CN103729071A - Optical navigation device and method - Google Patents
Optical navigation device and method Download PDFInfo
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- CN103729071A CN103729071A CN201210392830.4A CN201210392830A CN103729071A CN 103729071 A CN103729071 A CN 103729071A CN 201210392830 A CN201210392830 A CN 201210392830A CN 103729071 A CN103729071 A CN 103729071A
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Abstract
The invention discloses an optical navigation device. The optical navigation device comprises a light source, an image sensor and a controller, wherein the light source is used for lighting the surface to form an image; the image sensor is used for acquiring frames in the image; the controller is used for calculating a first estimated speed of the optical navigation device according to the first frame in the multiple frames and the second frame located behind the first frame, and controlling at least one of following parameters according to the first estimated speed, wherein the parameters comprise non-lighting frequency that the light source does not light the frames behind the second frame, non-acquisition frequency that the image sensor does not acquire the frames behind the second frame, calculation frequency that the controller calculates the frames which are acquired by the image sensor and are behind the second frame and a search range of the frames behind the second frame.
Description
Technical field
The present invention relates to a kind of optical navigator and optical navigation method, particularly about a kind of optical navigator and optical navigation method of estimating the translational speed of optical navigator and adjusting according to this polishing frequency.
Background technology
Optical navigator of the prior art, can be first with surface of a light illumination to form an image, then with the picture frame in an image sensor pick-up image, and carry out tracking for the translational speed that each picture frame in image calculates to calculate optical navigator one by one.
Refer to Fig. 1, it has illustrated an optical mouse 100 of prior art, and optical mouse is the one of optical navigator.As shown in Figure 1, optical mouse 100 has comprised a light source 101, controller 103, an image sensor 105, and light source 101, controller 103 and image sensor 105 are co-located on circuit board 107.And optical mouse 100 has further comprised that a battery 109 is in order to provide electric energy to optical mouse 100.Light source 101 for example, in order to the surface 102 (desktop that mouse is placed) of throwing light on to form an image.Image sensor 105 is in order to the picture frame in pick-up image (frame).103 picture frames that capture according to image sensor 105 of controller calculate the speed of optical mouse 100 and acceleration to follow the trail of action.
Refer to Fig. 2, it has illustrated the tracking action of this optical mouse 100.As shown in Figure 2, the acquisition picture frame that optical mouse 100 can be continuous continuous execution calculating action calculate speed and the acceleration of optical mouse 100.But, such mode because light source 101 incessantly effects on surface 102 throw light on, constantly pick-up image of image sensor 105, and controller 103 also must constantly calculate, and quite consumes electric energy.Particularly optical navigator, when high-speed mobile, because can increase the difficulty of tracking, can be carried out illumination, pick-up image and calculating with upper frequency, and therefore calculated amount and power consumption can increase significantly.Modern electronic installation constantly towards light and handy mini direction in evolution, therefore the volume of battery 109 can be very restricted, minimizing can be also followed in electric power storage, therefore can cause the optical navigator of optical mouse and so on the hypodynamic problem of continuing a journey.
Summary of the invention
Therefore, an object of the present invention is openly a kind of optical navigator and optical navigation method of saving electric energy.
One embodiment of the present of invention disclose a kind of optical navigator, comprise: light source, in order to illumined surface with form image; Image sensor, in order to capture the picture frame in this image; And controller, according to the first picture frame in the plurality of picture frame and position, the second picture frame after this first picture frame calculates the first estimated speed of this optical navigator, and according to wherein one at least of this first estimated speed control following parameters: whether this light source do not capture the search area that or not frequency, this controller and calculate the picture frame after calculated rate and this second picture frame of the picture frame being captured by this image sensor after this second picture frame of picture frame after this second picture frame to not illumination frequencies, this image sensor of the picture frame illumination after this second picture frame.
