CN102645984B - Image extraction deice applied for optical index device - Google Patents
Image extraction deice applied for optical index device Download PDFInfo
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- CN102645984B CN102645984B CN201110042002.3A CN201110042002A CN102645984B CN 102645984 B CN102645984 B CN 102645984B CN 201110042002 A CN201110042002 A CN 201110042002A CN 102645984 B CN102645984 B CN 102645984B
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Abstract
The invention discloses an image extraction device applied for an optical index device. The image extraction device is used for the optical index device and comprises a plurality of image sensing units which are adjacently arranged, wherein the image sensing units are used for sensing a surface image and producing a sensing signal, and the sensing signal can be used for estimating the moving speed of the optical index device. According to the image extraction device, the surface image can be sensed by the different distributed image sensing units according to the moving speed. When the optical index device is moved at the first moving speed, the image extraction device sets that the surface image is sensed by a plurality of image sensing units which are distributed in a small occupied area. When the optical index device is moved at the second moving speed, the image extraction device sets that the surface image is sensed by a plurality of image sensing units which are distributed in a large occupied area, wherein the first moving speed is lower than the second moving speed. According to the device disclosed by the invention, space resolution and the moving speed of tracking the optical index device can be considered at the same time without additionally increasing area of the image sensing units.
Description
Technical field
The present invention relates to optical index device, be particularly applied to the image acquiring apparatus of optical index device.
Background technology
Index device, such as mouse, detect for a kind of it the to support plane device of displacement relative to one.User can palm when held one index device, and makes it at a sliding on planes.This index device can calculate its distance relative to this in-plane displancement, and uses it as the input signal of computer.Traditional index device installs the rolling amount of roller thereon relative to a plane to calculate its rolling degree according to one.But the index device of roller type can increase along with access times, and accumulation dust consequently disturbs the calculating of its displacement.Therefore, along with scientific-technical progress, optical index device, such as optical mouse, replace the index device of traditional roller type gradually.
Optical index device is equally also detect it supports the displacement of plane device relative to one.Be different from the index device of traditional roller type, optical index device calculates its displacement according to the reflection of light.Fig. 1 shows the schematic diagram of a known optical index device.As shown in Figure 1, this optical index device 100 comprises light source 102, condenser lens 104, intercepting lens 106, sensing apparatus 108 and a processing unit 110.This light source 102 may be a diode light-source or a LASER Light Source, and by this condenser lens 104 throw light in a plane 150.This light forms reflection in this plane 150, and via this intercepting reflection from lens to this sensing apparatus 108.The signal that this processing unit 110 can utilize this sensing apparatus 108 to export calculates the shift length of this optical index device 100 relative to this plane 150.
Fig. 2 shows the enlarged diagram of this sensing apparatus 108.As shown in Figure 2, this sensing apparatus 108 comprises multiple image sensing unit 200 in arrayed.Described multiple image sensing unit 200 can catch the image of this plane 150 and produce sensing signal accordingly.The relevance (correlation) of this processing unit 110 namely between more continuous two images, and determine the shift length between this optical index device 100 and this plane 150 according to the orientation of higher relevance and degree.Such as, if via known second image of comparison result of this processing unit 110 and first image higher in upper left relevance, then can determine that this optical index device 100 moves compared to this plane 150 toward lower right.
Generally speaking, for the image sensing unit 200 of same quantity, its unit area is larger, and resolution is poorer.But if the unit area of described multiple image sensing unit 200 is less, its detectable displacement range is also less.In other words, no matter the size of described multiple image sensing unit 200 area, the performance of this optical index device 100 all can be therefore limited.Have the optical index device of large-area image sensing unit, its poor resolution can allow user have slack vernier to move experience.Otherwise, there is the optical index device of the image sensing unit of small size, its can increase distance that user moves this optical index device with obtain the accuracy of wish input signal, but the scope detecting displacement diminishes.
Summary of the invention
The invention provides a kind of image acquiring apparatus being applied to optical index device, it can in conjunction with the advantage of the image sensing unit of different area to adapt to different user demands.
A kind of image acquiring apparatus of the present invention, for an optical index device, comprises the image sensing unit of multiple arranged adjacent.Described multiple image sensing unit is in order to sense the image on a surface and to produce a sensing signal, and this sensing signal can in order to estimate the translational speed of this optical index device.This image acquiring apparatus can utilize the image sensing unit of different distributions to sense the image on this surface according to this translational speed.When this optical index device moves with one first translational speed, the setting of this image acquiring apparatus senses the image on this surface with the multiple image sensing unit occupying small size distribution.When this optical index device moves with one second translational speed, the setting of this image acquiring apparatus senses the image on this surface with the multiple image sensing unit occupying large area distribution, and wherein this first translational speed is less than this second translational speed.
