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Imaging apparatus and method, operating apparatus and method, program, and recording medium

A technology of camera device and camera conditions, applied in image enhancement, image analysis, image data processing and other directions, can solve the problem of false signal being unable to correctly extract the subject and so on

Inactive Publication Date: 2017-11-28
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, there is a problem in the technique of extracting the subject area using the difference image: In a space where the ambient light or the background changes rapidly, such as inside a moving car or outdoors, the object area cannot be correctly extracted due to the influence of artifacts. subject

Method used

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  • Imaging apparatus and method, operating apparatus and method, program, and recording medium
  • Imaging apparatus and method, operating apparatus and method, program, and recording medium
  • Imaging apparatus and method, operating apparatus and method, program, and recording medium

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Embodiment approach 1

[0061] figure 1 It is a block diagram showing the configuration of the imaging device according to Embodiment 1 of the present invention. The illustrated imaging device includes an imaging and irradiation control unit 11 , an irradiation unit 12 , an imaging unit 13 , a brightness change calculation unit 21 , a texture change calculation unit 22 , a subject extraction unit 23 , and an image memory 14 .

[0062] The imaging device of this embodiment takes, for example, a person as a subject. Specifically, a person's whole body or a part of a person's body such as an upper body, a face, and a hand is used as a subject to extract only the subject from the background.

[0063] The imaging and irradiation control unit 11 outputs a control signal (illumination condition control signal) C11 a for controlling the illumination condition to the irradiation unit 12 , and generates a control signal (imaging condition control signal) C11 b for controlling the imaging condition and outputs...

Embodiment approach 2

[0328] Figure 21 It is a block diagram showing the configuration of an imaging device according to Embodiment 2 of the present invention. Figure 21 The camera shown with the figure 1 The imaging devices shown are substantially the same, except that a target value calculation unit 24 is added, and an imaging and irradiation control unit 11 b is provided instead of the imaging and irradiation control unit 11 . and figure 1 The same reference numerals denote the same or corresponding parts, and therefore explanations thereof are omitted.

[0329] exist figure 1 In the imaging device shown, the lighting conditions and imaging conditions are fixed, but in the imaging device of the present embodiment, the target value calculation unit 24 calculates By adjusting at least one of the lighting conditions and the imaging conditions, the accuracy of extracting the subject region is improved in response to changes in ambient light or background.

[0330] The adjustment of the lighti...

Embodiment approach 3

[0387] Figure 25 It is a block diagram showing the configuration of an imaging device according to Embodiment 3 of the present invention. Figure 25 The camera shown with the Figure 21 The imaging device shown is substantially the same, except that it has an imaging and irradiation control unit 11c, a brightness change calculation unit 21c, a texture change calculation unit 22c, an object extraction unit 23c, and a target value calculation unit 24c instead of Figure 21 The imaging and irradiation control unit 11b, the brightness change calculation unit 21, the texture change calculation unit 22, the subject extraction unit 23, and the target value calculation unit 24. and Figure 21 The same reference numerals denote the same or corresponding parts, and therefore explanations thereof are omitted.

[0388] In Embodiment 2, the texture change calculation unit 22 calculates one texture change dF from two images captured under different lighting conditions at different times...

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Abstract

According to the present invention, a brightness change (dI) is calculated (21) with respect to each pixel, using a plurality of captured images obtained by imaging performed under different lighting conditions; a texture change (dF) is calculated (22) with respect to each pixel, using a plurality of captured images obtained by imaging performed at different times; and a subject region is extracted (23) on the basis of the brightness change (dI) and the texture change (dF). A change, between the captured images, in texture feature (F) for each pixel of the images is calculated as the texture change (dF). A subject can thus be extracted with high accuracy even when there is a change in ambient light or background.

Description

technical field [0001] The present invention relates to an imaging device and method for extracting a subject region from a captured image. In particular, the present invention relates to a technique for extracting a subject region using a difference between two or more captured images obtained by capturing images under different lighting conditions. The present invention also relates to an operating device and method for operating equipment using data obtained by the aforementioned imaging device. The present invention also relates to a program for causing a computer to execute processing in the aforementioned imaging device or method, or the aforementioned operating device or method, and a computer-readable recording medium on which the program is recorded. Background technique [0002] When shooting a person or a part (hand, etc.) approaching the camera as the subject for the purpose of monitoring the state or movement of the person, the surrounding background is removed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/246G06F3/01G06T1/00
CPCG06T2207/10016G06T2207/10152G06T2207/30196G06T7/11G06F3/017G06F3/0304G06T7/194
Inventor 中村雄大福田智教神谷雅志内藤正博
Owner MITSUBISHI ELECTRIC CORP
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