One embodiment of the present of invention disclose a kind of optical navigator, comprise: light source, in order to illumined surface with form image, image sensor, in order to capture the picture frame in this image, and controller, according to the first picture frame in the plurality of picture frame and position, the second picture frame after this first picture frame calculates the first estimated speed of this optical navigator, and define picture frame group according to this first estimated speed, this picture frame group has comprised multiple picture frames with this second picture frame, and according to wherein one at least of this first estimated speed control following parameters: this light source is the not illumination frequencies to the picture frame illumination in this picture frame group not, what this image sensor did not capture picture frame in this picture frame group does not capture frequency, this controller calculates the search area of the picture frame in calculated rate and this picture frame group of the picture frame being captured by this image sensor in this picture frame group.
In other embodiment of the present invention, also proposed a kind of optical navigation method, this optical navigation method can comprise the action of carrying out aforementioned optical navigator, does not repeat them here.
According to aforesaid embodiment, the present invention not only can adjust not illumination frequencies according to the operating state of optical navigator, do not capture frequency and calculated rate is saved electric energy, more can adjust search area size and save calculated amount, more to reduce the consumption of energy.
Accompanying drawing explanation
Fig. 1 has illustrated an optical mouse of prior art.
Fig. 2 has illustrated the tracking action of the optical mouse shown in Fig. 1.
Fig. 3 has illustrated the tracking action schematic diagram of optical navigator disclosed in this invention under fast mode.
Fig. 4 has illustrated the tracking action schematic diagram of optical navigator disclosed in this invention under middle fast mode.
Fig. 5 has illustrated the tracking action schematic diagram of optical navigator disclosed in this invention under low-speed mode.
Fig. 6 has illustrated the tracking action flow chart of optical navigator disclosed in this invention.
Wherein, description of reference numerals is as follows:
100 optical mouse
101 light sources
103 controllers
105 image sensors
107 circuit boards
109 batteries
601-625 step
Embodiment
In the middle of instructions and claim above, used some vocabulary to censure specific element.Person with usual knowledge in their respective areas should understand, and hardware manufacturer may be called same element with different nouns.This instructions and claim above are not used as distinguishing the mode of element with the difference of title, but the difference in function is used as the criterion of distinguishing with element.In the whole text, in the middle of instructions and claim above, be an open term mentioned " comprising ", therefore should be construed to " comprise but be not limited to ".
The tracking action schematic diagram of optical navigator disclosed in this invention will be described in detail below, it is noted that, following description explains as example using the optical mouse 100 shown in Fig. 1, but does not represent that content disclosed in this invention only can carry out by the optical mouse 100 shown in Fig. 1.Other has light source, image sensor and in order to control in the scope that the optical navigator of controller of light source and image sensor all should contain in the present invention.In disclosed embodiment of this invention, be also to form an image, and with the picture frame in image sensor 105 pick-up images by light source 101 illumined surface 102 in optical mouse 100.But controller 103 constantly makes light source 101 illumined surface 102 as can be not as shown in Figure 2, also can calculate the picture frame of acquisition disconnectedly, but can be according to first picture frame in picture frame and position second picture frame after the first picture frame calculate first estimated speed of optical mouse, and judge that according to the first estimated speed optical mouse 100 is at that velocity mode, to define a picture frame group (Group of Pictures, GOP).The second picture frame can continue after the first picture frame, or at least one picture frame of being separated by, and beneath embodiment all illustrates after the first picture frame to continue, but is not in order to limit the present invention.This picture frame group has comprised multiple picture frames with this second picture frame.In addition, controller 103 is with the wherein one at least of speed-mode control following parameters of judgement: to one of the picture frame illumination after this second picture frame, illumination frequencies, image sensor 105 do not capture of picture frame after this second picture frame and do not capture frequency, controller 103 and calculate a search area of the picture frame after calculated rate and second picture frame of the picture frame that captured by this image sensor after these second picture frames to light source 101.
