CN104184952B - Optical detection apparatus and its synchronization adjustment method - Google Patents
Optical detection apparatus and its synchronization adjustment method Download PDFInfo
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- CN104184952B CN104184952B CN201310198599.XA CN201310198599A CN104184952B CN 104184952 B CN104184952 B CN 104184952B CN 201310198599 A CN201310198599 A CN 201310198599A CN 104184952 B CN104184952 B CN 104184952B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 89
- 238000001514 detection method Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000003384 imaging method Methods 0.000 claims abstract description 77
- 230000001360 synchronised effect Effects 0.000 claims description 27
- 230000008859 change Effects 0.000 claims description 10
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/73—Circuitry for compensating brightness variation in the scene by influencing the exposure time
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/76—Circuitry for compensating brightness variation in the scene by influencing the image signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/50—Control of the SSIS exposure
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Abstract
The invention discloses a kind of synchronization adjustment method of optical detection apparatus, for the frequency of exposure of imaging sensor to be simultaneously indicated to the flicker frequency of light source.Methods described includes obtaining consecutive image group, analyzes the brightness value of each image of the consecutive image group, and adjusts the frequency of exposure according to the brightness ratio of two images and the dutycycle of described image sensor.Wherein, the flicker frequency of the frequency of exposure of described image sensor higher than the instruction light source.The optical detection apparatus of the present invention can carry out Frequency Synchronization adjustment automatically, so that optical detection apparatus correctly judges, the stylus with active lighting function whether there is on the screen of optical touch control system, and further quickly calculate position and the motion track of stylus.
Description
Technical field
The present invention relates to a kind of optical detection apparatus, more particularly to a kind of luminous frequency of traceable active reference light source
The optical detection apparatus and its synchronization adjustment method of rate.
Background technology
In order to resist background light source noise, traditional optical detection apparatus would generally use the reference for having specific flicker frequency
Light source, optical detection apparatus is facilitated to filter out noise.Because the flicker sequential of reference light source can be because of the not enough power supply of its built-in power supply
And change, in order to allow imaging sensor correctly to obtain the reference light source of the specific flicker frequency, according to imaging sensor
Exposure time series it is whether synchronous with the flicker sequential of reference light source, can be divided into synchronous flashing and it is asynchronous flicker two kinds of method for detecting.
Traditional synchronous flashing technology first sends signal by optical detection apparatus, after the signal is received by the sending and receiving end of reference light source,
Basis signal receives the flicker sequential of time adjustment reference light source again, makes the exposure time series of its synchronous images sensor.But this
Method need to have the shortcomings that costly in reference light source setting signal transceiver.
The content of the invention
The present invention provides a kind of optical detection apparatus of glow frequency of traceable active reference light source and its same step
Adjusting method, it is above-mentioned to solve the problems, such as.
The present invention discloses a kind of synchronization adjustment method of optical detection apparatus, for the frequency of exposure of imaging sensor is same
Walk in the flicker frequency of instruction light source.Methods described includes obtaining consecutive image group, analyzes each image of the consecutive image group
Brightness value, and the frequency of exposure is adjusted according to the brightness ratio of two images and the dutycycle of described image sensor.
Wherein, the flicker frequency of the frequency of exposure of described image sensor higher than the instruction light source.
Include judging the consecutive image group invention additionally discloses the brightness value for each image for analyzing the consecutive image group
All light image and adjacent non-all light image brightness ratio.
Include judging the consecutive image group invention additionally discloses the brightness value for each image for analyzing the consecutive image group
Half bright image with respect to all light image brightness ratio.
Invention additionally discloses adjusting the frequency of exposure to include changing the startup time of described image sensor, so that described
Frequency of exposure is synchronized with the flicker frequency.
It is described to further comprise that the consecutive image group has parts of images not get invention additionally discloses methods described
When indicating light source, the frequency of exposure of described image sensor is downgraded according to the default stage.
Invention additionally discloses methods described to further comprise one of them half bright image phase according to the consecutive image group
It is poor to the chronomere of another half bright image, the dutycycle or flicker cycle of the instruction light source are obtained, and according to described
Flicker cycle correspondingly adjusts the frequency of exposure of described image sensor.
Further comprise the regional area of array of pixels for setting described image sensor invention additionally discloses methods described,
And add up the brightness value of the regional area all pixels.
Total luminance value or average brightness value invention additionally discloses the brightness value for the partial pixel of each image.
Further comprise the brightness value and threshold value of the partial pixel of each image of comparison invention additionally discloses methods described, with
And judge whether described image sensor reads the instruction light source according to comparative result.
