CN102984848A - Optics identifier adaptive illuminating brightness control method - Google Patents
Optics identifier adaptive illuminating brightness control method Download PDFInfo
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- CN102984848A CN102984848A CN2011102702819A CN201110270281A CN102984848A CN 102984848 A CN102984848 A CN 102984848A CN 2011102702819 A CN2011102702819 A CN 2011102702819A CN 201110270281 A CN201110270281 A CN 201110270281A CN 102984848 A CN102984848 A CN 102984848A
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Abstract
The invention provides an optics identifier adaptive illuminating brightness control method. The optics identifier at least comprises a signal processor, a picture sensor and at least two luminous components inside, light sources are provided by a plurality of luminous components and light is irradiated to the surface of a target object at different angles, picture signals measured by the picture sensor are transmitted to the signal processor, after the picture signals are subjected to operation process by the signal processor, the luminous components with brightness to be changed are subjected to brightness control, rather than the luminous components are maintained in the constant brightness, so that on the base of continued acquisition of good picture signals, the electric power of power supply units is effectively used, and the problem of paper reflected light is effectively solved.
Description
Technical field
The present invention relates to a kind of technical field of optical identification device, relate in particular to a kind of can be for the in addition effectively design of control of brightness of illumination, allow limited electric power performance do the utilization of full blast and solve the problem of paper reflection light.
Background technology
Optical identification code (Optical Identification, OID) is a kind of technology that can hide numerical data and the hiding numerical data of acquisition in general printed matter.This numerical data is distributed according to preset rules by a plurality of tiny dots and a plurality of dot matrix patterns of forming, and this dot matrix pattern is quite small, and is visually out in the cold easily, does not affect to pick out the information that the tendency to develop of main figure institute reaches in the printed matter.But when wanting to read this numerical data, must use optics and image processing techniques by an optical identification device picking point system of battle formations case, carry out identification and decoding action, pick out the signal of dot matrix pattern representative.Among actual product, can use this technology to cooperate an image display device or a sound play device etc., produce relative image or sound effect according to previous signal, the talking pen that Related product such as child teaching or amusement are used.
The optical identification device of leading this type of identification is generally Portable or hand-held device, consider operational convenience, most products are all set up independently power-supply unit (such as battery etc.) in inside, provide overall operation required electric power, lasting electric power endurance is for the user, can avoid the frequent battery, reduce the inconvenience of operation, also can reduce the cost of battery, improve the satisfaction of product.
For the electric power that makes the optical identification device effectively uses, many methods are arranged, for example the present invention has designed a kind of define method of two-dimensional signal coding region, can overcome dot matrix pattern rotation or make the problem such as pattern deformation because camera angle is crooked, permit larger distortion toleance degree and improve the decoding identification, therefore can use the lower image sensor of resolution, relatively reduce power consumption.But in the structure of optical identification device, the power consumption maximum be light-emitting component, but light-emitting component is key member main in the structure also, the image quality that the bright degree direct influence of the light source that provides captures, identification has direct correlation for subsequent optical, if reduce simply the power consumption of light-emitting component, though can continue the service time of battery, but cause easily identification mistake or can't identification, then can make this product lose main purposes.
Single light-emitting component is adopted in the optical identification device of majority inside at present in addition, shine the subject matter surface in an oblique angle mode, the image sensor of this optical identification device just obtains the image of a non-uniform brightness easily thus, namely brighter apart from the nearer image of light-emitting component, otherwise then darker, although can utilize the selection of printing technology and paper to improve this problem, cost is increased, also can't thoroughly solve.And hand-held optical identification device also can't limit user's gripping custom or angle, sometimes when the internal illumination element when a special angle shines this paper, catoptrical impact will be more obvious, and so the signal noise of the picture signal that obtains of this image sensor just can't use than (S/N) is poor.
Therefore the invention provides a kind of control method of adaptability brightness of illumination, can suitably adjust brightness and be projected to the subject matter place along with the picture signal that obtains, the image of equilibrium brightness is provided, carry out identification and decoding action in the hope of obtaining good picture signal.
Summary of the invention
Main purpose of the present invention provides a kind of adaptability brightness of illumination control framework of optical identification device, can obtain the lower of best image quality, so that electric power is used effectively, allow to lengthen the service time of battery, reduce the frequency that this type of optical identification device is changed battery.
In order to achieve the above object, optical identification device of the present invention inside includes signal processor, image sensor and at least two light-emitting components at least, its method is: provide the light source irradiation of different angles in subject matter by this light-emitting component, this image sensor is sent to this signal processor with the picture signal that records, this signal processor with picture signal after calculation process, the light-emitting component that changes brightness for wish carries out brightness adjustment, but not light-emitting component is maintained a fixing brightness.