In the following embodiments, optical mouse can judge to be position at that at a high speed, in middling speed and low-speed mode according to the first estimated speed.Refer to Fig. 3, it has illustrated the tracking action schematic diagram of optical navigator disclosed in this invention under fast mode.In Fig. 3, controller 103 can calculate according to picture frame 0 and 1 (aforesaid the first picture frame and the second picture frame) first estimated speed of optical mouse 100, wherein last picture frame in a upper picture frame group of picture frame 0.And to judge optical mouse 100 according to the first estimated speed should be to belong to fast mode, and determine picture frame group's length (comprise in how many picture frames, this example is 16 picture frame 1-16), the frequency of pick-up image (also having represented the frequency of not throwing light on) not according to this.In the embodiment shown in fig. 3, picture frame group's size is configured to 16 picture frames, and 16 picture frames in picture frame group can suppose that its speed is to calculate according to picture frame 0 and 1 the speed of going out.Therefore part picture frame can not captured and be calculated, and for example picture frame 2,5-7,10-15, to reduce illumination and to calculate required electric energy.
But, when processing same picture frame group's picture frame, can follow and according to picture frame 0 and 1, calculate the trend (this is under that velocity mode) at the beginning and process whole picture frame group, but also can calculate and new trend more for part picture frame.In Fig. 3 to Fig. 4, between picture frame, with the curve of arrow, represented and calculated action.For example between picture frame 3 and 4, with the curve of arrow, just represented that picture frame 3 and 4 is used to calculate.Under the fast mode of Fig. 3, speed is fast but acceleration is little, therefore to capture continuous two picture frames, calculates (but not limiting).For instance, calculate picture frame 3 and 4, and calculate picture frame 8 and 9.And because acceleration is little, therefore do not need that the picture frame in picture frame group is calculated to too many time, carry out correction trend, therefore in the embodiment shown in Fig. 3, only calculated the picture frame 3 and 4 in picture frame group, and picture frame 8 and 9.Please be careful the speed and the acceleration that according to the picture frame in picture frame group, calculate also can be in order to change velocity mode, and for example fast mode from fast mode becomes will be described down below in addition.And handling after picture frames all in picture frame group, controller 103 originally last picture frame 16 in picture frame calculates after the second estimated speed with next picture frame 17, first picture frame using picture frame 17 as next picture frame group, continues aforesaid action.
If judge optical mouse 100 in middle fast mode according to picture frame 0 and 1, its embodiment that follows the trail of action and Fig. 3 can be different.Fig. 4 has illustrated the tracking action schematic diagram of optical navigator disclosed in this invention under middle fast mode.Under middle fast mode, velocity amplitude is less, must not capture continuous picture frame, therefore the discontinuous picture frame 4,6 and 8 of the embodiment fechtable in Fig. 4.But because acceleration may be larger, the picture frame that must calculate more continually in picture frame group guarantees that the trend calculating according to picture frame 0 and 1 is correct.Therefore in the embodiment of Fig. 4, picture frame 1,4,6,8 and 9 all guarantees in order to the speed of calculating between it accuracy of predicting.
If judge optical mouse 100 according to picture frame 0 and 1, be in low-speed mode, its embodiment that follows the trail of action and Fig. 3, Fig. 4 also can be different.Fig. 5 has illustrated the tracking action schematic diagram of optical navigator disclosed in this invention under low-speed mode.Under this pattern, optical mouse 100 is obviously motion not, and the frequency of illumination and pick-up image can drop to minimum, therefore in the embodiment of Fig. 5 except initial picture frame 1, only captured picture frame 8, to reduce the power consumption of illumination.But, in this situation, for fear of idle period, slip up, can reduce picture frame group's quantity, therefore the quantity of the picture frame group in Fig. 5 embodiment is configured to 8, rather than is configured to 16 as Fig. 3 and Fig. 4.
