CN101232605A - Image obtaining unit - Google Patents
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- CN101232605A CN101232605A CN 200710002644 CN200710002644A CN101232605A CN 101232605 A CN101232605 A CN 101232605A CN 200710002644 CN200710002644 CN 200710002644 CN 200710002644 A CN200710002644 A CN 200710002644A CN 101232605 A CN101232605 A CN 101232605A
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Abstract
The invention relates to a video pick-up apparatus and a video pick-up method. The apparatus comprises a video pick-up camera, a memory unit, a sampling unit as well as a video coder. The video pick-up camera is used for picking up a plurality of videos; the memory unit is coupled to the video pick-up camera and used for storing the videos. The sampling unit is coupled to the memory unit and used for taking samples from the stored videos and outputting the sampled videos. The video coder is coupled to the sampling unit and makes for coding and compression for the sample videos. The method comprises picking up a plurality of videos, storing the videos, taking samples from the stored videos, outputting sampled videos, as well as coding and compressing the sampled videos. The invention can considerably lower the cost of video pick-up apparatus, and meanwhile guarantee the video pick-up camera gains the best transmission effects in all application environments.
Description
Technical field
The present invention relates to a kind of image capture unit, particularly relate to a kind of image capture unit of adjusting different resolutions.
Background technology
In traditional image monitoring, the resolution of its image capture unit is normally fixed.Traditional image capture unit only has a video capture device and an image coding condensing encoder usually, and owing to video capture device institute picked image data is fixed, so the image coding compression unit only can compress and the image of exporting single resolution.System for different frequency ranges can't provide suitable image data, when system's frequency range hour, the image data of high-res just can cause the burden on the system transmissions.In addition,, also can't provide the function of adjusting resolution, reduce the convenience that uses for the application of different occasions.
In conventional art, when needs are exported the image of different resolutions, can utilize a plurality of video capture devices and a plurality of image coder usually, be responsible for acquisition and the image that compresses different resolutions.But such system, explicit costs is higher.And the more diversification of development of supervisory control system at present for example is applied in networking monitoring camera (IP Cam/Security Cam), audio-visual re-recording system (VideoTranscoder), mobile phone, TV, computer, even on auto-navigation system.Therefore, for reaching best image laser propagation effect, the image capture unit of single resolution is obviously to be not enough to meet user's demand.
Summary of the invention
Purpose of the present invention one of them to provide a kind of image capture be device, utilize different sampling rate (sample rate), make image capture unit can adjust and export the image data of different resolutions.
One of them is that a kind of image capture unit is being provided for a purpose of the present invention, utilizes storing media stores institute picked image data, only need capture once, the convenient image compression data that produces different resolutions with adjusting sampling rate.
One of them provides a kind of image acquisition method the object of the invention, and according to different user demands, elder generation carries out image coding, again to export the image data of different resolutions after image data is carried out the sampling of different sampling rates.
For reaching above-mentioned and other purposes, the invention provides a kind of image capture unit, this image capture unit comprises video capture device, mnemon, sampling unit and image coder.Video capture device is in order to capturing a plurality of image datas, and mnemon is coupled to video capture device, in order to store video capture device institute picked image data.Sampling unit is coupled to mnemon, in order to stored image data is taken a sample, and the image data of output sampling according to this.And image coder is coupled to sampling unit, in order to coding and compression sampling image data.
Above-mentioned sampling unit in an embodiment of the present invention, can be adjusted its sampling rate to image data according to a control signal.
From another viewpoint, the present invention proposes a kind of image acquisition method, comprises the following steps: at first, captures a plurality of image datas.Then, store institute's picked image data.Next, stored image data is taken a sample, and output sampling image data.Then, the coding sampling image data above-mentioned with compression.
The present invention utilizes sampling unit, after video capture device institute picked image data is taken a sample, carries out the coding and the compression of image data again.Therefore, only need utilize a video capture device and an image coder, just can adjust and export the image data of different resolutions.Simultaneously,, therefore, only need capture once the convenient image compression data that produces different resolutions with adjusting sampling rate because the image data that is stored in the Storage Media is reusable.Significantly reduce the cost of image capture unit, and make video capture device in different applied environments, all can reach best laser propagation effect.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment of the present invention cited below particularly, and cooperate appended graphicly, be described in detail as follows.
Description of drawings
Fig. 1 is the calcspar of image capture unit according to an embodiment of the invention.
Fig. 2 is the calcspar of image capture unit according to another embodiment of the present invention.
Fig. 3 is the flow chart of image acquisition method according to another embodiment of the present invention.
