CN109327665A - Image acquiring device and its infrared sensing method - Google Patents
Image acquiring device and its infrared sensing method Download PDFInfo
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- CN109327665A CN109327665A CN201710616093.4A CN201710616093A CN109327665A CN 109327665 A CN109327665 A CN 109327665A CN 201710616093 A CN201710616093 A CN 201710616093A CN 109327665 A CN109327665 A CN 109327665A
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- pixel
- infrared
- processor
- infrared ray
- application region
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/30—Transforming light or analogous information into electric information
- H04N5/33—Transforming infrared radiation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
Abstract
The present invention provides a kind of image acquiring device and its infrared sensing method.Image acquiring device of the invention includes imaging sensor, camera lens and processor.Wherein, imaging sensor includes multiple pixels to sensed color, and wherein imaging sensor is divided into infrared ray application region and non-infrared ray application region, and is located in the pixel of infrared ray application region and has assigned multiple infrared sensing pixels.Camera lens is configured on imaging sensor, and subject is made to image in imaging sensor.Processor couples imaging sensor and camera lens, is the color image of subject to be obtained using the pixel of imaging sensor, and the infrared view of subject is obtained using infrared sensing pixel.Region by needing to obtain infrared view in the image sensor is implanted into infrared sensing pixel, can obtain required infrared view in the case where not influencing or reducing the picture quality for influencing imaging sensor.
Description
Technical field
The present invention relates to a kind of image acquiring device and method more particularly to a kind of image acquiring device and its infrared ray senses
Survey method.
Background technique
With scientific and technological evolution, the portable electronic devices such as smart phone, tablet computer are had become in mankind's daily life not
Can or one of scarce tool.In order in response to market competition, and meet the diversified use demand of consumer, various manufacturers there's no one who doesn't or isn't cause
Power is in integrating multiple function on its product, to promote the competitiveness of product.
Portable electronic devices on the market are other than providing the functions such as basic photograph, call, online at present, also another knot
The technologies such as proximity sensing, biological characteristic sensing have been closed, have promoted its ease of use whereby.Iris recognition technology therein is recent
A kind of privacy mechanism of newest release, this technology are the infrared views that user face is shot using infrared sensor, and
The iris for therefrom identifying user, confirms the status of user whereby.By this technology, device need to only be taken eye by user
Before, it can no input password or execute other operation in the case where, by configuring in the positive infrared ray sensing of device
Device shooting image simultaneously executes iris recognition, thus tripper.
However, due to may be configured with the elements such as camera, proximity sense, microphone, volume on portable electronic devices
The outer infrared sensor that is reconfigured increases the design difficulty of device, manufacturing cost.Although in addition, at present it has been proposed that will
The mixing detection technology that infrared sensing pixel is mixed with color pixel, such as the pixel of imaging sensor shown in FIG. 1 10 are matched
In setting, infrared sensing pixel (IR) is blended in the color pixel (including R, G, B pixel) of imaging sensor, but these are infrared
Line sensor pixel will occupy the space of imaging sensor 10, and replace original pixel, as a result then destroy imaging sensor
10 originally the picture quality having.
Summary of the invention
The present invention provides a kind of image acquiring device and its infrared sensing method, can be in the image to imaging sensor
In the case that quality influence is less, required infrared view is obtained.
Image acquiring device of the invention includes imaging sensor, camera lens and processor.Wherein, imaging sensor includes using
With multiple pixels of sensed color, wherein imaging sensor is divided into infrared ray application region and non-infrared ray application region, and
Multiple infrared sensing pixels have been assigned in the pixel of infrared ray application region.Camera lens is arranged on imaging sensor,
Subject is set to image in imaging sensor.Processor couples imaging sensor and camera lens, is the picture using imaging sensor
Element obtains the color image of subject, and the infrared view of subject is obtained using infrared sensing pixel.
In one embodiment of this invention, the infrared ray application region is located at the middle section of imaging sensor.
In one embodiment of this invention, infrared ray application region position in the image sensor and size with
Position and size of two peripheral regions of the mankind in face are consistent.
In one embodiment of this invention, the image acquiring device further includes to show described image sensor institute
The display of image is obtained, the correspondence area of infrared ray application region is wherein indicated in image of the processor also shown by display
Domain.
