CN105376550A - Image synchronizing method and system - Google Patents
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- CN105376550A CN105376550A CN201410410742.1A CN201410410742A CN105376550A CN 105376550 A CN105376550 A CN 105376550A CN 201410410742 A CN201410410742 A CN 201410410742A CN 105376550 A CN105376550 A CN 105376550A
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Abstract
The invention discloses an image synchronizing method and system. The image synchronizing method is characterized by being suitable for a first image sensing unit and a second image sensing unit. The system comprises a monitoring unit, a prolonged section generation unit and a control unit. The monitoring unit can be used for monitoring the first and second image sensing units and sending a synchronous signal if a time difference of the output time of the second image sensing unit and the first image sensing unit is greater than or equal to a time delay threshold value. The prolonged section generation unit generates a prolonged section according to the time difference and the output rate of a first image. When receiving the synchronous signal, the control unit controls the first image sensing unit to adjust the image output rate of first image data so that the first image data and second image data can be synchronous.
Description
Technical field
The present invention has to relate to a kind of image synchronous method and system thereof, especially a kind of for method and the system thereof of carrying out image synchronous between two image sensing units.
Background technology
In 3D application program, at least two image sensors usually can be used to come scene acquisition depth information, in the future since then the image data of at least two image sensors through to combine and after process, to infer range information and to illustrate in order to construction 3D.And this kind of application is common in and utilizes on the intelligent mobile phone of installation two image sensors or two distributed image sensors carry out the construction of 3D icon.
And the image data of each combining since then at least two image sensors generally involves and performs the synchronous of image frame (frame), even but made by same processing procedure two image sensors out, also atomic little difference may be there is in the speed of its image output frame, for example, when two image sensors are all denoted as output 30 image frames per second, in other words, the output time of each image frame is 33.33... microsecond, right first image sensor only may be accurate to 10 figure places after decimal point, second image sensor is then to be accurate to 12 figure places after decimal point, continual utilize these two image sensors to carry out image capture to scenery time, after some time has elapsed, image output lead time between two image sensors just likely to for foundations 3D rendering or deduction range information have an impact.
Therefore, how the synchronous data from multiple image sensor and effectively deal with data with reduce the cost of image procossing and complexity by the urgent need to.
Summary of the invention
Because the problem of above-mentioned prior art, object of the present invention is exactly that be can the effectively synchronous image produced by multiple image sensor.
Because the problem of above-mentioned prior art, object of the present invention is when synchronous multiple image sensor, can reduce cost and the complexity of image procossing exactly simultaneously.
According to object of the present invention, a kind of image synchronous method is proposed, it is applicable to the first image sensing unit and the second image sensing unit, first image sensing unit system continues to export a plurality of first image data, and every first image data comprises the first frame preliminary sectors and the first presentation content section, second image sensing unit system continues to export a plurality of second image data, and every second image data is containing the second frame preliminary sectors and the second presentation content section, wherein the image length of the first frame preliminary sectors and the first presentation content section equals the image length of the second frame preliminary sectors and the second presentation content section respectively, first image output speed V1 of the first image sensing unit is higher than the second image output speed V2 of the second image sensing unit, image synchronous method comprises the following step: (a) is when the time difference of jth the output time of the second frame preliminary sectors of the second image data and the output time of the first frame preliminary sectors of i-th the first image data is greater than threshold value time of delay, the first image sensing unit is controlled from (i+1) individual first image data by control unit, adding to extend in section to the first presentation content section makes the first presentation content section growth be that the first presentation content extends section and makes the first image output speed be reduced to V3 from V1, the output time of the first frame preliminary sectors of (j+2) individual second image data is made to equal the output time of the second frame preliminary sectors of (i+2) individual first image data.And (b) controls the first image sensing unit from (i+3) individual first image data by control unit, remove the prolongation section that the first presentation content extends section, make the first frame preliminary sectors of (i+3) individual first image data and the output time of the first presentation content section equal the second frame preliminary sectors of (j+3) individual second image data and the output time of the second presentation content section respectively, and reduce the first image output speed and become V1.
Preferably, extend section big little be the product of time difference and the first image output speed.