CS: control signal IDA: image data
SID: sampling image data 100: image capture unit
110: video capture device 120: mnemon
130: sampling unit 140: image coder
132～136: sample circuit S310～S340: flow chart step
Embodiment
Video capture device can be in order to the pick-up image data, the scope of its application is quite extensive, for example video camera, digital still camera, TV box, network video camera (web camera), networking monitoring camera (IP Cam/Security Cam), wireless medium compression transmission box (Wi-Fi Media Pump) etc.Can directly be the digital image signal, or directly convert by analogy or numerical digit signal (for example television image signal) by entity image (for example scenery, animal etc.) acquisition.The video capture device of general reference fechtable image data all can be applicable in the image capture unit of the present invention.
Next, with an embodiment major technique means of the present invention are described.Fig. 1 is the calcspar of image capture unit according to an embodiment of the invention.Image capture unit 100 comprises video capture device 110, mnemon 120, sampling unit 130 and image coder 140.Wherein, mnemon 120 is coupled to video capture device 110 and sampling unit 130.Image coder 140 is coupled to sampling unit 130.
In the present embodiment, sampling unit 130 has multiple sampling mode, and each sampling mode has different sampling rate (for example 1 ,/1/4 or 1/16).Sampling mode with 1/4 is an example, represents that promptly sampling unit 130 can take a sample to per 4 image data IDA in the mnemon 120, forms the image data SID that takes a sample then.If sampling rate is 1/16, represent that then sampling unit 130 can take a sample to 16 image data IDA in the mnemon 120, form the image data SID that takes a sample then.So the image data IDA to mnemon 120 that repeats takes a sample and forms sampling image data SID, then via image coder 140 codings and compression, and exports corresponding image compression data ICD.
And the sampling rate of sampling unit 130 can be controlled by a control signal CS, and control signal CS can be produced by system, or produces via the software formula.So, just the user can adjust the sampling rate of sampling unit 130 according to required image analytic degree, perhaps adjust suitable sampling rate voluntarily, to reach best laser propagation effect by system's (as supervisory control system).In another embodiment of the present invention, when not needing to do the adjustment of resolution as if image capture unit 100, then control signal CS makes sampling unit 130 anergies.When sampling unit 130 was in the state of anergy or does not start, image coder 140 was promptly directly encoded to the image data IDA in the memory body 120 and is compressed.In other words, promptly image coder 140 received sampling image data SID equal image data IDA, just without the image data IDA that takes a sample.
In the configuration aspects of sampling unit 130, sampling unit 130 can be made of logical circuit, or is made of a little processing, or utilizes calculation function own in the system, realizes in the mode that stylizes.Have in the present technique field and to know the knowledgeable usually,, should know above-mentioned sampling unit and all the other possible implementation of control signal and its implementation detail easily by inference and not add tired stating at this via exposure of the present invention.
In another embodiment of the present invention, please refer to Fig. 2, Fig. 2 is the calcspar of image capture unit according to another embodiment of the present invention.Topmost difference is sampling unit 130 among Fig. 2 and Fig. 1 embodiment.In Fig. 2, sampling unit 130 comprises a plurality of sample circuits 132～136.Each sample circuit 132～136 has different sampling rate (for example 1,1/4,1/16), and sampling unit 130 is according to control signal CS decision activation sample circuit 132～136 one of them (for example sample circuit 132).Then sample circuit 132 can be taken a sample per 4 image data IDA in the mnemon 120 according to pairing sampling rate (for example 1/4), forms the image data SID that takes a sample then.The rest may be inferred by analogy for it, do not add tired stating at this.
By another viewpoint, the present invention also proposes a kind of image acquisition method, please be simultaneously with reference to Fig. 1 and Fig. 3.Fig. 3 is the flow chart of image acquisition method according to another embodiment of the present invention.At first, in step S310, capture a plurality of image datas.Then, at step S320, store institute's picked image data.Then, in step S330, stored image data is taken a sample, and export a sampling image data.In this step, can be according to a control signal, adjust the sampling rate (for example 1,1/4,1/16) of image data.Then, in step S340, the sampling image data that coding is obtained with compression.The related implementation detail of the image acquisition method of present embodiment please refer to the explanation of above-mentioned Fig. 1,2 embodiment.Have in the present technique field and to know the knowledgeable usually,, should know by inference easily, do not add tired stating at this via exposure of the present invention.