In one embodiment of this invention, the processor is including the use of multiple around each infrared sensing pixel
The pixel value of this infrared sensing pixel position of the calculated for pixel values of pixel.
In one embodiment of this invention, each pixel in non-infrared ray application region includes a sub- picture of red
Element, a blue subpixels and two green sub-pixels, and each pixel being located in infrared ray application region includes one red
Sub-pixels, a blue subpixels, a green sub-pixels and an infrared sensing pixel.
The infrared sensing method of image acquiring device of the invention is suitable for including imaging sensor, camera lens and processor
Image acquiring device.In this method, camera lens is controlled by processor first, so that subject is imaged on imaging sensor,
Wherein imaging sensor is divided into infrared ray application region and non-infrared ray application region, and is located at infrared ray application region
Multiple infrared sensing pixels have been assigned in pixel.Then, subject is obtained using the pixel of imaging sensor by processor
Color image, and by processor using infrared sensing pixel obtain subject infrared view.
In one embodiment of this invention, the image acquiring device further includes display, and is utilized by processor
Before infrared sensing pixel obtains the step of infrared view of subject, the method also includes being shown to scheme by processor
The image as acquired in sensor in display, and in this image indicate infrared ray application region corresponding region.
In one embodiment of this invention, the coloured silk for obtaining subject using the pixel of imaging sensor by processor
Chromatic graph as the step of include infrared using the calculated for pixel values of multiple pixels around each infrared sensing pixel by processor
The pixel value of line sensor pixel position.
In one embodiment of this invention, the red of subject is obtained using infrared sensing pixel by processor described
After the step of outer line image, the method also includes identifying the biological characteristic in infrared view by processor, with execution pair
The function of answering.
Based on above-mentioned, of the invention image acquiring device and its infrared sensing method, by the way that infrared sensor is whole
It closes in the image sensor, and only specific infrared ray application region is implanted into infrared sensing pixel in the image sensor,
And maintain the color pixel in other regions to configure, whereby can the picture quality on imaging sensor influence it is less in the case where,
Infrared view needed for obtaining.
To make the foregoing features and advantages of the present invention clearer and more comprehensible, special embodiment below, and it is detailed to cooperate attached drawing to make
Carefully it is described as follows.
Detailed description of the invention
Fig. 1 is the schematic diagram of the pixel configuration of conventional images sensor.
Fig. 2 is the block diagram according to image acquiring device shown by one embodiment of the invention.
Fig. 3 A and Fig. 3 B are the schematic diagrames according to the pixel configuration of imaging sensor shown by one embodiment of the invention.
Fig. 4 is the flow chart according to the infrared sensing method of image acquiring device shown by one embodiment of the invention.
Fig. 5 is according to the schematic diagram for indicating infrared ray application region shown by one embodiment of the invention.
Fig. 6 A to Fig. 6 C is the comparison schematic diagram according to infrared sensing method shown by one embodiment of the invention.
Attached drawing indicates explanation
10,24,32,34: imaging sensor
20,50,62,64,66: image acquiring device
22: camera lens
26: display
28: processor
32a, 34a: infrared ray application region
52: the corresponding region of infrared ray application region
60: user
S402~S406: the step of the infrared sensing method of the image acquiring device of one embodiment of the invention.
Specific embodiment
Based on infrared ray application usually just for the privileged site of human body (such as eyeball, blood vessel etc.), and user makes
With that would generally keep suitable distance when this kind of application, this represents this privileged site and only accounts for one in the image acquired in camera
Point.That is, for the mixing detection technology for being implanted into infrared sensing pixel in the image sensor, imaging sensor
The middle region for needing to sense infrared ray also only accounts for a part.Accordingly, the present invention only the middle section of imaging sensor or other
Suitable for being implanted into infrared sensing pixel, other regions in the region (such as corresponding to face or region of eye) of infrared ray application
It then still maintains to configure using normal color pixel (such as R, G, B pixel).It whereby, can be in the picture quality to imaging sensor
Influence it is less in the case where, obtain color image and infrared view simultaneously using the same camera, and such as iris is provided and is known
The functions such as not.