Further comprise, when described image sensor reads the instruction light source, carrying invention additionally discloses methods described
The frequency of exposure of high described image sensor, the synchronous adjustment of the frequency of exposure and the flicker frequency is carried out, and
The frequency of exposure is synchronized with the frequency of exposure of reduction described image sensor after the flicker frequency.
Further comprise calculating invention additionally discloses methods described and do not read the instruction light in the consecutive image group
The image number in source, and described image sensor enters park mode when described image number is more than default value.
Invention additionally discloses the dutycycle that the dutycycle of described image sensor is less than the instruction light source.
Invention additionally discloses a kind of synchronization adjustment method of optical detection apparatus, for by the frequency of exposure of imaging sensor
It is synchronized with the flicker frequency of instruction light source.Methods described includes, according to the mobile frequency of exposure of preset phase difference, obtaining multiple
Consecutive image group, the brightness value of each image of each consecutive image group is analyzed, and adjustment institute is changed according to the brightness of adjacent image
State imaging sensor.
Further comprise finding out with the described continuous of the adjacent all light image of complete dark image invention additionally discloses methods described
Image sets, and obtain the frequency of exposure of the consecutive image group and be synchronized with the information of the flicker frequency.
Invention additionally discloses a kind of optical detection apparatus, for detecting instruction light source.The optical detection apparatus includes figure
As sensor and control unit.Described image sensor is used for obtaining consecutive image group.Described in described control unit electrical connection
Imaging sensor.Described control unit analyzes the brightness value of each image of the consecutive image group, and according to the bright of two images
The dutycycle of degree ratio and described image sensor adjusts the frequency of exposure of described image sensor.
The present invention can according to the consecutive image of acquisition brightness value recognisable image sensor with instruction light source phase difference, with
Frequency Synchronization adjustment is carried out automatically for optical detection apparatus so that optical detection apparatus can correctly judge with active luminous
The stylus of function whether there is on the screen of optical touch control system, and further quickly calculate position and the movement of stylus
Track.
Brief description of the drawings
Fig. 1 is the schematic diagram of the optical touch control system of the embodiment of the present invention.
Fig. 2 is the flow chart of the Frequency Synchronization method of adjustment of the embodiment of the present invention.
Fig. 3 A, Fig. 3 B are respectively instruction light source figure compared with the frequency of imaging sensor of the embodiment of the present invention.
Fig. 4 is the flow chart of the frequency method for detecting of the embodiment of the present invention.
Fig. 5 is the operational flowchart of the optical detection apparatus of the embodiment of the present invention.
Fig. 6 is the flow chart of the Frequency Synchronization method of adjustment of another embodiment of the present invention.
Fig. 7 A, Fig. 7 B, Fig. 7 C are respectively instruction light source figure compared with the frequency of imaging sensor shown in Fig. 6.
Wherein, description of reference numerals is as follows：
10 optical touch control systems
12 optical detection apparatus
14 instruction light sources
16 imaging sensors
18 control units
Step 200,202,204
Step 400,402,404
Step 500,502,504,506,507,508,510,512,514
Step 600,602,604,606
Embodiment
Referring to Fig. 1, Fig. 1 is the schematic diagram of the optical touch control system 10 of the embodiment of the present invention.Optical touch control system 10 wraps
Optical detection apparatus 12 and instruction light source 14 are included, optical detection apparatus 12 is used for detecting and following the trail of the optical signal of instruction light source 14
Light intensity and motion track, the control instruction assigned with judging user by indicating light source 14.Wherein, instruction light source 14 is
Stylus with active lighting function.Optical detection apparatus 12 includes imaging sensor 16 and control unit 18.Image
Sensor 16 is arranged on the corner screen of optical touch control system 10, and towards screen surface to obtain consecutive image group.Screen can
Reflecting strips, or the further material of the absorbable luminous energy of coating are not provided with, to provide a uniform dark background.When instruction light source
14 on screen when moving, and imaging sensor 16 can detect the change of corresponding optical signal.
Control unit 18 electrically connects imaging sensor 16.Because the dutycycle and frequency of exposure of imaging sensor 16 are all
Know, but indicate that the flicker frequency of light source 14 can reduce because the electric power of stylus built-in battery is decayed, therefore the optics of the present invention
Arrangement for detecting 12 can analyze the brightness value of each image of consecutive image group in real time by control unit 18, and according to two images
The dutycycle of brightness ratio and imaging sensor 16 adjust the frequency of exposure of imaging sensor 16, by imaging sensor 16
Frequency of exposure be adjusted to be synchronized with the flicker frequency of instruction light source 14, it is ensured that optical detection apparatus 12 can precisely judge to indicate light
The motion track in source 14.