Design of the present invention provides a kind of control method of adaptability brightness of illumination, it is the non-design that fixed brightness of illumination is provided, the method can be carried out the bright-dark degree that statistical analysis goes out each position of gray scale image according to picture signal, adjust again the brightness of a plurality of light-emitting components of diverse location, and the brightness after adjusting is the minimum brightness that picture signal is carried out the light-emitting component of identification and decoding, allows electric power be used efficiently; Also can allow in addition image sensor obtain the image of equilibrium brightness, keep good picture signal, solve simultaneously the problem of paper reflection light.
Understand detailed process of the present invention and technology contents for knowing, the present invention will cooperate following accompanying drawing and detailed explanation, understand spiritual place of the present invention in the hope of knowing.
Description of drawings
Fig. 1 is the calcspar of framework of the present invention;
Fig. 2 is the plane graph of the optical read head of optical identification device of the present invention;
Fig. 3 is flow chart of the present invention.
Wherein, description of reference numerals is as follows:
10 subject matters
11 signal processors
12 image sensors
13 light-emitting components
14 power-supply units
2 optical read heads
21 lens
Embodiment
As shown in Figure 1, Fig. 1 is the block schematic diagram of the inside structure of optical identification device of the present invention.This optical identification device inside includes signal processor 11, image sensor 12, at least two light-emitting components 13 and power-supply unit 14 at least.
As shown in Figure 2, be the structural representation of the optical read head of optical identification device of the present invention, this light-emitting component 13 and image sensor 12 are arranged within the optical read head 20.Provide light source irradiation to a subject matter 10 surfaces by this light-emitting component 13 during running, this subject matter 10 is one to be printed with the paper of a plurality of dot matrix patterns, lens 21 focusing that can be through optical read head 20 in behind the part light reflection be projected to this image sensor 12 places, optical imagery is converted to electronic image signal and exports through this image sensor 12.Wherein this light-emitting component 13 is a light-emitting diode in the present embodiment, but not as limit.This image sensor 12 then can be the image sensing elements such as CCD (Charge Couple Device) or CMOS (Complementary Metal-Oxide-Semiconductor).
Because optical identification device of the present invention is hand-held device, for operational convenience, this power-supply unit 14 is made of a plurality of battery, provides overall operation required electric power.This signal processor 11 is connected with this power-supply unit 14, image sensor 12, light-emitting component 13 respectively, the electric power that power-supply unit 14 provides can be exported to this light-emitting component 13, and control the brightness of this light-emitting component 13 by the magnitude of voltage of output.This signal processor 11 that links to each other with image sensing sensor 12 in addition can with the electronic signal of image analyzing and processing in addition, such as carrying out the processing such as identification and decoding, also can judge whether the electronic signal of the image of gained is effective signal.
As shown in Figure 3, be the flow chart of the adaptability brightness of illumination control method of optical identification device.Method of the present invention is:
Step 301: shine a subject matter with different angles by a plurality of light-emitting components;
Step 302: this image sensor is sent to this signal processor with the picture signal of sensing;
Step 303: after calculation process, the light-emitting component that changes brightness for wish carries out brightness adjustment to this signal processor with picture signal, but not light-emitting component is maintained a fixing brightness.
As shown in Figure 2, in the present invention, a plurality of light-emitting components 13 are the front region that are distributed in this image sensor 12 with equal angles in this optical identification device, also be, if in this optical identification device, pass through a plurality of light-emitting components 13 with a circular sideline, the a plurality of light-emitting components 13 that are positioned on the circular sideline are interval equal angular, and this image sensor 12 that extends through by circular central.These light-emitting component 13 numbers are two in the present embodiment, 180 degree of being separated by, and this purpose is for the image that equilibrium brightness is provided gives this image sensor, and the signal noise ratio of the picture signal of this image sensor acquisition is improved.
In step 303, the gray scale image that this signal processor then provides picture signal carries out statistical analysis, judges the light and shade position of gray scale image, adjusts the brightness of the light-emitting component of relative position again, to obtain the image of equilibrium brightness.
The gray scale image that its concrete practice then provides according to picture signal for this signal processor, the GTG gradient of statistics first axial (Y-axis) and second axial (X-axis) distributes, adjust again the light-emitting component brightness of relative position, make first axially to reach the second axial GTG gradient homogenizing, obtain whereby an adaptive brightness of illumination.
