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camera device

A camera device and image technology, applied in photography, image communication, exposure control, etc., can solve the problems of inability to properly evaluate exposure

Inactive Publication Date: 2016-04-13
PANASONIC INTPROP MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, when the subject moves within the target area, the position of the subject image differs for each frame, and if the evaluation range is fixed, the exposure may not be properly evaluated.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0055] The imaging device A of this embodiment is as figure 1 As shown, a light source unit 1, a light emission control unit 2, an imaging unit 3, a drive control unit 4, a lens unit 5, an incident light amount adjustment unit 6 and an image generation unit 7 are provided. The light source unit 1 is formed by arranging a plurality of infrared light emitting diodes in a matrix, and irradiates infrared light to the target area (the lane where the car is traveling). The light emission control unit 2 causes current to flow to the infrared light emitting diodes of the light source unit 1 to emit light. The imaging unit 3 has an imaging element that is sensitive to infrared light. The drive control unit 4 drives and controls the imaging unit 3. The lens unit 5 condenses the light to the imaging element of the imaging unit 3. The incident light amount adjustment unit 6 controls the aperture provided in the lens unit 5 to adjust the amount of light incident on the imaging unit 3. T...

Embodiment approach 2

[0083] Next, refer to Figure 6 ~ Figure 10 The second embodiment will be described. The same reference numerals are assigned to the same or corresponding structures as in the first embodiment, and redundant descriptions are omitted.

[0084] The imaging device A1 of the second embodiment is as Image 6 As shown, there are a plurality of (four in the example of the figure) light source units 1a to 1d that irradiate light (infrared light) to the target area (the lane where the car is driving), and the light emission control unit 2 that makes the light source units 1a to 1d emit light. , The imaging section 3 provided with an imaging element that has sensitivity to infrared light, the drive control section 4 that drives and controls the imaging section 3, and the generation of the first imaging section 3 that is synchronized with the irradiation period of the infrared light from the light source sections 1a to 1d. The image generating unit 7 is a differential image (light modulated...

Embodiment approach 3

[0107] Below, refer to Figure 11-14 The third embodiment will be described. In the description of the third embodiment, the same reference numerals are given to the same structures, and repeated descriptions are omitted.

[0108] The imaging device A6 (surveillance camera) of this embodiment is as Picture 11 As shown, a light source unit 1 that causes a light source to emit light to irradiate light to a target area 1, a light-emission control unit that supplies power to the light source unit 1 to cause the light source to emit light, a two-dimensional CCD image sensor, and a light-receiving surface that directs light to the image sensor The imaging unit 3, such as a focusing lens (not shown), the imaging control unit 4, which adjusts the exposure time and exposure of the image sensor, generates the second imaging unit 3 that is synchronized with the irradiation period of the light from the light source unit 1 The image generating unit 7 for the difference image of the first ima...

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PUM

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Abstract

Provided is an imaging device, comprising: a light irradiation mechanism for irradiating light to an object area; a differential image generation mechanism for generating a difference image between a first image and a second image, the first image being the same as the light irradiation mechanism for irradiating the light The second image is an image taken outside the irradiation period; the transmittance estimation mechanism estimates the transmittance of the object existing in the target area to the above-mentioned light; and the exposure amount adjustment mechanism is based on The estimated result of the transmittance estimation means adjusts the exposure amount so that the exposure amount of the above-mentioned difference image falls within a predetermined appropriate range. The transmittance estimating means estimates the transmittance of the object based on at least one of the first image, the second image, or the difference image.

Description

Technical field [0001] The present invention relates to an imaging device for capturing an image with reduced influence of ambient light. Background technique [0002] The applicant has already proposed an imaging device that obtains a difference image between the image taken when the light is irradiated with the light irradiation mechanism (the image during light emission) and the image taken when the light is not irradiated with the light irradiation mechanism (the image during non-light emission) (refer to Patent Document 1). In this differential image, only the reflected light component of the light irradiated from the light irradiation mechanism is used as the pixel value, and the influence of ambient light such as sunlight is reduced. [0003] Patent Document 1: JP 2006-121617 No. [0004] However, in the above-mentioned imaging device, if there is an obstacle (hereinafter, simply referred to as an obstacle) that transmits light like glass between it and the subject, the ligh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/235G03B7/16G03B15/03H04N5/225H04N23/75G03B15/05
CPCG03B7/16G03B15/03H04N23/56H04N23/73H04N23/74G03B15/05H04N23/71H04N23/651
Inventor 森康洋河源英喜山中睦裕竹之内利春中元荣次上杉修
Owner PANASONIC INTPROP MANAGEMENT CO LTD