Preferably, time of delay, threshold value system equaled the summation in the cycle of a plurality of scan lines.
Preferably, time of delay, threshold value equaled the multiple in the cycle of each a plurality of scan line.
Preferably, the first image sensing unit and the second image sensing unit system are arranged on electronic installation or on different electronic installation.
Preferably, step (a) and (b) repeat.
Based on above-mentioned purpose, the present invention reoffers a kind of image synchronous system, it is applicable to the first image sensing unit and the second image sensing unit, first image sensing unit system continues to export a plurality of first image data, and the first image data comprises the first frame preliminary sectors and the first presentation content section, second image sensing unit system continues to export a plurality of second image data, and the second image data is containing the second frame preliminary sectors and the second presentation content section, wherein the image length of the first frame preliminary sectors and the first presentation content section equals the image length of the second frame preliminary sectors and the second presentation content section respectively, first image output speed V1 of the first image sensing unit is higher than the second image output speed V2 of the second image sensing unit, image synchronous system comprises: monitoring means, extend section generation unit and control unit.Monitoring means can in order to monitor the first image sensing unit and the second image sensing unit, when jth the output time of the second frame preliminary sectors of the second image data is more than or equal to threshold value time of delay with the time difference of the output time of the first frame preliminary sectors of i-th the first image data, transmission sync signal.Extend section generation unit, extend section according to time difference and the first image output speed to produce.And control unit, when receiving sync signal, control unit controls to extend section generation unit and produces prolongation section, and from (i+1) individual first image data, control unit adds prolongation section to the first presentation content section makes the first presentation content section growth be that the first presentation content extends section and makes the first image output speed be down to V3 from V1, the output time of the first frame preliminary sectors of (j+2) individual second image data is made to equal the output time of the second frame preliminary sectors of (i+2) individual first image data, and from (i+3) individual first image data, control unit controls the first image sensing unit to remove the prolongation section that the first presentation content extends section, the first frame preliminary sectors of the first image data and the output time of the first presentation content section is made to equal the second frame preliminary sectors of the second image data and the output time of the second presentation content section respectively and the first image output speed system is reduced into V1.
Preferably, extend section big little be the product of time difference and the first image output speed.
Preferably, time of delay, threshold value system equaled the summation in the cycle of a plurality of scan lines.
Preferably, the first image sensing unit and the second image sensing unit system are arranged on electronic installation or on different electronic installation.
Accompanying drawing explanation
Fig. 1 is the calcspar of image synchronous system of the present invention.
Fig. 2 A is the first schematic diagram of image synchronous system of the present invention.
Fig. 2 B is the second schematic diagram of image synchronous system of the present invention.
Fig. 2 C is the 3rd schematic diagram of image synchronous system of the present invention.
Fig. 2 D is the 4th schematic diagram of image synchronous system of the present invention.
Fig. 2 E is the 5th schematic diagram of the image synchronous system of the present invention.
Fig. 3 is the flow chart of steps of the image synchronous method of the present invention
Embodiment
Refer to Fig. 1, it is the calcspar of the image synchronous system of the present invention.Image synchronous system 100 in figure is applicable to the first image sensing unit 10 and the second image sensing unit 20, and this first image sensing unit 10 and the second image sensing unit 20 can be camera lens.First image sensing unit 10 is continue to export a plurality of first image data 11, and the first image data 11 comprises the first frame preliminary sectors 12 and the first presentation content section 13.
Also continue to export a plurality of second image data 21 as the first image sensing unit 10, second image sensing unit 20, and the second image data 21 is containing the second frame preliminary sectors 22 and the second presentation content section 23.Wherein this first image sensing unit 10 and the second image sensing unit 20 can be arranged on electronic installation or be arranged on different electronic installation.
The image length of the first frame preliminary sectors 12 and the first presentation content section 13 equals the image length of the second frame preliminary sectors 22 and the second presentation content section 23 respectively, and the first image output speed 14 (V1) of the first image sensing unit 10 is approximate and a little more than the second image output speed 24 (V2) of the second image sensing unit 20.