Another kind of image acquiring apparatus of the present invention, for an optical index device, comprises the image sensing unit of multiple arranged adjacent.Described multiple image sensing unit is in order to sense the image on a surface and to produce a sensing signal, and this sensing signal can in order to estimate the translational speed of this optical index device.This image acquiring apparatus can utilize the image sensing unit of different distributions to sense the image on this surface according to this translational speed.When this optical index device moves with one first translational speed, the setting of this image acquiring apparatus senses the image on this surface with spatial resolution (Counts Per Inch, CPI) much higher image sensing unit.When this optical index device moves with one second translational speed, the setting of this image acquiring apparatus senses the image on this surface with multiple image sensing unit that spatial resolution is low, wherein this first translational speed is less than this second translational speed.
The image acquiring apparatus being applied to optical index device of the present invention can utilize the image sensing unit of different distributions to sense the image on a surface according to the translational speed of this optical index device.Accordingly, this image acquiring apparatus can be taken into account spatial resolution when additionally not increasing image sensing unit area simultaneously and follow the trail of the translational speed of this optical index device.
Sketch out technical characteristic of the present invention above, is obtained better understanding to make detailed description hereafter.Other technical characteristic forming the scope of the claims target of the present invention will be described in hereafter.Persons of ordinary skill in the technical field of the present invention should understand, and the concept hereafter disclosed and specific embodiment can be used as basis and revised or design other structure or technique quite easily and realize the object identical with the present invention.Persons of ordinary skill in the technical field of the present invention also should understand, and the construction of this kind of equivalence also cannot depart from the spirit and scope of the present invention that appended claim proposes.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the known optical index device of display one;
Fig. 2 is the enlarged diagram of the image sensing unit of the known optical index device of display one;
Fig. 3 is the schematic diagram of the image acquiring apparatus of display one embodiment of the invention;
Fig. 4 is the enlarged diagram of the image sensing unit of the image acquiring apparatus of display one embodiment of the invention;
Fig. 5 is the process flow diagram of display according to the method for the movement value of the calculating optical index device of one embodiment of the invention; And
Fig. 6 is the enlarged diagram of the image sensing unit of the image acquiring apparatus of display another embodiment of the present invention.
Description of reference numerals in above-mentioned accompanying drawing is as follows:
100 optical index devices
102 light sources
104 condenser lenses
106 intercept lens
108 sensing apparatus
110 processing units
150 planes
200 image sensing unit
300 image acquiring apparatus
302 image sensing unit
304 storage unit
306 processing units
350 optical index devices
360 planes
402 image sensing unit
404 image sensing unit
501 ~ 509 steps
602 image sensing unit
604 image sensing unit
606 image sensing unit
Embodiment
The present invention is a kind of image acquiring apparatus being applied to optical index device in the direction that this inquires into.In order to the present invention can be understood up hill and dale, by following description, detailed composition is proposed.Apparently, execution of the present invention is not defined in the specific details that person skilled in the art of the present invention has the knack of.On the other hand, well-known composition is not described in details, to avoid the restriction causing the present invention unnecessary.Preferred embodiment of the present invention can be described in detail as follows, but except these are described in detail, the present invention can also implement in other examples widely, and scope of the present invention not circumscribed, it is as the criterion with appended claim.
Fig. 3 is the schematic diagram being applied to the image acquiring apparatus of optical index device of display one embodiment of the invention.As shown in Figure 3, this image acquiring apparatus 300 is installed in an optical index device 350, and comprises image sensing unit 302, storage unit 304 and a processing unit 306 of multiple arranged adjacent.This optical index device 350 slides relative to a plane 360.Described multiple image sensing unit 302 is in order to sense the image on a surface and to produce a sensing signal, and wherein this sensing signal can in order to estimate the translational speed of this optical index device 350.The sensing signal that this storage unit 304 produces in order to store described multiple image sensing unit 302.This processing unit 306 in order to the sensing signal that compares sensing signal stored by this storage unit 304 and described multiple image sensing unit 302 and produce to calculate the movement value of this optical index device 350.
Fig. 4 is the enlarged diagram showing described multiple image sensing unit 302.As shown in Figure 4, the core of described multiple image sensing unit 302 comprises the image sensing unit 402 of totally 256 small sizes.The periphery of described multiple image sensing unit 302 comprises 192 large-area image sensing unit 404, and wherein the area of each large-area image sensing unit 404 is four times of the area of the image sensing unit 402 of each small size.