In general, an optical detection apparatus 12 may include one or more imaging sensor 16 and one
Control unit 18, and optical touch control system 10 can have one or more optical detection apparatus 12, set up separately in each corner of screen
Or each border.When optical touch control system 10 has multiple optical detection apparatus 12, it can be shared between multiple optical detection apparatus 12
One control unit 18, and outside the control unit 18 shared can be independently of all optical detection apparatus 12, or it is arranged on it
In inside an optical detection apparatus 12.In use, optical detection apparatus 12 starts all imaging sensors 16 to detect
Instruction light source 14 is surveyed, imaging sensor 16 carries out the location Calculation of stylus according to image is obtained.When imaging sensor 16 is read
Less than light source 14 is indicated, then optical detection apparatus 12 enters park mode.In order to save energy resource consumption, the control list of park mode
Member 18 only starts the one of detecting of imaging sensor 16 instruction light source 14, and now imaging sensor 16 judges whether have in image
Stylus exists and enters the synchronous adjustment of line frequency without location Calculation, and according to the change in optical signal of instruction light source 14.
Furthermore, it is understood that optical touch control system 10 have more than one imaging sensor 16 can have first operator scheme and
Second operator scheme, and the frequency of exposure of first operator scheme is more than the frequency of exposure of second operator scheme.Typically use shape
During state, control unit 18 controls multiple images sensor 16 to operate in second operator scheme, the optical signal of detecting instruction light source 14
Change and carry out location Calculation.When optical detection apparatus 12 enters park mode, control unit 18 closes most of image sensings
Device 16, only retain one of imaging sensor 16, to save the energy resource consumption in park mode, and by this imaging sensor 16
First operator scheme is switched to carry out Frequency Synchronization adjustment.Because the frequency of exposure of first operator scheme is far above instruction light source 14
Flicker frequency so that optical detection apparatus 12 can be rapidly completed Frequency Synchronization, with meet consumer be intended to real-time control use
Custom.
Fig. 2 and Fig. 3 are referred to, Fig. 2 is the flow chart of the Frequency Synchronization method of adjustment of the embodiment of the present invention, and Fig. 3 is this hair
Instruction light source 14 figure compared with the frequency of imaging sensor 16 of bright embodiment.Method described in Fig. 2 is useful in the light shown in Fig. 1
Learn arrangement for detecting 12.Because indicate that the flicker frequency of light source 14 can be with the electric power decay of stylus built-in battery and according to the default stage
Progressively downgrade, therefore whether the frequency of exposure that optical detection apparatus 12 need to detect imaging sensor 16 is synchronized with the sudden strain of a muscle for indicating light source 14
Bright frequency, can be adjusted if being not up to synchronously according to following step.First, step 200 is performed, imaging sensor 16, which obtains, to be connected
Continuous image sets.Then step 202 is performed, control unit 18 judges all light image of consecutive image group and adjacent non-all light image
Brightness ratio.Finally, step 204 is performed, control unit 18 changes imaging sensor 16 according to the brightness ratio of two images
The startup time so that the frequency of exposure of imaging sensor 16 be synchronized with instruction light source 14 flicker frequency.
As shown in figure 3, flicker frequency of the frequency of exposure of imaging sensor 16 higher than instruction light source 14, and image sensing
The dutycycle of device 16 is less than the dutycycle of instruction light source 14.In figure 3 a, consecutive image group includes all light image and complete dark image,
Therefore control unit 18 can obtain the information that frequency of exposure is synchronized with flicker frequency.In the dutycycle (such as 6T) of instruction light source 14
It is interior to produce three all light images.In figure 3b, without synchronously, consecutive image group includes all light figure for frequency of exposure and flicker frequency
Picture, half bright image and complete dark image.Then control unit 18 can choose any one half bright image, and it is relatively complete to obtain half bright image
The brightness ratio of bright image.For example, if half bright image with respect to all light image brightness ratio be 60%, brightness ratio is multiplied
The phase difference of value, as frequency of exposure and flicker frequency obtained by the dutycycle (such as 1T) of image taking sensor 16, therefore control
Unit 18 can change the startup time of imaging sensor 16 according to the phase difference for calculating gained so that frequency of exposure is synchronized with flicker
Frequency.