In this embodiment, the first image sensing unit 10 and the second image sensing unit 20 are carry out image capture to object simultaneously, to produce the first image data 11 and the second image data 21 respectively.This first image data 11 and the second image data 21 can in order to the depth of view information setting up 3D composition or carry out measuring this object.
This image synchronous system 100 comprises monitoring means 50, extends section generation unit 60 and control unit 30, and this image synchronous system 100 is be electrically connected to described first image sensing unit 10 and described second image sensing unit 20.Monitoring means 50 monitors the first image sensing unit 10 and the second image sensing unit 20 to determine whether the first image sensing unit 10 and the second image sensing unit 20 must carry out synchronously, and its judgment mode is as described below.
When jth the output time of the second frame preliminary sectors 22 of the second image data 21 is more than or equal to threshold value 42 time of delay with the time difference (not being shown in figure) of the output time of the first frame preliminary sectors 12 of i-th the first image data 11, send sync signal 62 to control unit 30 to carry out follow-up synchronously processing.
Extending section generation unit 60 is extend section 61 according to time difference and the first image output speed 14 to produce, and wherein this size extending section 61 is the product of time difference and the first image output speed 14.
When control unit 30 receives sync signal 62, namely control unit 30 controls to extend section generation unit 60 and produces prolongation section 61, and from (i+1) individual first image data 11, control unit 30 adds prolongation section 61 to the first presentation content section 13 makes the first presentation content section 13 growth be that the first presentation content extends section (not being shown in figure), and make the first image output speed 14 be down to V3 from V1, the output time of the first frame preliminary sectors 12 of (j+2) individual second image data 21 is made to equal the output time of the second frame preliminary sectors 22 of (i+2) individual first image data 11.
And start from (i+3) individual first image data 11, control unit 30 more controls the first image sensing unit 10 and removes the first presentation content and extend the prolongation section 61 of section, makes the first frame preliminary sectors 12 of the first image data 11 and the output time of the first presentation content section 13 equal the second frame preliminary sectors 22 of the second image data 21 and the output time of the second presentation content section 23 respectively and the first image output speed 14 is be reduced into V1.
See also Fig. 2 A to Fig. 2 E, it is the first schematic diagram ~ the 5th schematic diagram of the image synchronous system of the present invention, it represents that the first image sensing unit 10 and the second image sensing unit 20 continue the schematic diagram of output first image data 11 and the second image data 21 respectively, the time point of this first image data 11 and the second image data 21 is observed in every bit representative in horizontal direction, using microsecond as its unit.Wherein each first image data 11 comprises the first frame preliminary sectors 12 (startofframe, and the first presentation content section 13 (frame) SOF), each second image data 21 comprises the second frame preliminary sectors 22 (startofframe, SOF) and the second presentation content section 23 (frame), and time of delay threshold value 42 be x microsecond.
Fig. 2 A shows the synchronization scenario of the first image sensing unit 10 and the second image sensing unit 20 at the beginning, and now the output time system of the 0th the first frame preliminary sectors 12 and the 0th the first presentation content section 13 equals the output time of the 0th the second frame preliminary sectors 22 and the 0th the second presentation content section 23 respectively.
Because the image output speed of the first image sensing unit 10 is slightly larger than the image output speed of the second image sensing unit 20, Fig. 2 B shows when after after a while, now monitoring means (not being shown in figure) monitors i-th the first frame preliminary sectors 12 and will export x microsecond ahead of time than i-th the second frame preliminary sectors 22, that is arrive threshold value 42 set time of delay, namely send sync signal (not being shown in figure) to control unit 30 (not being shown in figure).
Fig. 2 C controls the first image sensing unit 10 (not being shown in figure) from (i+1) individual first image data 11 by control unit (not being shown in figure), add after extending section 61 to the first presentation content section 13 to form a first new presentation content prolongation section 43, can find out by figure, now namely the output time of the first frame preliminary sectors 12 of (i+2) individual first image data 11 equals the second frame preliminary sectors 22 of (i+2) individual second image data 21, and after adding this prolongation section 61, the image output speed of original first image sensing unit 10 just presents and slightly declines.