Join Fig. 3 again, this image acquiring apparatus 300 can utilize the image sensing unit 302 of different distributions to sense the image on this surface 360 according to the translational speed of this optical index device 350, when this optical index device 350 moves with one first translational speed, this image acquiring apparatus 300 sets the image sensing this surface 360 with the image sensing unit 402 of described multiple small size, when this optical index device 350 moves with one second translational speed, this image acquiring apparatus 300 sets the image sensing this surface 360 with described multiple large-area image sensing unit 404, and this first translational speed is less than this second translational speed.Image sensing unit 402 due to described multiple small size forms a undersized induction range, and when this optical index device 350 is to move at a slow speed, this image acquiring apparatus 300 sets and senses this surface 360 with a undersized induction range.In like manner, when this optical index device 350 is to move fast, this image acquiring apparatus 300 sets and senses this surface 360 with a large-sized induction range.When user is with this optical index device 350 mobile at a slow speed, user mostly expects and obtains computer input signal more accurately.The high-res that the undersized induction range that the image sensing unit 402 of described multiple small size is formed provides be able to reach this function.When user is to move this optical index device 350 fast, large-sized induction range that described multiple large-area image sensing unit 404 is formed can provide the function of following the trail of at a high speed this optical index device 350 motion track.Accordingly, this image acquiring apparatus 300 can provide different sensing modes according to different service condition.
In another embodiment of the invention, described multiple image sensing unit 302 comprises the image sensing unit of high spatial resolution and low spatial resolution.When user is to move at a slow speed this optical index device 350, this image acquiring apparatus 300 senses the image on this surface 360 with the image sensing unit 302 of described multiple high spatial resolution.When user is with this optical index device 350 of high-speed mobile, this image acquiring apparatus 300 senses the image on this surface 360 with the image sensing unit 302 of described multiple low spatial resolution.
Fig. 5 is the process flow diagram of display according to the method for the movement value of the calculating optical index device of one embodiment of the invention, and wherein the method can be applicable to this processing unit 306.In step 501, utilize an optical index device to sense a surface to produce one first picture signal, and enter step 502.In step 502, utilize this optical index device to sense this surface to produce one second picture signal, and enter step 503.In step 503, calculate this optical index device in the shift value of horizontal direction and vertical direction according to this first picture signal and this second picture signal, and enter step 504.In step 504, judge whether be in a fast state at present.If the determination result is YES, then enter step 505, otherwise enter step 506.In step 505, this optical index device of comparison is in the shift value of horizontal direction and vertical direction.If this optical index device is less than one first horizontal critical value in the shift value of horizontal direction, and this optical index device is less than one first vertical critical value in the shift value of vertical direction, then enter step 507, otherwise enter 508.In step 506, this optical index device of comparison is in the shift value of horizontal direction and vertical direction.If this optical index device is greater than one second horizontal critical value in the shift value of horizontal direction, or this optical index device is greater than one second vertical critical value in the shift value of vertical direction, then enter step 508, otherwise enter 507.In step 507, decision current state is lower-speed state, and using undersized induction range as the sensing range of this optical index device, and enter step 509.In step 508, decision current state is fast state, and using large-sized induction range as the sensing range of this optical index device, and enter step 509.In step 509, judge whether method ends.If so, then method ends, otherwise get back to step 501.
Fig. 6 is the enlarged diagram of the image sensing unit of the image acquiring apparatus of display another embodiment of the present invention.As shown in Figure 6, the core of described multiple image sensing unit 600 comprises the image sensing unit 602 of totally 256 small sizes.The periphery of described multiple image sensing unit 600 comprises totally 192 large-area image sensing unit 604.Described multiple image sensing unit 600 comprises the image sensing unit 606 of 192 middle areas between the part between the image sensing unit 602 and described multiple large-area image sensing unit 604 of described multiple small size.Accordingly, the sensing range of described multiple image sensing unit 600 namely by utilizing described multiple image sensing unit 602,604 or 606 of different size to provide high-res or low-res with the translational speed adapting to this image acquiring apparatus.