Further aspect, optical detection apparatus 12 of the invention further can be applicable to the instruction light source of unknown flicker frequency
14.Fig. 3 and Fig. 4 are referred to, Fig. 4 is the flow chart of the frequency method for detecting of the embodiment of the present invention.Method described in Fig. 4 is useful in
Optical detection apparatus 12 shown in Fig. 1.First, step 400 is performed, imaging sensor 16 obtains consecutive image group.Then perform
Step 402, control unit 18 analyzes time list of one of them half bright image with respect to another half bright image of consecutive image group
Potential difference, to obtain indicating the dutycycle or flicker cycle (inverse ratio of flicker frequency) of light source 14.Such as it was found from Fig. 3 B, half bright figure
As the dutycycle that the bright image B of A and half chronomere's difference is instruction light source 14, the half bright bright image C of image A and half chronomere
Difference is also the flicker cycle of instruction light source 14.Finally, step 404 is performed, control unit 18 can be according to the flicker of detecting gained
The frequency of exposure of the corresponding adjustment imaging sensor 16 of frequency (calculated and learnt by flicker cycle), preferably makes frequency of exposure for flicker
The integral multiple of frequency, it is convenient for Frequency Synchronization adjustment as shown in Figure 2.
Illustrated in this for other functions of the optical detection apparatus 12 of the present invention.Optical detection apparatus 12 is being carried out
When Frequency Synchronization adjusts, control unit 18 only determine whether stylus (instruction light source 14) exist and without positioning, thereby
Improve operation efficiency.First, in park mode, the partial pixel of 18 more each image of control unit (such as predetermined number is
One to three pixel) brightness value summation whether exceed default threshold value.If it is not, stylus is not present, optical detection apparatus 12
Maintain park mode；If so, representing that stylus is arranged in the sensing range of imaging sensor 16, control unit 18 is by image
Sensor 16 is switched to first operator scheme, optical detection apparatus 12 is jumped out park mode and goes forward side by side the synchronous adjustment of line frequency.
In the first mode of operation, control unit 18 can set imaging sensor 16 and enter traveling optical signal using the regional area of array of pixels
Detecting.For example, control unit 18 can according to imaging sensor 16 towards screen when, closest to two pixels of screen surface
Row are set to regional area.Then, control unit 18 adds up brightness value (such as the total luminance value or average of regional area all pixels
Brightness value), imply that every image only has a brightness value, the brightness ratio between each image in consecutive image group can be obtained, with
Adjust and use for Frequency Synchronization.So, optical detection apparatus 12 can reduce energy resource consumption and improve the computing of image procossing
Speed.
Referring to Fig. 5, Fig. 5 is the operational flowchart of the optical detection apparatus 12 of the embodiment of the present invention.Operation described in Fig. 5
Mode is useful in the optical detection apparatus 12 shown in Fig. 1.Step 500 is first carried out, optical detection apparatus 12 is initialized to start
Imaging sensor 16.Then, step 502 is performed, control unit 18 judges whether imaging sensor 16 reads instruction light source 14.
If so, performing step 504, control unit 18 improves the frequency of exposure of imaging sensor 16, implies that switching imaging sensor 16 is
First operator scheme, scanned by high frequency and adjusted come acceleration synchronization.Then step 506 and step 507 are performed, carry out such as Fig. 2 or
Frequency Synchronization adjustment described in Fig. 3, control unit 18 need to check the optical signal phase of instruction light source 14, and further confirm that figure
As the frequency of exposure of sensor 16 has completed the synchronous adjustment of the flicker frequency of relative instruction light source 14.Finally, step is performed
508, for imaging sensor 16 with after the Frequency Synchronization of instruction light source 14, control unit 18 reduces the exposure frequency of imaging sensor 16
Rate, imply that and imaging sensor 16 is switched back into second operator scheme.Then optical detection apparatus 12 can also perform stylus and (refer to
Show light source 14) positioning detecting；If not detecting the optical signal of instruction light source 14, optical detection apparatus 12 then drives image to pass
Sensor 16 searches instruction light source 14, implies that and performs step 502, to judge whether imaging sensor 16 reads instruction light source 14.
If control unit 18 judges that imaging sensor 16 does not read instruction light source 14, step 510, control unit are performed
The image number of instruction light source 14 is not got in 18 calculating consecutive image groups.If the image number for not reading optical signal is more than silent
Recognize value, such as multiple continuous images all do not read instruction light source 14, perform step 512, control unit 18 judges that stylus (refers to
Show light source 14) it is not present, and drive imaging sensor 16 to enter park mode.When imaging sensor 16 is waken up from park mode
Afterwards, optical detection apparatus 12 can perform step 502, starts the positioning to stylus (instruction light source 14) in real time and detects.If do not read
The image number of optical signal is taken to be less than default value, consecutive image group only has parts of images can not get instruction light source 14, now
Control unit 18 can determine whether that the flicker frequency of light source 14 is not simultaneously indicated in the frequency of exposure of imaging sensor 16.Therefore perform step
514, control unit 18 downgrades the frequency of exposure of imaging sensor 16 according to the default stage, and carries out image again according to preceding method
The Frequency Synchronization adjustment of sensor 16 and instruction light source 14.