Fig. 2 D controls the first image sensing unit 10 from (i+2) individual first image data 11 by control unit (not being shown in figure), prolongation section 61 is extended section 43 from the first presentation content remove, now namely the first frame preliminary sectors 12 of (i+3) individual first image data 11 and the output time of the first presentation content section 13 equal the second frame preliminary sectors 22 of (i+3) individual second image data 21 and the output time of the second presentation content section 23, as shown in Figure 2 E.
It is worth mentioning that, this producing method extending section 61 is for can be the threshold value 42 and product of the first image output speed 14 time of delay, and preferably threshold value 42 time of delay is set as the summation in the cycle of a plurality of scan lines 63 by execution mode system.Its reason is that the minimum unit forming each the first image data 11 is pixel (pixel), and multiple pixel system is arranged on the scan line 63 of level, then forms the first image data 11 by a plurality of scan lines 63.
In detail, when the cycle of the first image data 11 is 33.3333 milliseconds and this first image data 11 is made up of 720 scan lines 63, therefore the cycle that can calculate each scan line 63 is about 1.375 microseconds (0.001375=33.3333/720), then this, threshold value 42 can be set to the multiple in scan line 63 cycle time of delay, the first image sensing unit 10 is produced when this extends section 61 and adds complete scan line 63.
Refer to Fig. 3, it is the flow chart of steps of the image synchronous method of the present invention.This image synchronous method, be applicable to the first image sensing unit and the second image sensing unit, first image sensing unit system continues to export a plurality of first image data, and the first image data comprises the first frame preliminary sectors and the first presentation content section, second image sensing unit system continues to export a plurality of second image data, and the second image data is containing the second frame preliminary sectors and the second presentation content section, wherein the image length of the first frame preliminary sectors and the first presentation content section equals the image length of the second frame preliminary sectors and the second presentation content section respectively, first image output speed V1 of the first image sensing unit is higher than the second image output speed V2 of the second image sensing unit, described image synchronous method comprises the following step.
Step S1 system is when the time difference of jth the output time of the second frame preliminary sectors of the second image data and the output time of the first frame preliminary sectors of i-th the first image data is greater than threshold value time of delay, the first image sensing unit is controlled from (i+1) individual first image data by control unit, adding to extend in section to the first presentation content section makes the first presentation content section growth be that the first presentation content extends section and makes the first image output speed be reduced to V3 from V1, the output time of the first frame preliminary sectors of (j+2) individual second image data is made to equal the output time of the second frame preliminary sectors of (i+2) individual first image data.The detailed content of this step corresponding as shown in Fig. 2 B and Fig. 2 C, therefore does not repeat at this.
Step S2 system controls the first image sensing unit from (i+3) individual first image data by control unit, remove the prolongation section that the first presentation content extends section, make the first frame preliminary sectors of (i+3) individual first image data and the output time of the first presentation content section equal the second frame preliminary sectors of (j+3) individual second image data and the output time of the second presentation content section respectively, and reduce the first image output speed and become V1.The detailed content of this step corresponding as shown in Fig. 2 D and Fig. 2 E, therefore does not repeat at this.
Utilize repeated execution of steps S1 and S2, the first image sensing unit and the second image sensing unit can automatically carry out synchronously, to reach the object of synchronous multiple image sensing unit.
Comprehensive the above, the image synchronous system of the present invention and method thereof really can the effectively synchronous images produced by two image sensing units, further, the method also can be applicable on multiple image sensing unit, and when synchronous multiple image sensor, this synchronous method can reduce cost and the complexity of image procossing in the lump.
The embodiment of the above is only technological thought and feature that the present invention is described, the content that its object enables the person skilled in the art understand the present invention is also implemented according to this, when can not with the scope of the claims of restriction the present invention, namely the equalization generally done according to disclosed spirit changes or modifies, and must be encompassed in the scope of the claims of the present invention.