Fig. 2 is the block diagram according to image acquiring device shown by one embodiment of the invention.Referring to figure 2., this implementation
The image acquiring device 20 of example is, for example, mobile phone, tablet computer, laptop, navigation device, driving recorder, digital phase
Machine, digital code camera (Digital Video Camcorder, DVC) etc. have the electronic device of camera function.Image obtains dress
Setting in 20 includes camera lens 22, imaging sensor 24, display 26 and processor 28, and function is described below:
Camera lens 22 is composed of several concave-convex lens, is by stepper motor or voice coil motor (Voice Coil
Motor, VCM) etc. actuators driving to change the relative position between lens, to change the focal length of camera lens 22.In camera lens 22
Configured with aperture and shutter, aperture is the round aperture being made of many metal blades, this aperture can be with the size of f-number
And open big or reduce, and then control the light-inletting quantity of camera lens 22, shutter is then the length of time to control light entry into camera lens 22,
It will affect the light exposure of 24 acquired image of imaging sensor with the combination of aperture.
Imaging sensor 24 is connected to camera lens 22 or is configured in camera lens 22, wherein being configured with charge coupled cell
(Charge Coupled Device, CCD), Complimentary Metal-Oxide semiconductor (Complementary Metal-Oxide
Semiconductor, CMOS) element or other kinds of photosensitive element, and the light intensity into camera lens 22 can be sensed to produce
The image of raw subject.
Display 26 is, for example, liquid crystal display (Liquid-Crystal Display, LCD), light emitting diode
The display of (Light-Emitting Diode, LED) display or other suitable species, such as can show by image sensing
The image for the subject that device 24 generates.
Processor 28 is, for example, central processing unit (Central Processing Unit, CPU) or other can program
Microprocessor, digital signal processor, programmable controller, Application Specific Integrated Circuit or the other similar device of change,
It is to receive image caused by imaging sensor 24, and subsequent processing is carried out to this image.
It should be noted that the imaging sensor 24 of the present embodiment includes multiple pixels to sensed color, can divide
For infrared ray application region and non-infrared ray application region.Wherein, the pixel positioned at non-infrared ray application region only include to
The pixel (such as R, G, B pixel) of sensed color, and be located in the pixel of infrared ray application region and then assigned multiple infrared rays
Sensor pixel.
For example, Fig. 3 A and Fig. 3 B is the pixel configuration according to imaging sensor shown by one embodiment of the invention
Schematic diagram.A referring to figure 3., the imaging sensor 32 of the present embodiment include multiple pixels, each pixel includes a red son
Pixel (R), a blue subpixels (B) and two green sub-pixels (G).Wherein, the middle section 32a of imaging sensor 32 is
The preset infrared ray application region of the present embodiment, and the pixel in centrally located region 32a has then assigned individually an infrared ray
Sensor pixel (IR), so that each pixel includes a red sub-pixel (R), a blue subpixels (B), a green
Sub-pixel (G) and an infrared sensing pixel (IR).In other words, each pixel in middle section 32a uses
Infrared sensing pixel replaces one of green sub-pixels.Whereby, imaging sensor 32 can be obtained using color pixel
While taking color image, also infrared view can be obtained using the infrared sensing pixel in middle section 32a.
B referring to figure 3., the imaging sensor 34 of the present embodiment include multiple pixels, each pixel includes a red
Sub-pixel (R), a blue subpixels (B) and two green sub-pixels (G).Wherein, the region 34a of imaging sensor 32 is this
The preset infrared ray application region of embodiment, and the pixel being located in the 34a of region has then assigned individually an infrared sensing picture
Plain (IR), so that each pixel includes a red sub-pixel (R), a blue subpixels (B), a green sub-pixels
(G) and an infrared sensing pixel (IR).Unlike the imaging sensor 32 of Fig. 3 A, the imaging sensor of the present embodiment
Infrared ray application region (i.e. region 34a) in 34 is that the region of corresponding mankind's eye (corresponds to people in imaging sensor 34
In the case where the region of class face).That is, position of the infrared ray application region of the present embodiment in imaging sensor 34
And the position and size of size and two peripheral regions of the mankind in face are consistent.
It should be noted that for convenience of explanation, the embodiment of above-mentioned Fig. 3 A and Fig. 3 B are illustrated only for 18 pixels
Bright idea of the invention, but in practical application, imaging sensor may include millions of or even ten million pixel.And based on this
The teaching of embodiment, no matter the number of pixels of imaging sensor why, the demand of all visual practical infrared ray application, in image biography
It selects the infrared ray application region of proper proportion, size or shape to configure infrared sensing pixel in sensor, and is not limited to
The embodiment of the present embodiment.