And use method of the present invention, and also can make the electric power of power-supply unit do more effective utilization, for example when the gray scale image of gained is too bright, all light-emitting components 13 are downgraded brightness, maintain the cognizable minimum brightness of picture signal, reduce whereby power consumption.In addition when paper has reflective phenomenon, the regional area of the gray scale image that representative obtains can be too bright, the signal noise that causes easily is too poorer and can't use than (S/N), this moment, this signal processor was found out the light-emitting component 13 that causes the light reflection by statistical analysis, reduce this light-emitting component 13 brightness or even close, the signal noise that makes picture signal is than improving.
Comprehensive the above, the present invention utilizes signal processor according to the picture signal of image sensor, control respectively the brightness of this light-emitting component of diverse location by the calculation mechanism of inside, provide suitable brightness of illumination in the subject matter surface, also provide the image of equilibrium brightness to give image sense shadow device, except continuing to obtain the good picture signal, the electric power that also can full blast ground uses power supply unit, to extend working time, reduce the frequency of the battery of changing power supply unit, meet the application important document of patent.
The above is preferred embodiment of the present invention only, is not the scope that limits the embodiment of the invention.Be that all equalizations of doing according to Shen of the present invention claim scope change and modification, be all claim of the present invention and contain.
Claims (5)
1. the adaptability brightness of illumination control method of an optical identification device includes signal processor, image sensor and at least two light-emitting components at least in this optical identification device, it is characterized in that the method comprises:
Shine a subject matter by described at least two light-emitting components with different angles;
This image sensor is sent to this signal processor with the picture signal of institute's sensing;
After calculation process, the light-emitting component that changes brightness for wish carries out brightness adjustment to this signal processor with this picture signal.
2. such as the adaptability brightness of illumination control method of the optical identification device of claim 1, it is characterized in that described at least two light-emitting components are distributed in the front region of this image sensor in this optical identification device.
3. such as the adaptability brightness of illumination control method of the optical identification device of claim 1, it is characterized in that, if in this optical identification device, pass through described at least two light-emitting components with a circular sideline, described at least two light-emitting components that are positioned on the described circular sideline are interval equal angular, and the line stretcher by circular central is by this image sensor.
4. such as the adaptability brightness of illumination control method of the optical identification device of claim 1, it is characterized in that, this signal processor carries out statistical analysis with the gray scale image that this picture signal provides, declare the light and shade position that this gray scale image, adjust again the brightness of the light-emitting component of relative position, to obtain the image of equilibrium brightness.
5. such as the adaptability brightness of illumination control method of the optical identification device of claim 4, it is characterized in that, this gray scale image statistics first that this signal processor obtains according to this picture signal axially reaches the second axial GTG gradient and distributes, adjust again the brightness of the light-emitting component of relative position, make first axially and the second axial GTG gradient homogenizing, and first is axially axially mutual vertical with second.
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| CN2011102702819A CN102984848A (en) | 2011-09-06 | 2011-09-06 | Optics identifier adaptive illuminating brightness control method |
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| CN1423236A (en) * | 2001-11-30 | 2003-06-11 | 三洋电机株式会社 | Reading method for 2-D bar code |
| CN1648841A (en) * | 2004-01-07 | 2005-08-03 | 微软公司 | Universal computing device |
| CN201363612Y (en) * | 2008-11-20 | 2009-12-16 | 徐一华 | Light source with brightness being automatically adjusted for image measuring instrument |
| CN101821749A (en) * | 2007-09-21 | 2010-09-01 | 西尔弗布鲁克研究股份有限公司 | The coding pattern that comprises the direction code |
| US20110192967A1 (en) * | 2010-02-08 | 2011-08-11 | Llc Fluorescent Information Technology | Device for reading luminescent symbols and images |
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2011
- 2011-09-06 CN CN2011102702819A patent/CN102984848A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1423236A (en) * | 2001-11-30 | 2003-06-11 | 三洋电机株式会社 | Reading method for 2-D bar code |
| CN1648841A (en) * | 2004-01-07 | 2005-08-03 | 微软公司 | Universal computing device |
| CN101821749A (en) * | 2007-09-21 | 2010-09-01 | 西尔弗布鲁克研究股份有限公司 | The coding pattern that comprises the direction code |
| CN201363612Y (en) * | 2008-11-20 | 2009-12-16 | 徐一华 | Light source with brightness being automatically adjusted for image measuring instrument |
| US20110192967A1 (en) * | 2010-02-08 | 2011-08-11 | Llc Fluorescent Information Technology | Device for reading luminescent symbols and images |
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Application publication date: 20130320 |