Referring to Fig. 6, Fig. 6 is the flow chart of the Frequency Synchronization method of adjustment of another embodiment of the present invention.Side described in Fig. 6
Method is useful in the optical detection apparatus 12 shown in Fig. 1.First, step 600 is performed, control unit 18 is mobile according to preset phase difference
The frequency of exposure of imaging sensor 16, then performs step 602, and imaging sensor 16 all obtains multiple continuous after each phase shift
Image sets, step 604 is then performed, control unit 18 analyzes the brightness value of each image of each consecutive image group, with from multiple companies
In continuous image sets, select with the adjacent one of consecutive image group of complete dark image and all light image.So, control is single
Member 18 can pick out the frequency of exposure for being selected consecutive image group and be synchronized with the flicker frequency of instruction light source 14, therefore finally hold
Row step 606, control unit 18 can change the frequency of exposure of adjustment imaging sensor 16 according to the brightness of adjacent image, with synchronization
Indicate the flicker frequency of light source 14.In this embodiment, the frequency of exposure of imaging sensor 16, which is preferably higher than, indicates light source 14
Flicker frequency so that imaging sensor 16 can be scanned by high frequency to be rapidly completed Frequency Synchronization.
Referring to Fig. 7, Fig. 7 is instruction light source 14 figure compared with the frequency of imaging sensor 16 shown in Fig. 6.Come in detail
Say, control unit 18 can be poor according to preset phase, such as 1/3rd chronomeres, when changing the startup of imaging sensor 16
Between, to draw three kinds of waveform comparison figures as shown in Figure 7.In Fig. 7 A and Fig. 7 B, because the frequency of exposure of imaging sensor 16
Be not simultaneously indicated the flicker frequency of light source 14, thus the consecutive image group acquired in imaging sensor 16 include all light image,
Half bright image and complete dark image, and half bright image is interspersed between all light image and complete dark image.And in fig. 7 c, because of image
The flicker frequency of the frequency of exposure synchronizing indication light source 14 of sensor 16, the consecutive image group acquired in imaging sensor 16 are only wrapped
Include all light image and complete dark image.Control unit 18 can determine whether the consecutive image for only including two adjacent all light images and complete dark image
The corresponding frequency of exposure synchronous flashing frequency of group, therefore control unit 18 can drive image to pass according to aforementioned parameters (preset phase is poor)
Sensor carries out image acquisition with synchronizing frequency.The dutycycle of imaging sensor 16 is preferably less than the dutycycle for indicating light source 14,
So that imaging sensor 16 can indicate light source 14 light when quick obtaining multiple images.
From the foregoing, it will be observed that the optical detection apparatus of the present invention can be in the condition of the duty when frequency of exposure of unknown instruction light source
The parameter of lower Auto-Sensing instruction light source, or quickly carry out image sensing in the dutycycle and frequency of exposure of known instruction light source
The synchronous adjustment of the frequency of exposure of device and the frequency of exposure of instruction light source.Imaging sensor can shoot multiple consecutive image groups for control
Unit processed carries out brightness ratio compared with the dutycycle and exposure cycle of the interval time judgement instruction light source of multiple half bright images.
The dutycycle and frequency of exposure for indicating light source are all known situation, and optical detection apparatus has been using a consecutive image group
Into the adjustment of Frequency Synchronization.Imaging sensor shoots a consecutive image group, and control unit analyzes half bright figure in consecutive image group
The brightness ratio of picture and all light image, to judge the phase of the frequency of exposure of the frequency of exposure of imaging sensor and instruction light source
Difference.So control unit can make imaging sensor and instruction light to change the startup time of imaging sensor in real time
The Frequency Synchronization in source.
Prior art is compared, the present invention can be according to the brightness value recognisable image sensor and instruction light of the consecutive image of acquisition
The phase difference in source, so that optical detection apparatus carries out Frequency Synchronization adjustment automatically so that optical detection apparatus can correctly judge
Stylus with active lighting function whether there is on the screen of optical touch control system, and further quickly calculate touch-control
The position of pen and motion track.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (27)
- A kind of 1. synchronization adjustment method of optical detection apparatus, for the frequency of exposure of imaging sensor is simultaneously indicated into light source Flicker frequency, it is characterised in that methods described includes：Obtain consecutive image group；Analyze the brightness value of each image of the consecutive image group；AndThe frequency of exposure is adjusted according to the dutycycle of the brightness ratio of two images and described image sensor；Wherein, the flicker frequency of the frequency of exposure of described image sensor higher than the instruction light source；Methods described further comprises：When the consecutive image group has parts of images can not get the instruction light source, downgrade described image according to the default stage and pass The frequency of exposure of sensor.