Except reducing the frequency of acquisition picture frame and calculating, the present invention has more proposed to change according to friction speed pattern the concept of search area, and so-called search area refers to the pixel coverage size that a picture frame is contained.The picture frame that search area is large can be easier to find out the trend that image changes, but needs larger calculated amount.On the contrary, the picture frame that search area is little is not easy to find out the trend that image changes, but required calculated amount is less.In the embodiments of figure 3, because picture frame 0 and 1 is the use of finding out trend and decision speed, therefore use larger search area 9x9 (being that picture frame length and width are all 9 pixels).And after having determined speed and trend, can be considered that picture frame changes more stable, therefore can dwindle search area, therefore picture frame 3 and 4 is used less search area 5x5.And a period of time does not capture after picture frame, possible trend can change to some extent, therefore sets picture frame 8 and 9 for 7x7.
And in the embodiment of Fig. 4, the larger search area 9x9 of picture frame 0 use the same as 1, but because of under fast mode trend change fiercer, therefore picture frame 4 does not have to use less search area 5x5, but use the search area 7x7 taking second place, and follow-up picture frame 6,8,9 is because trend tends towards stability and used less search area 5x5.
And in the embodiment of Fig. 5, because change quite littlely, the ratio that therefore captures picture frame as is as previously mentioned lower, but also because like this, picture frame 0,1 and 8,9 all use maximum search area 9x9, when guaranteeing to capture picture frame at every turn and calculating according to this, can calculate very soon picture frame group's trend.Aforesaid search area setting only, in order to for example, is known this skill person when setting arbitrarily search area according to aforesaid teaching, and it is de-scope of the present invention also.
As previously mentioned, the present invention is not limited only to calculate after estimated speed and trend by first two picture frames, just follow this trend to process remaining picture frame in picture frame group always, it can calculate after another estimated speed according to other picture frame in picture frame group, upgrade estimated speed, and calculate after acceleration with previous estimated speed, judge whether to change trend, or the new velocity mode of no employing.And according to the frequency of judged result change picture frame group's picture frame number and acquisition picture frame.Take Fig. 3 as example, it can calculate after another estimated speed according to picture frame 3 and 4, upgrade picture frame group's estimated speed, and calculate acceleration according to calculating picture frame 3 and 4 estimated speed obtaining and the estimated speed that calculating picture frame 0 and 1 obtains, and the estimated speed and the acceleration that according to calculating picture frame 3 and 4, obtain judge whether to change trend.For instance, if judge optical mouse according to new estimated speed and acceleration, should adopt low-speed mode, picture frame group's picture frame number be become to the low-speed mode shown in Fig. 5 with image capture frequency setting.The estimated speed that please be careful between picture frame can directly be calculated to try to achieve, and also can indirect calculation try to achieve.Take Fig. 3 as example, wish is calculated the speed between picture frame 4 and picture frame 1, can directly with the displacement of picture frame 4 and picture frame 1, calculate, but also can calculate with the displacement between picture frame 4 and 0.
Also therefore, another aspect disclosed in this invention is not set picture frame group, only by estimated speed and acceleration, constantly upgrades the residing trend of optical mouse, and sets according to this not illumination frequencies, do not capture frequency, calculated rate and search area size.
Fig. 6 has illustrated the tracking action flow chart of optical navigator disclosed in this invention, and it has comprised the following step 601-623, and each step is to explain as an example of the embodiment of Fig. 3 example in the following description, but also can corresponding diagram 4 and the embodiment of Fig. 5.
Acquisition is with reference to picture frame (as picture frame 0).
Capture picture frame (as picture frame 1) now.
Calculate action (calculating estimated speed) relatively.
According to estimated speed, determine velocity mode.Determine to use fast mode, middle fast mode or low-speed mode.It is noted that, the present invention is not defined as and uses these three patterns, can only be divided into two patterns or more pattern yet, and this class changes all should be within scope disclosed in this invention.