Claims (10)
1. an image synchronous method, be applicable to the first image sensing unit and the second image sensing unit, described first image sensing unit system continues to export a plurality of first image data, and a plurality of first image data described in each comprises the first frame preliminary sectors and the first presentation content section, described second image sensing unit system continues to export a plurality of second image data, and a plurality of second image data described in each is containing the second frame preliminary sectors and the second presentation content section, the image length of wherein said first frame preliminary sectors and described first presentation content section equals the image length of described second frame preliminary sectors and described second presentation content section respectively, first image output speed V1 of described first image sensing unit is higher than the second image output speed V2 of described second image sensing unit, described image synchronous method is characterized in that, comprise:
A () is when the time difference of jth the output time of described second frame preliminary sectors of described second image data and the output time of the described first frame preliminary sectors of i-th described first image data is greater than threshold value time of delay, described first image sensing unit is controlled from (i+1) individual described first image data by control unit, adding to extend in section to described first presentation content section makes described first presentation content section growth be that the first presentation content extends section and makes described first image output speed be reduced to V3 from V1, the output time of the described first frame preliminary sectors of (j+2) individual described second image data is made to equal the output time of the described second frame preliminary sectors of (i+2) individual described first image data, and
B () controls described first image sensing unit from (i+3) individual described first image data by described control unit, remove the described prolongation section that described first presentation content extends section, make the described first frame preliminary sectors of (i+3) individual described first image data and the output time of described first presentation content section equal the described second frame preliminary sectors of (j+3) individual described second image data and the output time of described second presentation content section respectively, and reduce described first image output speed and become V1.
2. image synchronous method as claimed in claim 1, is characterized in that, wherein said prolongation section big little be the product of described time difference and described first image output speed.
3. image synchronous method as claimed in claim 1, is characterized in that, wherein said time of delay, threshold value system equaled the summation in the cycle of a plurality of scan lines.
4. image synchronous method as claimed in claim 3, is characterized in that, wherein said time of delay, threshold value equaled the multiple in the cycle of a plurality of scan lines described in each.
5. image synchronous method as claimed in claim 1, it is characterized in that, wherein said first image sensing unit and described second image sensing unit system are arranged on electronic installation or on different electronic installation.
6. image synchronous method as claimed in claim 1, it is characterized in that, wherein step (a) and (b) repeat.
7. an image synchronous system, be applicable to the first image sensing unit and the second image sensing unit, described first image sensing unit system continues to export a plurality of first image data, and a plurality of first image data described in each comprises the first frame preliminary sectors and the first presentation content section, described second image sensing unit system continues to export a plurality of second image data, and a plurality of second image data described in each is containing the second frame preliminary sectors and the second presentation content section, the image length of wherein said first frame preliminary sectors and described first presentation content section equals the image length of described second frame preliminary sectors and described second presentation content section respectively, first image output speed V1 of described first image sensing unit is higher than the second image output speed V2 of described second image sensing unit, described image synchronous system is characterized in that, comprise:
Monitoring means, system is in order to monitor described first image sensing unit and described second image sensing unit, when jth the output time of described second frame preliminary sectors of described second image data is more than or equal to threshold value time of delay with the time difference of the output time of the described first frame preliminary sectors of i-th described first image data, transmission sync signal;
Extend section generation unit, extend section according to described time difference and described first image output speed to produce; And
Control unit, when receiving described sync signal, described control unit controls described prolongation section generation unit and produces described prolongation section, and from (i+1) individual described first image data, described control unit adds prolongation section to described first presentation content section makes described first presentation content section growth be that the first presentation content extends section and makes described first image output speed be down to V3 from V1, the output time of the described first frame preliminary sectors of (j+2) individual described second image data is made to equal the output time of the described second frame preliminary sectors of (i+2) individual described first image data, and from (i+3) individual described first image data, described control unit controls described first image sensing unit to remove the described prolongation section that described first presentation content extends section, the described first frame preliminary sectors of described first image data and the output time of described first presentation content section is made to equal the described second frame preliminary sectors of described second image data and the output time of described second presentation content section respectively and described first image output speed system is reduced into V1.
8. image synchronous system as claimed in claim 7, is characterized in that, wherein said prolongation section big little be the product of described time difference and described first image output speed.
9. image synchronous system as claimed in claim 7, is characterized in that, wherein said time of delay, threshold value system equaled the summation in the cycle of a plurality of scan lines.
10. image synchronous system as claimed in claim 7, it is characterized in that, wherein said first image sensing unit and described second image sensing unit system are arranged on electronic installation or on different electronic installation.
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