- 2. the method as described in claim 1, it is characterised in that the brightness value for analyzing each image of the consecutive image group also wraps Include：Judge all light image of the consecutive image group and the brightness ratio of adjacent non-all light image；Wherein, when the frequency of exposure of described image sensor is without the synchronously flicker frequency of the instruction light source, in the exposure In the waveform of light frequency high level and high level in the waveform of the flicker frequency completely to it is corresponding when described image sensor shoot The image arrived is all light image；High level is not in the waveform of high level and the flicker frequency in the waveform of the frequency of exposure The image that described image sensor photographs when completely to corresponding to is non-all light image.
- 3. the method as described in claim 1, it is characterised in that the brightness value for analyzing each image of the consecutive image group also wraps Include：Judge brightness ratio of the half bright image with respect to all light image of the consecutive image group；Wherein, when the frequency of exposure of described image sensor is without the synchronously flicker frequency of the instruction light source, in the exposure In the waveform of light frequency high level and high level in the waveform of the flicker frequency completely to it is corresponding when described image sensor shoot The image arrived is all light image；High level and high level portion in the waveform of the flicker frequency in the waveform of the frequency of exposure It is half bright image to divide the image that described image sensor photographs during to corresponding to.
- 4. the method as described in claim 1, it is characterised in that adjusting the frequency of exposure also includes：Change the startup time of described image sensor, so that the synchronous flicker frequency of the frequency of exposure.
- 5. the method as described in claim 1, it is characterised in that methods described further comprises：It is poor with respect to the chronomere of another half bright image according to one of them half bright image of the consecutive image group, obtain institute State the dutycycle or flicker cycle of instruction light source；AndThe frequency of exposure of described image sensor is correspondingly adjusted according to the flicker cycle；Wherein, when the frequency of exposure of described image sensor is without the synchronously flicker frequency of the instruction light source, in the exposure In the waveform of light frequency high level and high level part in the waveform of the flicker frequency to it is corresponding when described image sensor shoot The image arrived is half bright image.
- 6. the method as described in claim 1, it is characterised in that methods described further comprises：Set the regional area of the array of pixels of described image sensor；AndAdd up the brightness value of the regional area all pixels.
- 7. the method as described in claim 1 or 6, it is characterised in that the brightness value is total bright for the partial pixel of each image Angle value or average brightness value.
- 8. the method as described in claim 1, it is characterised in that methods described further comprises：Compare the brightness value and threshold value of the partial pixel of each image；AndAccording to comparative result, judge whether described image sensor reads the instruction light source.
- 9. method as claimed in claim 8, it is characterised in that methods described further comprises：When described image sensor reads the instruction light source, the frequency of exposure of described image sensor is improved；Carry out the synchronous adjustment of the frequency of exposure and the flicker frequency；AndThe frequency of exposure synchronously after the flicker frequency, reduces the frequency of exposure of described image sensor.
- 10. method as claimed in claim 8, it is characterised in that methods described further comprises：Calculate the image number for not reading the instruction light source in the consecutive image group；AndWhen described image number is more than default value, described image sensor enters park mode.
- 11. the method as described in claim 1, it is characterised in that the dutycycle of described image sensor is less than the instruction light The dutycycle in source.
- A kind of 12. synchronization adjustment method of optical detection apparatus, for the frequency of exposure of imaging sensor is simultaneously indicated into light source Flicker frequency, it is characterised in that methods described includes：The frequency of exposure is adjusted according to preset phase difference；Obtain multiple consecutive image groups；Analyze the brightness value of each image of each consecutive image group；AndAdjustment described image sensor is changed according to the brightness of adjacent image.
- 13. method as claimed in claim 12, it is characterised in that methods described further comprises：Find out the consecutive image group with the adjacent all light image of complete dark image；AndObtain the information of the synchronous flicker frequency of the frequency of exposure of the consecutive image group；Wherein, when the frequency of exposure of described image sensor is without the synchronously flicker frequency of the instruction light source, in the exposure In the waveform of light frequency high level and high level in the waveform of the flicker frequency completely to it is corresponding when described image sensor shoot The image arrived is all light image；High level and low level pair in the waveform of the flicker frequency in the waveform of the frequency of exposure At once, the image that described image sensor photographs is complete dark image.
- 14. method as claimed in claim 12, it is characterised in that the dutycycle of described image sensor is less than or equal to described Indicate the dutycycle of light source.