Judge whether to want pick-up image.If arrive step 613, arrive step 611 if not.Step 609 is that the velocity mode determining according to step 607 determines whether capturing picture frame, for instance, can capture picture frame 3, but in Fig. 4, can not capture picture frame 3 in Fig. 3.
According to Trend Prediction speed now.The speed of estimating as picture frame group according to up-to-date estimated speed.In Fig. 3, if calculate after estimated speed according to picture frame 0 and 1, never capture picture frame and calculate new speed and do not change pattern, the estimated speed that can always calculate using picture frame 0 and 1 is as picture frame group's the speed of estimating, if but have the estimated speed (for example picture frame 3 and 4) that makes new advances of calculating, can new estimated speed be used as picture frame group's the speed of estimating.
Step 613
Acquisition picture frame.
Step 615
Judge whether to calculate estimated speed.The picture frame 3 of for example Fig. 3, its after being captured only can and follow-up picture frame 4 computing velocitys, but not can with picture frame 2 computing velocitys.Arrive if not step 611, if arrive step 617.
Calculate estimated speed, for example, in Fig. 3, with the picture frame 3 and 4 in picture frame group, calculate again estimated speed.
According to two estimated speeds, calculate acceleration.For example in Fig. 3 with the estimated speed of picture frame 0 and 1, and the estimated speed of picture frame 3 and 4, calculates acceleration.
According to the speed in step 617 and 619 and acceleration, judge trend.
If judge whether to change velocity mode according to trend, to step 607, reset pattern, arrive if not step 625.
Step 625
Judge whether it is last picture frame of picture frame group.For example, if (picture frame 16 of Fig. 3) captures picture frame (picture frame 17) now to step 603, get back to step 609 if not and continue the action of step 609-623.
Should be noted, in other embodiment, trend also can be determined by multiple speed and multiple acceleration, and do not limit, is using the second estimated speed and an acceleration.Take Fig. 3 as example, it can use the estimated speed of picture frame 0,1, the estimated speed of picture frame 1,3 (or estimated speed of picture frame 0,3), the estimated speed of picture frame 3,4 and the acceleration that these estimated speeds produce to carry out judgement trend.
According to aforesaid embodiment, can obtain corresponding optical navigation method, it can carry out the action of aforementioned optical navigator, and this optical navigation method can such as, be carried out by the program code being stored on a computer fetch medium (hard disk, CD, internal memory etc.).Because its detailed step is identical with the action of aforementioned optical navigator, here repeat no more.
According to aforesaid embodiment, the present invention not only can adjust not illumination frequencies according to the operating state of optical navigator, do not capture frequency and calculated rate is saved electric energy, more can adjust search area size and save calculated amount, more to reduce the consumption of energy.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (52)
1. an optical navigator, comprises:
Light source, in order to illumined surface with form image;
Image sensor, in order to capture the picture frame in this image; And
Controller, according to the first picture frame in the plurality of picture frame and position, the second picture frame after this first picture frame calculates the first estimated speed of this optical navigator, and according to wherein one at least of this first estimated speed control following parameters: whether this light source do not capture the search area that or not frequency, this controller and calculate the picture frame after calculated rate and this second picture frame of the picture frame being captured by this image sensor after this second picture frame of picture frame after this second picture frame to not illumination frequencies, this image sensor of the picture frame illumination after this second picture frame.
2. optical navigator as claimed in claim 1, next picture frame that wherein this second picture frame is this first picture frame.
3. optical navigator as claimed in claim 1, wherein this controller more judges that according to this first estimated speed this optical navigator is in that in multiple velocity modes, and according to wherein one at least of this speed-mode control following parameters of judging: this not illumination frequencies, this does not capture frequency, this calculated rate and this search area.
