CN101459784A - Photographing method for making infrared camera device adapted to light - Google Patents

Abstract

The invention relates to a method for enabling an infrared photography device to adapt to light, which comprises the following steps: firstly, presetting a shading object whose shading quantity can be adjusted on the surface of an image sensor of the infrared photography device, when the light intensity of the infrared photography device in a shooting scene, which is obtained from the measure of a photoreceptor or analyzing a pre-shot image by an analyzing unit, exceeds the preset value, confirming the ratio of the occupied area of a to-be shot object in the to-be formed image according to the focal distance of the infrared photography device, the clear and visual distance range of a corresponding lens, the optimum distance for imaging of the to-be shot object, then adjusting the shielding object according to the ratio and enabling the object to cover the corresponding part of the image sensor, which enables the uncovered part of the image sensor to induct infrared light reflected by the to-be shot object, thereby forming a corresponding clear image, preventing the defect of unclear images due to too strong light, reducing the monitoring risks exist in an existing infrared photography device for monitoring.

Description

A kind of image pickup method that makes infrared camera device adapted to light

Technical field

The present invention relates to a kind of image pickup method and related device that makes infrared camera device adapted to light.

Background technology

Infrared eye can utilize the device of infrared imaging principle photographic images at night under the environment, so it uses very extensive in each surveillance.Yet; when infrared camera under strong backlight situation; its picture of gathering out but is a black; therefore when it uses as monitoring; regular meeting can't shoot picture rich in detail because its light that is in is too strong; make the monitor staff be difficult to all kinds of illegal incidents (for example steal, robbery etc.) back is taking place by its captured image acquisition useful information; lose its supervisory function bit thus; therefore how to make infrared eye adapt to different light rays and shoot distinct image, become the technical task that those skilled in the art need to be resolved hurrily in fact.

Summary of the invention

Infrared eye the object of the present invention is to provide a kind of image pickup method that makes infrared camera device adapted to light, so that can be shot picture rich in detail under strong backlight.

Another object of the present invention is to provide a kind of infrared eye that can adapt to light, to reduce the existing monitoring risk that exists as the infrared eye of monitoring usefulness.

Reach other purposes in order to achieve the above object, the image pickup method that makes infrared camera device adapted to light provided by the invention, it comprises step: the shading object of 1) installing a scalable shading amount in advance in the image sensor surface of an infrared eye; 2) when the light intensity in the photographed scene of described infrared eye surpasses preset value, determine object described to be taken shared ratio in image to be formed according to the optimum distance of the scope of visual range clearly of the focal length of described infrared eye, corresponding camera lens, object image-forming to be taken; 3) adjusting described shading object according to determined object shared ratio in image to be formed to be taken makes it block the described imageing sensor of appropriate section, make the imageing sensor that is not blocked to respond to the Infrared of object reflection described to be taken, and then form respective image.

Wherein, step 2) further can comprise step: (1) installs the sensor devices of energy sensing infrared light intensity in described infrared photography scene; (2) described sensor devices is measured the Infrared intensity in the photographed scene of described infrared eye, and judge whether described Infrared intensity surpasses preset value, if then determine object described to be taken shared ratio in the image that forms according to the optimum distance of the scope of visual range clearly of the focal length of described infrared eye, corresponding camera lens, object image-forming to be taken.

In addition, step 2) further also can comprise step: (1) installs the software that the Infrared intensity can be to photographic images the time is analyzed in described infrared eye; (2) described infrared eye is earlier pre-before the object for the treatment of shooting is taken claps the image that a parafacies is answered scene: (3) described infrared eye is analyzed corresponding Infrared intensity when obtaining shooting by described software to the pre-image of clapping of institute; (4) judge that whether described Infrared intensity surpass preset value, if then determine object described to be taken shared ratio in the image that forms according to the optimum distance of the scope of visual range clearly of the focal length of described infrared eye, corresponding camera lens, object image-forming to be taken.