The image sensing unit of image acquiring apparatus of the present invention is not limited to Outside Dimensions greatly, the laying mode that center size is little.In section Example of the present invention, the size being positioned at middle image sensing unit is greater than the size being positioned at peripheral image sensing unit.Even in section Example of the present invention, the size of described multiple image sensing unit is all equal.Image acquiring apparatus of the present invention is not limited to each pixel that this image acquiring apparatus exports and namely corresponds to the pixel data that each image sensing unit exports.When sensing range sensing one surface of image acquiring apparatus of the present invention setting with large area or low spatial resolution, each pixel of the sensing signal that described multiple image extraction unit produces produces by the pixel data combining multiple adjacent image sensing unit and extract, and the combination of the pixel data that wherein said multiple adjacent image sensing unit extracts can utilize combination of pixels technology.In another embodiment of the invention, when sensing range sensing one surface of image acquiring apparatus of the present invention setting with large area or low spatial resolution, each pixel of the sensing signal that described multiple image extraction unit produces produced according to one of them pixel data extracted of multiple adjacent image sensing unit.
In sum, the image acquiring apparatus being applied to optical index device of the present invention can utilize the image sensing unit of different distributions to sense the image on a surface according to the translational speed of this optical index device.Accordingly, this image acquiring apparatus can be taken into account spatial resolution when additionally not increasing image sensing unit area simultaneously and follow the trail of the translational speed of this optical index device.
Technology contents of the present invention and technical characterstic disclose as above, but those skilled in the art still may do all replacement and the modification that do not deviate from spirit of the present invention based on teaching of the present invention and announcement.Therefore, protection scope of the present invention should be not limited to that embodiment discloses, and should comprise various do not deviate from replacement of the present invention and modification, and is contained by appended claim.
Claims (22)
1. an image acquiring apparatus, for an optical index device, comprises:
The image sensing unit of multiple arranged adjacent, in order to sense the image on a surface and to produce a sensing signal, this sensing signal is in order to estimate the translational speed of this optical index device;
Wherein this image acquiring apparatus utilizes the image sensing unit of different distributions to sense the image on this surface according to this translational speed, when this optical index device moves with one first translational speed, the setting of this image acquiring apparatus senses the image on this surface with the multiple image sensing unit occupying small size distribution, when this optical index device moves with one second translational speed, the setting of this image acquiring apparatus senses the image on this surface with the multiple image sensing unit occupying large area distribution, and this first translational speed is less than this second translational speed; And, when this optical index device moves with this first translational speed, the setting of this image acquiring apparatus senses this surface with a first size scope, when this optical index device moves with this second translational speed, the setting of this image acquiring apparatus senses this surface with one second range of size, and this first size scope is less than this second range of size; Described image acquiring apparatus also comprises:
One storage unit, in order to store the sensing signal that described multiple image sensing unit produces; And
One processing unit, in order to compare sensing signal that sensing signal stored by this storage unit and described multiple image sensing unit produce to calculate the movement value of this optical index device, and control this image acquiring apparatus according to this movement value and be set in this first size scope or this second range of size.
2. image acquiring apparatus as claimed in claim 1, wherein this processing unit can determine the translational speed of this optical index device according to calculated horizontal movement value and vertical movement value.
3. image acquiring apparatus as claimed in claim 2, the horizontal movement value wherein calculated when this processing unit is less than one first horizontal critical value, and the vertical movement value that this processing unit calculates is when being less than one first vertical critical value, this processing unit determines that this optical index device moves with this first translational speed, and work as calculated horizontal movement value and be greater than one second horizontal critical value, or the vertical movement value calculated is when being greater than one second vertical critical value, this processing unit determines that entering this optical index device moves with this second translational speed.
4. image acquiring apparatus as claimed in claim 1, described multiple image sensing unit of wherein this large area distribution corresponds to all image sensing unit.
5. image acquiring apparatus as claimed in claim 1, described multiple image sensing unit of wherein this small size distribution corresponds to the adjacent image sensing unit in local.
6. image acquiring apparatus as claimed in claim 1, when its setting senses this surface with described multiple image sensing unit of large area distribution, the pixel data that each pixel of the sensing signal that described multiple image extraction unit produces is extracted by the multiple adjacent image sensing unit of combination produced.
7. image acquiring apparatus as claimed in claim 1, when its setting senses this surface with described multiple image sensing unit of large area distribution, each pixel of the sensing signal that described multiple image extraction unit produces produced according to one of them pixel data extracted of multiple adjacent image sensing unit.
8. image acquiring apparatus as claimed in claim 6, the combination of the pixel data that wherein said multiple adjacent image sensing unit extracts utilizes combination of pixels technology to complete.
9. image acquiring apparatus as claimed in claim 1, the size of wherein said multiple image sensing unit is all equal.
10. image acquiring apparatus as claimed in claim 1, wherein in the image sensing unit of described multiple arranged adjacent, the size being positioned at middle image sensing unit is less than the size being positioned at peripheral image sensing unit.