4. optical navigator as claimed in claim 3, wherein this controller more calculates the second estimated speed according to the plural picture frame being captured by this image sensor after this first picture frame, and according to this first estimated speed and this second estimated speed, calculate the acceleration of this optical navigator, and according to the plurality of estimated speed and the plurality of acceleration, obtain the trend of this optical navigator, and carry out wherein one at least of following parameters according to this trend: this not illumination frequencies, this does not capture frequency, this calculated rate and this search area.
5. optical navigator as claimed in claim 4, wherein this controller more judges according to this trend whether this optical navigator will switch to another in the plurality of velocity mode.
6. optical navigator as claimed in claim 3, wherein this controller is inversely proportional to this speed that illumination frequencies and this do not capture frequency and this optical navigator.
7. optical navigator as claimed in claim 3, wherein this controller is directly proportional the acceleration of this calculated rate and this optical navigator.
8. optical navigator as claimed in claim 3, wherein this controller is according to this illumination frequencies not, and this does not capture frequency adjusts the size of this search area.
9. optical navigator as claimed in claim 3, wherein this light source does not throw light on and controls this image sensor the 3rd picture frame after this second picture frame and do not capture the 3rd picture frame.
10. optical navigator as claimed in claim 9, wherein this controller more calculates the second estimated speed of this optical navigator according to the picture frame after this first picture frame and this second picture frame one of them and this second picture frame, and according to this first estimated speed and this two estimated speed, obtains the trend of this optical navigator.
11. optical navigators as claimed in claim 9, wherein this controller more calculates the second estimated speed of this optical navigator according to the 5th picture frame after the 4th picture frame and the 4th picture frame after the 3rd picture frame, and according to this first estimated speed and this two estimated speed, obtains the trend of this optical navigator.
12. optical navigators as claimed in claim 11, wherein the 4th picture frame and the 5th picture frame are discontinuous two picture frames.
13. 1 kinds of optical navigators, comprise:
Light source, in order to illumined surface with form image;
Image sensor, in order to capture the picture frame in this image; And
Controller, according to the first picture frame in the plurality of picture frame and position, the second picture frame after this first picture frame calculates the first estimated speed of this optical navigator, and define picture frame group according to this first estimated speed, this picture frame group has comprised multiple picture frames with this second picture frame, and according to wherein one at least of this first estimated speed control following parameters: this light source is the not illumination frequencies to the picture frame illumination in this picture frame group not, what this image sensor did not capture picture frame in this picture frame group does not capture frequency, this controller calculates the search area of the picture frame in calculated rate and this picture frame group of the picture frame being captured by this image sensor in this picture frame group.
14. optical navigators as claimed in claim 13, next picture frame that wherein this second picture frame is this first picture frame.
15. optical navigators as claimed in claim 13, the picture frame that wherein this picture frame group comprises keeps count of and is proportional to this first estimated speed.
16. optical navigators as claimed in claim 13, this controller more judges that according to this first estimated speed this optical navigator is in that in multiple velocity modes, and according to wherein one at least of this speed-mode control following parameters of judging: the picture frame number in this picture frame group, this not illumination frequencies, this does not capture frequency, this calculated rate and this search area.
17. optical navigators as claimed in claim 16, this controller more calculates the second estimated speed according to the multiple picture frames that captured by this image sensor in this picture frame group, and according to this first estimated speed and this second estimated speed, calculate the acceleration of this optical navigator, and according to the plurality of estimated speed and the plurality of acceleration, obtain the trend of this optical navigator, and carry out wherein one at least of following parameters according to this trend: the picture frame number in this picture frame group, this not illumination frequencies, this does not capture frequency, this calculated rate and this search area.
18. optical navigators as claimed in claim 16, wherein this controller more judges according to this trend whether this optical navigator will switch to another in the plurality of velocity mode.
19. optical navigators as claimed in claim 16, wherein this controller is inversely proportional to this speed that illumination frequencies and this do not capture frequency and this optical navigator.
20. optical navigators as claimed in claim 16, wherein this controller is directly proportional the acceleration of this calculated rate and this optical navigator.