Preferably, described infrared eye can be the infrared camera with light filling lamp; Object described to be taken can be people's face.

The infrared eye that can adapt to light of the present invention comprises: be used to adopt the Infrared shot object to obtain the infrared eye body of respective image; Be installed in the image sensor surface that described infrared eye body is had, be used to block described imageing sensor so that its can't light sensing the shading object; Be arranged in the scene that described infrared eye can take, be used for the sensor devices of the infrared light intensity of the described scene of sensing; Being used for moving so that it blocks described imageing sensor appropriate section according to the described shading object of the measured infrared light strength control of described sensor devices makes the imageing sensor part that is not blocked can respond to the control unit of the infrared light of object to be shot reflection.

The another infrared eye that can adapt to light of the present invention comprises: be used to adopt the Infrared shot object to obtain the infrared eye body of respective image; Be installed in the image sensor surface that described infrared eye body is had, be used to block described imageing sensor so that its can't light sensing the shading object; Be used for according to described infrared eye body the analytic unit of the Infrared intensity of pre-graphical analysis of clapping when taking; The described shading object of Infrared strength control that is used for analyzing according to described analytic unit moves so that its appropriate section of blocking described imageing sensor makes the imageing sensor part that is not blocked can respond to the control unit of the infrared light of object to be shot reflection.

Preferably, described infrared eye body is the infrared camera with light filling lamp.

In sum, image pickup method that makes infrared camera device adapted to light of the present invention and related device are by installing the shading object in image sensor surface, the light that shield portions enters in the time of can making infrared eye face strong backlight, shoot picture rich in detail, real monitoring fully, the not fogging clear monitoring risk that cause of the existing infrared eye of reduction of realizing because of taking.

Description of drawings

State diagram when Fig. 1 a can adapt to the not shading of shading object of infrared eye of light for the present invention.

State diagram when Fig. 1 b can adapt to the shading of shading object of infrared eye of light for the present invention.

Fig. 2 makes the operating process schematic diagram of the image pickup method of infrared camera device adapted to light for the present invention.

Embodiment

Embodiment one:

The infrared eye that can adapt to light of the present invention mainly comprises: infrared eye body, shading object, sensor devices, and control unit.

Described infrared eye body is used to adopt the Infrared shot object to obtain respective image, and for example it can be the infrared camera of light filling lamp.

Described shading object is installed in the image sensor surface that described infrared eye body is had, be used to block described imageing sensor so that it can't light sensing, see also Fig. 1 a and Fig. 1 b, in the present embodiment, describedshading object 11 can be lighttight square lamellar body, when it did not block describedimageing sensor 13, it was in contraction state (as shown in Figure 1a), and Fig. 1 b is the schematic diagram of the describedimageing sensor 13 of its shield portions.In addition, described imageing sensor can be the CCD assembly, also can be cmos component, and described shading object is not to exceed with present embodiment, and for example it also can adopt circular rete etc.

Described sensor devices is arranged in the scene that described infrared eye can take, and is used for the infrared light intensity of the described scene of sensing, and it can directly be fixed on the described infrared eye body usually.

Described control unit is used for moving so that it blocks described imageing sensor appropriate section according to the described shading object of the measured infrared light strength control of described sensor devices makes the imageing sensor part that is not blocked can respond to the infrared light of object to be shot reflection, for example, the infrared light intensity that senses when described sensor devices is crossed when strong, and described infrared eye body is when taking, corresponding object to be taken only occupies 1/5 in image, the described shading object of then described control unit may command shelters from 4/5 imageing sensor (as Fig. 1 b), make described imageing sensor only can respond to the Infrared that object reflected to be taken, so can avoid crossing the shortcoming that the image that causes by force taking is black because of light.