The present invention is applied to sampling technique in the image capture unit, utilizes single video capture device and single image coder, just the image data of exportable different resolutions.Simultaneously,, therefore, only need capture once, just can produce the image compression data of multiple different resolutions because stored image data is reusable.Not only significantly reduce design cost, more increased the convenience of image capture unit.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (16)
1. image capture unit is characterized in that it comprises:
One video capture device is in order to capture a plurality of image datas;
One mnemon is coupled to this video capture device, in order to store above-mentioned image data;
One sampling unit is coupled to this mnemon, in order to stored above-mentioned image data is taken a sample, and exports a sampling image data; And
One image coder is coupled to this sampling unit, in order to this sampling image data of coding and compression.
2. the image capture unit of image monitoring according to claim 1 is characterized in that wherein said sampling unit has multiple sampling mode, and each above-mentioned sampling mode has different sampling rates.
3. the image capture unit of image monitoring according to claim 2 is characterized in that the sampling rate of wherein said these sampling modes one first sampling mode wherein is 1/4.
4. the image capture unit of image monitoring according to claim 2 is characterized in that the sampling rate of wherein said these sampling modes one second sampling mode wherein is 1/16.
5. the image capture unit of image monitoring according to claim 2 is characterized in that the sampling rate of wherein said these sampling modes one the 3rd sampling mode wherein is 1.
6. the image capture unit of image monitoring according to claim 1 is characterized in that if above-mentioned sampling unit is a disabled state, then this sampling image data equal this image data one of them.
7. the image capture unit of image monitoring according to claim 1 is characterized in that wherein said sampling unit is a logical circuit.
8. the image capture unit of image monitoring according to claim 1 is characterized in that wherein said sampling unit is a microprocessor.
9. the image capture unit of image monitoring according to claim 1 is characterized in that wherein said sampling unit according to a control signal, determines the sampling rate of this sampling unit.
10. the image capture unit of image monitoring according to claim 1, it is characterized in that wherein said sampling unit comprises a plurality of sample circuits, each above-mentioned sample circuit has different sampling rates, and this sampling unit according to the above-mentioned sample circuit of a control signal activation one of them.
11. the image capture unit of image monitoring according to claim 1 is characterized in that wherein said video capture device comprises a video camera.
12. an image acquisition method comprises the following steps:
Capture a plurality of image datas;
Store above-mentioned image data;
Stored above-mentioned image data is taken a sample, and export a sampling image data; And
This sampling image data of coding and compression.
13. the image acquisition method of image monitoring according to claim 12 is characterized in that wherein saidly in the step that this image data is taken a sample, and according to a control signal, adjusts a sampling rate of this image data.
14. the image acquisition method of image monitoring according to claim 13 is characterized in that wherein said sampling rate is 1/4.
15. the image acquisition method of image monitoring according to claim 12 is characterized in that wherein said sampling rate is 1/16.
16. the image acquisition method of image monitoring according to claim 12 is characterized in that wherein said sampling rate is 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710002644 CN101232605A (en) | 2007-01-24 | 2007-01-24 | Image obtaining unit |
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| CN 200710002644 CN101232605A (en) | 2007-01-24 | 2007-01-24 | Image obtaining unit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102413281A (en) * | 2010-12-13 | 2012-04-11 | 松翰科技股份有限公司 | Image acquisition device and image data transmission method thereof |
| CN103916630A (en) * | 2013-01-02 | 2014-07-09 | 中兴保全股份有限公司 | Remote backup monitoring system and photographic device |
| CN104639846A (en) * | 2013-11-12 | 2015-05-20 | 宏正自动科技股份有限公司 | Image switching system, image switching device and image switching method |
| CN111942288A (en) * | 2019-05-14 | 2020-11-17 | 欧特明电子股份有限公司 | Vehicle image system and vehicle positioning method using vehicle image |
-
2007
- 2007-01-24 CN CN 200710002644 patent/CN101232605A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102413281A (en) * | 2010-12-13 | 2012-04-11 | 松翰科技股份有限公司 | Image acquisition device and image data transmission method thereof |
| CN103916630A (en) * | 2013-01-02 | 2014-07-09 | 中兴保全股份有限公司 | Remote backup monitoring system and photographic device |
| CN103916630B (en) * | 2013-01-02 | 2017-11-10 | 中兴保全股份有限公司 | remote backup monitoring system and photographic device |
| CN104639846A (en) * | 2013-11-12 | 2015-05-20 | 宏正自动科技股份有限公司 | Image switching system, image switching device and image switching method |
| CN111942288A (en) * | 2019-05-14 | 2020-11-17 | 欧特明电子股份有限公司 | Vehicle image system and vehicle positioning method using vehicle image |
| CN111942288B (en) * | 2019-05-14 | 2022-01-28 | 欧特明电子股份有限公司 | Vehicle image system and vehicle positioning method using vehicle image |
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