21. optical navigators as claimed in claim 16, wherein this controller is according to this illumination frequencies not, and this does not capture frequency adjusts the size of this search area.
22. optical navigators as claimed in claim 16, wherein this controller makes this light source not to the 3rd picture frame illumination after this second picture frame and controls this image sensor not capture the 3rd picture frame.
23. optical navigators as claimed in claim 22, wherein this controller more calculates the second estimated speed of this optical navigator according to the picture frame after this first picture frame and this second picture frame one of them and this second picture frame, and according to this first estimated speed and the plurality of the second estimated speed, obtains the trend of this optical navigator.
24. optical navigators as claimed in claim 22, wherein this controller more calculates the second estimated speed of this optical navigator according to the 5th picture frame after the 4th picture frame and the 4th picture frame after the 3rd picture frame, and according to this first estimated speed and this two estimated speed, obtains the trend of this optical navigator.
25. optical navigators as claimed in claim 24, wherein the 4th picture frame and the 5th picture frame are discontinuous two picture frames.
26. optical navigators as claimed in claim 24, wherein the 4th picture frame is last picture frame of this picture frame group, and the 5th picture frame is first picture frame of next picture frame group.
27. 1 kinds of optical navigation methods, comprise the following step:
Control the surface of light illumination to form image;
Control image sensor and capture the picture frame in this image;
According to the first picture frame in the plurality of picture frame and position, the second picture frame after this first picture frame calculates the first estimated speed of the optical navigator that comprises this light source and this image sensor, and according to wherein one at least of this first estimated speed control following parameters: this light source is the not illumination frequencies to the picture frame illumination after this second picture frame not, what this image sensor did not capture picture frame after this second picture frame does not capture frequency, calculate the search area of the picture frame after calculated rate and this second picture frame of the picture frame being captured by this image sensor after this second picture frame.
28. optical navigation methods as claimed in claim 27, next picture frame that wherein this second picture frame is this first picture frame.
29. optical navigation methods as claimed in claim 27, further comprise: according to this first estimated speed, judge that this optical navigator is in that in multiple velocity modes, and according to wherein one at least of this speed-mode control following parameters of judging: this not illumination frequencies, this does not capture frequency, this calculated rate and this search area.
30. optical navigation methods as claimed in claim 29, further comprise: according to the multiple picture frames that captured by this image sensor after this first picture frame, calculate the second estimated speed, and according to this first estimated speed and this second estimated speed, calculate the acceleration of this optical navigator, and according to the plurality of estimated speed and the plurality of acceleration, obtain the trend of this optical navigator, and carry out wherein one at least of following parameters according to this trend: this not illumination frequencies, this does not capture frequency, this calculated rate and this search area.
31. optical navigation methods as claimed in claim 30, further comprise: according to this trend, judge whether this optical navigator will switch to another in the plurality of velocity mode.
32. optical navigation methods as claimed in claim 29, wherein this speed that illumination frequencies and this do not capture frequency and this optical navigator is inversely proportional to.
33. optical navigation methods as claimed in claim 29, further comprise the acceleration of this calculated rate and this optical navigator are directly proportional.
34. optical navigation methods as claimed in claim 29, further comprise that illumination frequencies and this do not capture frequency and adjust the size of this search area according to this.
35. optical navigation methods as claimed in claim 29, further comprise: make this light source not to the 3rd picture frame illumination after this second picture frame and control this image sensor not capture the 3rd picture frame.
36. optical navigation methods as claimed in claim 35, further comprise: make picture frame after this first picture frame and this second picture frame one of them and this second picture frame calculate the second estimated speed of this optical navigator, and according to this first estimated speed and the plurality of the second estimated speed, obtain the trend of this optical navigator.
37. optical navigation methods as claimed in claim 35, further comprise: according to the 5th picture frame after the 4th picture frame and the 4th picture frame after the 3rd picture frame, calculate the second estimated speed of this optical navigator, and according to this first estimated speed and this two estimated speed, obtain the trend of this optical navigator.