Embodiment two:

The infrared eye that another can adapt to light of the present invention mainly comprises: the infrared eye body, the shading object, analytic unit, and control unit, they are different with the described infrared eye that can adapt to light of embodiment one to be that it adopts analytic unit to obtain infrared light intensity in the described infrared eye scene, be described analytic unit be mainly used in according to described infrared eye body the Infrared intensity of pre-graphical analysis of clapping when taking, when the image of pre-bat is black, described analytic unit can determine that the infrared light intensity in the scene of described infrared eye body place is strong excessively, and corresponding its sends the imageing sensor that enters described infrared eye body with shield portions light that moves that makes described control unit control described shading object.

The image pickup method of infrared camera device adapted to light that makes of the present invention mainly may further comprise the steps:

The first step: install the shading object of a scalable shading amount in advance in the image sensor surface of an infrared eye, described shading object can be photomask, or anti-dazzling screen etc., in the present embodiment, described infrared eye can be infrared camera.Second step: when the light intensity in the photographed scene of described infrared eye surpasses preset value, determine object described to be taken shared ratio in image to be formed according to the optimum distance of the scope of visual range clearly of the focal length of described infrared eye, corresponding camera lens, object image-forming to be taken, the focal length that for example has the infrared camera of light filling lamp is 5mm, the visual range scope is at 30-80cm clearly, the optimum distance of object to be taken (for example people's face) imaging is 40-60cm, D is 0.84mm, according to formula$\frac{1.2}{1-X}=\frac{f}{D}$Calculating described as can be known people's face shared ratio in image to be formed is about 1/5, and in aforementioned formula, f represents focal length, and D represents the aperture, and X represents the ratio of the real area of the imageing sensor that blocks.

In addition, the method of measurement of the light intensity in the photographed scene of described infrared eye has two kinds, first method is to measure according to the sensor devices in the photographed scene that is arranged on described infrared eye to obtain, it mainly comprises step: the 1) sensor devices of installing energy sensing infrared light intensity in described infrared photography scene, have again, also can be directly at described infrared eye installing sensor devices itself; 2) described sensor devices is measured the Infrared intensity in the photographed scene of described infrared eye, and judge whether described Infrared intensity surpasses preset value, if then determine object described to be taken shared ratio in the image that forms according to the optimum distance of the scope of visual range clearly of the focal length of described infrared eye, corresponding camera lens, object image-forming to be taken; Second method is to adopt the image of pre-bat is analyzed to obtain light intensity, and it mainly comprises step: the software that the Infrared intensity when 1) installing can be to photographic images in described infrared eye is analyzed; 2) described infrared eye pre-earlier bat one parafacies before the object for the treatment of shooting is taken is answered the image of scene; 3) described infrared eye by described software to the pre-image of clapping analyze corresponding Infrared intensity when obtaining to take, usually come to clap to such an extent that obtain Infrared intensity the image from pre-by comparatively simple method, for example, the image of establishing pre-shooting is P, brightness is I, then$I=\frac{\mathrm{\ΣP}\left(\mathrm{perPixel}\right)}{\mathrm{Width}\×\mathrm{Height}},$Wherein, P (perPixel) is pre-each gray value of clapping the picture that obtains of expression, and Width represents the width of picture, and Height represents the height of picture, and the light intensity that adapts to is promptly thought in general brightness at 118-212; 4) judge that whether described Infrared intensity surpass preset value, if then determine object described to be taken shared ratio in the image that forms according to the optimum distance of the scope of visual range clearly of the focal length of described infrared eye, corresponding camera lens, object image-forming to be taken.

The 3rd step: adjust described shading object according to determined object shared ratio in image to be formed to be taken and make it block the described imageing sensor of appropriate section, make the imageing sensor that is not blocked to respond to the Infrared of object reflection described to be taken, and then formation respective image, for example, when determining that object to be taken shared ratio in image to be formed is 1/5, therefore can adjust described shading object makes it block 4/5 imageing sensor, make remaining 1/5 the imageing sensor that is not blocked can respond to the Infrared that object described to be taken reflects, so the Infrared inlet can be reduced, and then black image can be avoided forming.