Based on the framework of above-mentioned image acquiring device 20, the present invention is separately provided suitable for the infrared of this image acquiring device 20
Line method for sensing.In detail, Fig. 4 is the infrared sensing method according to image acquiring device shown by one embodiment of the invention
Flow chart.Referring to Fig. 2 and Fig. 4, the method for the present embodiment is suitable for the image acquiring device 20 of above-mentioned Fig. 2, below
That is each item of image acquiring device 20 in collocation Fig. 2, illustrates the detailed step of the infrared sensing method of the present embodiment:
Firstly, camera lens 22 is controlled by processor 28, so that subject is imaged on imaging sensor (step S402).Its
In, processor 28 is, for example, after user enables image acquiring device 20, i.e. starting instant preview (live view) mode is clapped
Image is taken the photograph, and on the display 26 by the image instant playback of subject, for user's viewing.And in the same of shooting image
When, processor 28 also can control the actuator mobile lens in camera lens 22 according to the zoom operations of user to change camera lens 22
Focal length, use provide imaging sensor 24 shoot different focal length under image.
Then, the color image (step of subject is obtained using the pixel of imaging sensor 24 by processor 28
S404).It should be noted that since the partial pixel in the infrared ray application region of imaging sensor 24 is by infrared sensing pixel
Replace, the color information of these pixels will be lacked in color image acquired in imaging sensor 24.In this regard, the present embodiment can lead to
Processor 28 is crossed using the pixel value of multiple pixels around each infrared sensing pixel, infrared ray is calculated in a manner of interpolation
The pixel value of sensor pixel position.Whereby, it can compensate for (infrared ray application region) color information lacked in color image.
While imaging sensor 24 obtains color image, processor 28 can also utilize red in infrared ray application region
The infrared view (step S406) of outside line sensor pixel acquisition subject.Wherein, processor 28 can be further red using this
Outer line image identifies biological characteristic therein, to execute corresponding function.For example, processor 28 can utilize mankind's eye
Infrared view execute iris recognition, identify the status of user captured by image acquiring device 20 whereby, and accordingly
The corresponding function of keeping secret such as unlock, decryption or authorization is executed, the present embodiment is not intended to limit its application.Alternatively, processor 28 is available
The infrared view of mankind's wrist identifies vessel position, and can judge the body of user according to the bounce or contraction of blood vessel
Situation, the present embodiment do not limit its application yet.
It should be noted that in one embodiment, image acquiring device 20 can also be directed to aforementioned infrared ray application region, aobvious
Show and prompt its corresponding region in device 26, to assist user to adjust the position of image acquiring device 20 and angle or adjust it
The position for the physical feeling to be shot and angle enable the position to fall into infrared ray application region, to implement red
Outside line application.In detail, after imaging sensor 24 obtains color image, processor 28 can for example be shown in display 26
This color image, and in this color image indicate infrared ray application region corresponding region.
For example, Fig. 5 is according to the schematic diagram for indicating infrared ray application region shown by one embodiment of the invention.Please
Referring to Fig. 5, the image acquiring device 50 of the present embodiment is, for example, mobile phone, such as can be passed according to infrared ray application region in image
Relative position in sensor indicates the corresponding region 52 of this infrared ray application region in the displayed image.Pass through corresponding area
The position to be shot (such as eye in Fig. 5) can be moved in corresponding region 52 by the mark in domain 52, user, thus
So that imaging sensor can take the infrared view at the position, and infrared ray application is executed accordingly.
Fig. 6 A to Fig. 6 C is the comparison schematic diagram according to infrared sensing method shown by one embodiment of the invention.Its
In, when needing while applying recognition of face and iris recognition, if using the image acquiring device 62 of conventional hybrid detection technology
It shoots user 60 (as shown in Figure 6A), then needs the eyeglass arranged in pairs or groups compared with narrow viewing angle, the infrared of relatively tool details can be got
Line image.If shooting user 60 (such as Fig. 6 B institute using conventional hybrid detection technology but the higher image acquiring device 64 of pixel
Show), then the infrared sensing pixel for only covering user's face area uses, the infrared sensing picture in other regions
It is plain then can not utilize, and the picture quality in these regions can be sacrificed.And it is shot according to image acquiring device 66 of the invention
User 60 (as shown in Figure 6 C) then only corresponds to the face of user 60 in the imaging sensor of image acquiring device 66
Infrared sensing pixel is configured in the region of (or eye), can not only obtain required infrared view whereby, and can be reduced pair
The influence of the picture quality of imaging sensor.