38. optical navigation methods as claimed in claim 37, wherein the 4th picture frame and the 5th picture frame are discontinuous two picture frames.
39. 1 kinds of optical navigation methods, comprise the following step:
Control light illumination surface to form image;
Control image sensor and capture the picture frame in this image; And
According to the first picture frame in the plurality of picture frame and position, the second picture frame after this first picture frame calculates the first estimated speed of this optical navigator, and define picture frame group according to this first estimated speed, this picture frame group has comprised multiple picture frames with this second picture frame, and according to wherein one at least of this first estimated speed control following parameters: this light source is the not illumination frequencies to the picture frame illumination in this picture frame group not, what this image sensor did not capture picture frame in this picture frame group does not capture frequency, calculate the search area of the picture frame in calculated rate and this picture frame group of the picture frame being captured by this image sensor in this picture frame group.
40. optical navigation methods as claimed in claim 39, next picture frame that wherein this second picture frame is this first picture frame.
41. optical navigation methods as claimed in claim 39, the picture frame that wherein this picture frame group comprises keeps count of and is proportional to this first estimated speed.
42. optical navigation methods as claimed in claim 39, further comprise: according to this first estimated speed, judge that this optical navigator is in that in multiple velocity modes, and according to wherein one at least of this speed-mode control following parameters of judging: the picture frame number in this picture frame group, this not illumination frequencies, this does not capture frequency, this calculated rate and this search area.
43. optical navigation methods as claimed in claim 42, further comprise: according to the plural picture frame being captured by this image sensor in this picture frame group, calculate the second estimated speed, and according to this first estimated speed and this second estimated speed, calculate the acceleration of this optical navigator, and according to the plurality of estimated speed and the plurality of acceleration, obtain the trend of this optical navigator, and carry out wherein one at least of following parameters according to this trend: the picture frame number in this picture frame group, this not illumination frequencies, this does not capture frequency, this calculated rate and this search area.
44. optical navigation methods as claimed in claim 42, further comprise: according to this trend, judge whether this optical navigator will switch to another in the plurality of velocity mode.
45. optical navigation methods as claimed in claim 42, further comprise: this speed that illumination frequencies and this do not capture frequency and this optical navigator is inversely proportional to.
46. optical navigation methods as claimed in claim 42, further comprise: the acceleration of this calculated rate and this optical navigator is directly proportional.
47. optical navigation methods as claimed in claim 42, further comprise: according to this light source, according to this illumination frequencies not, this does not capture frequency adjusts the size of this search area.
48. optical navigation methods as claimed in claim 42, further comprise: make this light source not to the 3rd picture frame illumination after this second picture frame and control this image sensor not capture the 3rd picture frame.
49. optical navigation methods as claimed in claim 48, further comprise: make picture frame after this first picture frame and this second picture frame one of them and this second picture frame calculate the second estimated speed of this optical navigator, and according to this first estimated speed and the plurality of the second estimated speed, obtain the trend of this optical navigator.
50. optical navigation methods as claimed in claim 48, further comprise: according to the 5th picture frame after the 4th picture frame and the 4th picture frame after the 3rd picture frame, calculate the second estimated speed of this optical navigator, and according to this first estimated speed and this two estimated speed, obtain the trend of this optical navigator.
51. optical navigation methods as claimed in claim 50, wherein the 4th picture frame and the 5th picture frame are discontinuous two picture frames.
52. optical navigation methods as claimed in claim 50, wherein the 4th picture frame is last picture frame of this picture frame group, and the 5th picture frame is first picture frame of next picture frame group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210392830.4A CN103729071B (en) | 2012-10-16 | 2012-10-16 | Optical navigator and optical navigation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112925424A (en) * | 2019-12-05 | 2021-06-08 | 原相科技股份有限公司 | Optical navigation device and optical navigation method |
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