JP2012231319A5

JP2012231319A5 - Subject tracking device, imaging device, subject tracking method and program

Info

Publication number: JP2012231319A5
Application number: JP2011098567A
Authority: JP
Filing date: 2011-04-26
Publication date: 2014-06-19
Anticipated expiration: 2031-04-26

Description

本発明の被写体追尾装置は、第１の画像データ内の追尾対象領域における特徴色を決定する決定手段と、前記第１の画像データの追尾対象領域から、複数の前記特徴色のそれぞれの特徴度に応じた階調を持つ第３の画像データを生成し、前記第１の画像データとは別のフレームの第２の画像データから、複数の前記特徴色のそれぞれの特徴度に応じた階調を持つ第４の画像データを生成する第１の生成手段と、前記第４の画像データの領域ごとに前記第３の画像データとの相関量である第１の相関量を求め、前記第１の相関量に基づいて、前記第２の画像データにおける追尾対象領域を設定する設定手段と、を有することを特徴とする。 The subject tracking device according to the present invention includes : a determining unit that determines a characteristic color in a tracking target area in the first image data; and a characteristic degree of each of the plurality of characteristic colors from the tracking target area of the first image data. The third image data having a gradation corresponding to the first image data is generated, and the gradation corresponding to the feature degree of each of the plurality of feature colors is obtained from the second image data of a frame different from the first image data. A first generation unit that generates fourth image data having a first correlation amount, and a first correlation amount that is a correlation amount between the third image data for each region of the fourth image data; And setting means for setting a tracking target area in the second image data based on the correlation amount .

Claims

Determining means for determining a characteristic color in the tracking target area in the first image data;
The add tail target area or al of the first image data, forms a third image picture data having the gradation corresponding to each feature of the plurality of the characteristic color green, the first image data from the second image data of another frame and a first generating means for generating a fourth images data having gradation corresponding to each feature of the plurality of the characteristic color,
A first correlation amount that is a correlation amount with the third image data is obtained for each region of the fourth image data, and a tracking target region in the second image data is obtained based on the first correlation amount. A setting means for setting
Object tracking apparatus, comprising a.

It said determining means, on the basis of the color information obtained from the tracking target area of the first image data to generate a histogram to classify hue predetermined classification unit, determines the characteristic color based on the histogram subject tracking apparatus according to claim 1, wherein to Rukoto.

Before SL determining means, based on the numerical value of the ordinate of the histogram, the subject tracking apparatus according to claim 2, wherein the determination of the respective characteristics of a plurality of said characteristic color.

Before SL determining means, and the distance from the center of the tracking target area to each pixel in said first image data, based on the number of pixels corresponding to each of the classification units, a plurality of the characteristic color of each subject tracking apparatus according to claim 2 or 3, characterized in that calculates a characteristic degree.

Before SL determining means, according to hue characteristics of represented by the histogram corresponding to the predetermined condition is satisfied classification units to any one of claims 2 to 4, characterized in that to determine as the characteristic color Subject tracking device.

Before SL determining means synthesizes a plurality of histograms generated from the image data of a plurality of frames, claim 2乃 optimum 5, wherein determining the characteristic color based on the combined histogram 1 The subject tracking device according to the item.

Before SL determining means, as the specific gravity against the histogram obtained from a relatively newly acquired frame is heavy, the object tracking apparatus according to claim 6, characterized in that combining a plurality of said histogram.

From the tracking target region before Symbol first image data, to generate a fifth image data having gradation corresponding to the luminance, from the second image data, the sixth image with gradation corresponding to the luminance A second generating means for generating data;
The setting means is configured based on a second correlation amount that is a correlation amount between the first correlation amount and the fifth image data obtained for each region of the sixth image data. subject tracking apparatus according to any one of claims 1乃 optimum 7, characterized in that to set the tracking target area in the image data.

Before Symbol setting means setting, when the second predetermined threshold value greater than the amount of correlation is present, the region extracted based on the second correlation amount as the tracking target region in the second image data When the second correlation amount does not have a value larger than a predetermined threshold, the region extracted based on the first correlation amount is set as a tracking target region in the second image data. The subject tracking device according to claim 8 .

A subject tracking device according to any one of claims 1 to 9,
An image sensor for obtaining an image signal to be converted into the first image data and the second image data;
An imaging device comprising:

A subject tracking method executed by the subject tracking device,
A determining step for determining a plurality of characteristic colors in the tracking target area of the first image data;
From the tracking target area of the first image data, third image data having a gradation according to the feature degree of each of the plurality of feature colors is generated, and in a frame different from the first image data A first generation step of generating, from the second image data, fourth image data having a gradation according to the respective feature degrees of the plurality of feature colors;
A first correlation amount that is a correlation amount with the third image data is obtained for each region of the fourth image data, and a tracking target region in the second image data is obtained based on the first correlation amount. A setting step to set
A method for tracking an object, comprising:

On the computer,
A determining step for determining a plurality of characteristic colors in the tracking target area of the first image data;
From the tracking target area of the first image data, third image data having a gradation according to the feature degree of each of the plurality of feature colors is generated, and in a frame different from the first image data A first generation step of generating, from the second image data, fourth image data having a gradation according to the respective feature degrees of the plurality of feature colors;
A first correlation amount that is a correlation amount with the third image data is obtained for each region of the fourth image data, and a tracking target region in the second image data is obtained based on the first correlation amount. A setting step to set
A program for running