In conclusion image acquiring device and its infrared sensing method of the invention are by integrating color in single camera
Polychrome element and infrared sensing pixel, and only need to obtain the region implantation infrared ray sense of infrared view in the image sensor
Pixel is surveyed, can not only simplify the design of system hardware, reduce cost and power consumption, and can not influence or reduce to influence imaging sensor
Picture quality under, obtain required infrared view.
Although the present invention is disclosed as above with embodiment, however, it is not to limit the invention, any technical field
Middle technical staff, without departing from the spirit and scope of the present invention, when can make some changes and embellishment, therefore protection of the invention
Range is subject to view as defined in claim.
Claims (10)
1. a kind of image acquiring device characterized by comprising
Imaging sensor, including multiple pixels to sensed color, wherein described image sensor is divided into infrared ray application
Region and non-infrared ray application region, and be located in the pixel of the infrared ray application region and assigned multiple infrared ray senses
Survey pixel；
Camera lens is configured in described image sensor, and subject is made to image in described image sensor；And
Processor couples described image sensor and the camera lens, described in the pixel acquisition using described image sensor
The color image of subject, and obtain using the infrared sensing pixel infrared view of the subject.
2. image acquiring device according to claim 1, which is characterized in that the infrared ray application region is located at the figure
As the middle section of sensor.
3. image acquiring device according to claim 1, which is characterized in that the infrared ray application region is in the figure
As position and size of the position and size and two peripheral regions of the mankind in sensor in face are consistent.
4. image acquiring device according to claim 1, which is characterized in that described image acquisition device further include:
Display shows described image acquired in described image sensor, wherein the processor is also in the display institute
The corresponding region of the infrared ray application region is indicated in the described image of display.
5. image acquiring device according to claim 1, which is characterized in that the processor is including the use of each described infrared
The pixel value of infrared sensing pixel position described in the calculated for pixel values of multiple pixels around line sensor pixel.
6. image acquiring device according to claim 1, which is characterized in that in the non-infrared ray application region
Each pixel includes a red sub-pixel, a blue subpixels and two green sub-pixels, and is located at the infrared ray
Each pixel in application region includes a red sub-pixel, a blue subpixels, a green sub-pixels and one
The infrared sensing pixel.
7. a kind of infrared sensing method of image acquiring device, suitable for the figure including imaging sensor, camera lens and processor
As acquisition device, which is characterized in that the method includes the following steps:
The camera lens is controlled by the processor, so that subject is imaged on described image sensor, wherein described image is passed
Sensor is divided into infrared ray application region and non-infrared ray application region, and is located at the pixel of the infrared ray application region
In assigned multiple infrared sensing pixels；
The color image of the subject is obtained using the pixel of described image sensor by the processor；And
The infrared view of the subject is obtained using the infrared sensing pixel by the processor.
8. the method according to the description of claim 7 is characterized in that described image acquisition device further includes display, and by
Before the step of processor obtains the infrared view of the subject using the infrared sensing pixel, also
Include:
Described image acquired in described image sensor is shown in the display, and in described image as the processor
Indicate the corresponding region of the infrared ray application region.
9. the method according to the description of claim 7 is characterized in that as the processor using described in described image sensor
Pixel obtains the step of color image of the subject and includes:
It is red as described in calculated for pixel values of the processor using multiple pixels around each infrared sensing pixel
The pixel value of outside line sensor pixel position.
10. the method according to the description of claim 7 is characterized in that utilizing the infrared sensing picture by the processor
Element obtained after the step of infrared view of the subject, further includes:
Biological characteristic in the infrared view is identified by the processor, to execute corresponding function.
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| CN201710616093.4A CN109327665A (en) | 2017-07-26 | 2017-07-26 | Image acquiring device and its infrared sensing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710616093.4A CN109327665A (en) | 2017-07-26 | 2017-07-26 | Image acquiring device and its infrared sensing method |
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Cited By (1)
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| WO2021174425A1 (en) * | 2020-03-03 | 2021-09-10 | 华为技术有限公司 | Image sensor and image sensitization method |
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Application publication date: 20190212 |