11. image acquiring apparatus as claimed in claim 1, wherein in the image sensing unit of described multiple arranged adjacent, the size being positioned at middle image sensing unit is greater than the size being positioned at peripheral image sensing unit.
12. 1 kinds of image acquiring apparatus, for an optical index device, comprise:
The image sensing unit of multiple arranged adjacent, in order to sense the image on a surface and to produce a sensing signal, this sensing signal is in order to estimate the translational speed of this optical index device;
Wherein this image acquiring apparatus utilizes the image sensing unit of different distributions to sense the image on this surface according to this translational speed, when this optical index device moves with one first translational speed, the setting of this image acquiring apparatus senses the image on this surface with spatial resolution much higher image sensing unit, when this optical index device moves with one second translational speed, the setting of this image acquiring apparatus senses the image on this surface with multiple image sensing unit that spatial resolution is low, and this first translational speed is less than this second translational speed; And, when this optical index device moves with this first translational speed, the setting of this image acquiring apparatus senses this surface with a first size scope, when this optical index device moves with this second translational speed, the setting of this image acquiring apparatus senses this surface with one second range of size, and this first size scope is less than this second range of size; Described image acquiring apparatus also comprises:
One storage unit, in order to store the sensing signal that described multiple image sensing unit produces; And
One processing unit, in order to compare sensing signal that sensing signal stored by this storage unit and described multiple image sensing unit produce to calculate the movement value of this optical index device, and control this image acquiring apparatus according to this movement value and be set in this first size scope or this second range of size.
13. image acquiring apparatus as claimed in claim 12, wherein this processing unit can determine the translational speed of this optical index device according to calculated horizontal movement value and vertical movement value.
14. image acquiring apparatus as claimed in claim 13, the horizontal movement value wherein calculated when this processing unit is less than one first horizontal critical value, and the vertical movement value that this processing unit calculates is when being less than one first vertical critical value, this processing unit determines that this optical index device moves with this first translational speed, and work as calculated horizontal movement value and be greater than one second horizontal critical value, or the vertical movement value calculated is when being greater than one second vertical critical value, this processing unit determines that entering this optical index device moves with this second translational speed.
15. image acquiring apparatus as claimed in claim 12, the image sensing unit that wherein said multiple spatial resolution is high corresponds to all image sensing unit.
16. image acquiring apparatus as claimed in claim 12, the image sensing unit that wherein said multiple spatial resolution is low corresponds to the adjacent image sensing unit in local.
17. image acquiring apparatus as claimed in claim 12, when its setting senses this surface with the image sensing unit that described multiple spatial resolution is high, the pixel data that each pixel of the sensing signal that described multiple image extraction unit produces is extracted by the multiple adjacent image sensing unit of combination produced.
18. image acquiring apparatus as claimed in claim 12, when its setting senses this surface with the image sensing unit that described multiple spatial resolution is high, each pixel of the sensing signal that described multiple image extraction unit produces produced according to one of them pixel data extracted of multiple adjacent image sensing unit.
19. image acquiring apparatus as claimed in claim 17, the combination of the pixel data that wherein said multiple adjacent image sensing unit extracts utilizes combination to represent the simulating signal of the pixel data that described multiple adjacent image sensing unit extracts or digital signal completed.
20. image acquiring apparatus as claimed in claim 12, the size of wherein said multiple image sensing unit is all equal.
21. image acquiring apparatus as claimed in claim 12, wherein in the image sensing unit of described multiple arranged adjacent, the size being positioned at middle image sensing unit is less than the size being positioned at peripheral image sensing unit.
22. image acquiring apparatus as claimed in claim 12, wherein in the image sensing unit of described multiple arranged adjacent, the size being positioned at middle image sensing unit is greater than the size being positioned at peripheral image sensing unit.
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| CN1510395A (en) * | 2002-11-21 | 2004-07-07 | 艾勒博科技股份有限公司 | Optical positioning system and method for computing this optical positioning system moving value |
| CN101349954A (en) * | 2007-07-18 | 2009-01-21 | 艾勒博科技股份有限公司 | Optical pointing device and automatic gain control method thereof |
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| US7714844B2 (en) * | 2006-04-21 | 2010-05-11 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Dynamic self-switchable CPI resolution for an optical mouse sensor |
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| CN1510395A (en) * | 2002-11-21 | 2004-07-07 | 艾勒博科技股份有限公司 | Optical positioning system and method for computing this optical positioning system moving value |
| CN101349954A (en) * | 2007-07-18 | 2009-01-21 | 艾勒博科技股份有限公司 | Optical pointing device and automatic gain control method thereof |
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