detecting a change in the position of the subject based on the first image or the second image acquired each time the image sensor performs imaging ;
A procedure for moving a tracking area for performing specific control, which is set to track the subject when detecting a change in the position of the subject;
Was executed,
The procedure for detecting the change in the position compares the first image stored in the storage unit with the first image newly acquired in the procedure for acquiring the first image, and the storage By comparing the second image stored in the unit and the second image newly acquired in the procedure for acquiring the second image, the position of the subject based on one of the comparison results Detect changes in the
A program characterized by that .