- A kind of 15. optical detection apparatus, for detecting instruction light source, it is characterised in that the optical detection apparatus includes：Imaging sensor, for obtaining consecutive image group；AndControl unit, electrically connects described image sensor, and described control unit analyzes the bright of each image of the consecutive image group Angle value, and the exposure of described image sensor is adjusted according to the brightness ratio of two images and the dutycycle of described image sensor Light frequency；Wherein, flicker frequency of the frequency of exposure of described image sensor higher than the instruction light source；Described control unit further described image sensor have parts of images can not get it is described instruction light source when, according to pre- If the stage downgrades the frequency of exposure of described image sensor.
- 16. optical detection apparatus as claimed in claim 15, it is characterised in that described control unit judges the consecutive image The all light image and adjacent non-all light image of group, or half bright image is with respect to the brightness ratio of all light image；Wherein, when described It is high in the waveform of the frequency of exposure when frequency of exposure of imaging sensor is without the synchronously flicker frequency of the instruction light source Level and high level in the waveform of the flicker frequency completely to it is corresponding when the image that photographs of described image sensor be all light figure Picture；In the waveform of the frequency of exposure high level and high level in the waveform of the flicker frequency not completely to it is corresponding when described in The image that imaging sensor photographs is non-all light image；High level and the flicker frequency in the waveform of the frequency of exposure Waveform in high level part to it is corresponding when the image that photographs of described image sensor be half bright image.
- 17. optical detection apparatus as claimed in claim 15, it is characterised in that described control unit changes described image sensing The startup time of device, so that the synchronous flicker frequency of the frequency of exposure.
- 18. optical detection apparatus as claimed in claim 15, it is characterised in that described control unit is further according to the company One of them half bright image of continuous image sets is poor with respect to the chronomere of another half bright image, obtains accounting for for the instruction light source Sky ratio or flicker cycle, accordingly to adjust the frequency of exposure of described image sensor；Wherein, when described image sensor When frequency of exposure is without the synchronously flicker frequency of the instruction light source, high level and the sudden strain of a muscle in the waveform of the frequency of exposure The image that described image sensor photographs when high level part is to corresponding in the waveform of bright frequency is half bright image.
- 19. optical detection apparatus as claimed in claim 15, it is characterised in that described control unit further sets the figure As the regional area of the array of pixels of sensor, and the brightness value of the regional area all pixels is added up, to obtain each image Total luminance value or average brightness value.
- 20. optical detection apparatus as claimed in claim 15, it is characterised in that the further more each image of described control unit Partial pixel brightness value and threshold value, to judge whether described image sensor reads the instruction light source.
- 21. optical detection apparatus as claimed in claim 20, it is characterised in that described image sensor reads the instruction During light source, described control unit improves the frequency of exposure with the synchronous flicker frequency, and after Frequency Synchronization described in reduction Frequency of exposure.
- 22. optical detection apparatus as claimed in claim 20, it is characterised in that described control unit calculating does not read described The image number of light source is indicated, and drives described image sensor to enter dormancy mould when described image number is more than default value Formula.
- 23. optical detection apparatus as claimed in claim 15, it is characterised in that described image sensor has first, second Operator scheme, the frequency of exposure of the first operator scheme are more than the frequency of exposure of the second operator scheme, and the control is single Member control described image sensor operation is adjusted in the first operator scheme with synchronizing, and is controlled after Frequency Synchronization Described image sensor is operated in the second operator scheme.
- 24. optical detection apparatus as claimed in claim 15, it is characterised in that the optical detection apparatus further comprises more Individual imaging sensor, described control unit start one of imaging sensor in park mode and carry out Frequency Synchronization adjustment, and And start the multiple imaging sensor after park mode is left to detect the instruction light source.
- 25. optical detection apparatus as claimed in claim 15, it is characterised in that described control unit is according further to default phase The frequency of exposure of potential difference adjustment described image sensor analyzes each consecutive image to obtain multiple consecutive image groups respectively The brightness value of each image of group, to change adjustment described image sensor according to the brightness of adjacent image.
- 26. optical detection apparatus as claimed in claim 25, it is characterised in that described control unit is further found out with complete The consecutive image group of the adjacent all light image of dark image, and the frequency of exposure for obtaining the consecutive image group is synchronized with institute State the information of flicker frequency；Wherein, when the frequency of exposure of described image sensor is without the synchronous flicker frequency for indicating light source During rate, in the waveform of the frequency of exposure high level and high level in the waveform of the flicker frequency completely to it is corresponding when described in The image that imaging sensor photographs is all light image；High level and the flicker frequency in the waveform of the frequency of exposure The image that described image sensor photographs when low level is to corresponding in waveform is complete dark image.
- 27. optical detection apparatus as claimed in claim 15, it is characterised in that the dutycycle of described image sensor be less than or Equal to the dutycycle of the instruction light source.