In sum, the image pickup method of infrared camera device adapted to light and the related device of making of the present invention passes through at image sensor surface installing shading object, the light that shield portions enters in the time of can making infrared eye face strong backlight, avoid forming the unsharp image of black, real monitoring fully, the not fogging clear monitoring risk that cause of the existing infrared eye of reduction of realizing because of taking.

Claims (9)

1. image pickup method that makes infrared camera device adapted to light is characterized in that comprising step:

1) installs the shading object of a scalable shading amount in advance in the image sensor surface of an infrared eye;

2) when the light intensity in the photographed scene of described infrared eye surpasses preset value, determine object described to be taken shared ratio in image to be formed according to the optimum distance of the scope of visual range clearly of the focal length of described infrared eye, corresponding camera lens, object image-forming to be taken;

3) adjusting described shading object according to determined object shared ratio in image to be formed to be taken makes it block the described imageing sensor of appropriate section, make the imageing sensor that is not blocked to respond to the Infrared of object reflection described to be taken, and then form respective image.

2. the image pickup method that makes infrared camera device adapted to light as claimed in claim 1 is characterized in that step 2) further comprise step:

(1) sensor devices of installing energy sensing infrared light intensity in described infrared photography scene;

(2) described sensor devices is measured the Infrared intensity in the photographed scene of described infrared eye, and judge whether described Infrared intensity surpasses preset value, if then determine object described to be taken shared ratio in the image that forms according to the optimum distance of the scope of visual range clearly of the focal length of described infrared eye, corresponding camera lens, object image-forming to be taken.

3. the image pickup method that makes infrared camera device adapted to light as claimed in claim 1 is characterized in that step 2) further comprise step:

The software that Infrared intensity when (1) installing can be to photographic images in described infrared eye is analyzed;

(2) described infrared eye pre-earlier bat one parafacies before the object for the treatment of shooting is taken is answered the image of scene;

(3) described infrared eye by described software to the pre-image of clapping analyze corresponding Infrared intensity when obtaining to take;

(4) judge that whether described Infrared intensity surpass preset value, if then determine object described to be taken shared ratio in the image that forms according to the optimum distance of the scope of visual range clearly of the focal length of described infrared eye, corresponding camera lens, object image-forming to be taken.

4. the image pickup method that makes infrared camera device adapted to light as claimed in claim 1 is characterized in that: described infrared eye is the infrared camera with light filling lamp.

5. the image pickup method that makes infrared camera device adapted to light as claimed in claim 1 is characterized in that: object behaviour face described to be taken.

6. infrared eye that can adapt to light is characterized in that comprising:

The infrared eye body is used to adopt the Infrared shot object to obtain respective image;

The shading object is installed in the image sensor surface that described infrared eye body is had, and is used to block described imageing sensor so that it can't light sensing;

Sensor devices is arranged in the scene that described infrared eye can take, and is used for the infrared light intensity of the described scene of sensing;

Control unit is used for moving so that it blocks described imageing sensor appropriate section according to the described shading object of the measured infrared light strength control of described sensor devices and makes the imageing sensor part that is not blocked can respond to the infrared light of object to be shot reflection.

7. the infrared eye that can adapt to light as claimed in claim 5 is characterized in that: described infrared eye body is the infrared camera with light filling lamp.

8. infrared eye that can adapt to light is characterized in that comprising:

The infrared eye body is used to adopt the Infrared shot object to obtain respective image;

The shading object is installed in the image sensor surface that described infrared eye body is had, and is used to block described imageing sensor so that it can't light sensing;

Analytic unit, be used for according to described infrared eye body the Infrared intensity of pre-graphical analysis of clapping when taking;

Control unit, the described shading object of Infrared strength control that is used for analyzing according to described analytic unit move so that its appropriate section of blocking described imageing sensor makes the imageing sensor part that is not blocked can respond to the infrared light of object to be shot reflection.

9. the infrared eye that can adapt to light as claimed in claim 7 is characterized in that: described infrared eye body is the infrared camera with light filling lamp.

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