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| CN201310198599.XA CN104184952B (en) | 2013-05-24 | 2013-05-24 | Optical detection apparatus and its synchronization adjustment method |
| CN201710334402.9A CN107181919B (en) | 2013-05-24 | 2013-05-24 | Optical detection apparatus |
| CN201710331467.8A CN107277383B (en) | 2013-05-24 | 2013-05-24 | Optical detection apparatus and its synchronization adjustment method |
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| CN201710334402.9A Division CN107181919B (en) | 2013-05-24 | 2013-05-24 | Optical detection apparatus |
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| CN107277383A (en) * | 2013-05-24 | 2017-10-20 | 原相科技股份有限公司 | Optical detection apparatus and its synchronization adjustment method |
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| JP6460829B2 (en) * | 2015-02-20 | 2019-01-30 | キヤノン株式会社 | IMAGING DEVICE, ELECTRONIC DEVICE, AND METHOD FOR CALCULATION OF LIGHT CHANGE CHARACTERISTICS |
| CN106131461A (en) * | 2016-06-28 | 2016-11-16 | 湖北久之洋红外系统股份有限公司 | A kind of multiple image sensor synchronous control system and image processing module |
| WO2021179282A1 (en) * | 2020-03-13 | 2021-09-16 | 深圳市大疆创新科技有限公司 | Method, system, and device for controlling movable platform, and movable platform |
| US11171584B1 (en) * | 2020-05-11 | 2021-11-09 | Pix Art Imaging Inc. | Interpolation circuit and motor driving circuit |
| US11245845B2 (en) * | 2020-06-04 | 2022-02-08 | Hand Held Products, Inc. | Systems and methods for operating an imaging device |
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| JPH0316471A (en) * | 1989-06-14 | 1991-01-24 | Aiwa Co Ltd | Video camera |
| JP3823314B2 (en) * | 2001-12-18 | 2006-09-20 | ソニー株式会社 | Imaging signal processing apparatus and flicker detection method |
| KR100578647B1 (en) * | 2004-04-27 | 2006-05-11 | 매그나칩 반도체 유한회사 | Method for integration of image sensor |
| US8045017B2 (en) * | 2004-05-20 | 2011-10-25 | Omnivision Technologies, Inc. | Methods and systems for detecting flash rate of surrounding lights for controlling camcorder frame rate |
| CN100369467C (en) * | 2005-05-27 | 2008-02-13 | 佛山市顺德区顺达电脑厂有限公司 | Correction method for flash frequency |
| JP4354449B2 (en) * | 2005-10-26 | 2009-10-28 | オリンパス株式会社 | Display image imaging method and apparatus |
| US8068148B2 (en) * | 2006-01-05 | 2011-11-29 | Qualcomm Incorporated | Automatic flicker correction in an image capture device |
| CN100562072C (en) * | 2007-04-06 | 2009-11-18 | 北京中星微电子有限公司 | A kind of method, device and a kind of camera of eliminating the camera image flicker |
| CN101431612B (en) * | 2007-11-08 | 2012-06-20 | 鸿富锦精密工业（深圳）有限公司 | Anti-flicker apparatus and method |
| CN101853091B (en) * | 2009-03-31 | 2013-04-24 | 原相科技股份有限公司 | Optical displacement detection device and operation method thereof |
| CN101866215B (en) * | 2010-04-20 | 2013-10-16 | 复旦大学 | Human-computer interaction device and method adopting eye tracking in video monitoring |
| CN102298452A (en) * | 2010-06-22 | 2011-12-28 | 原相科技股份有限公司 | Method for adjusting an exposure condition of an optical sensor module and an optical sensor module thereof |
| CN104067209B (en) * | 2011-11-11 | 2017-03-22 | 原相科技股份有限公司 | Interactive pointer detection with image frame processing |
| CN104184952B (en) * | 2013-05-24 | 2018-02-02 | 原相科技股份有限公司 | Optical detection apparatus and its synchronization adjustment method |
-
2013
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| CN107277383A (en) * | 2013-05-24 | 2017-10-20 | 原相科技股份有限公司 | Optical detection apparatus and its synchronization adjustment method |
| CN107277383B (en) * | 2013-05-24 | 2019-10-29 | 原相科技股份有限公司 | Optical detection apparatus and its synchronization adjustment method |
Also Published As
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| CN104184952A (en) | 2014-12-03 |
| CN107181919A (en) | 2017-09-19 |
| CN107277383A (en) | 2017-10-20 |
| CN107277383B (en) | 2019-10-29 |
| CN107181919B (en) | 2019-10-29 |
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