CN1228737C - Method for digital image processing and method for multi-purpose data processing - Google Patents
Method for digital image processing and method for multi-purpose data processing Download PDFInfo
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- CN1228737C CN1228737C CN 01110225 CN01110225A CN1228737C CN 1228737 C CN1228737 C CN 1228737C CN 01110225 CN01110225 CN 01110225 CN 01110225 A CN01110225 A CN 01110225A CN 1228737 C CN1228737 C CN 1228737C
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Abstract
The present invention relates to a method for processing a digital image and a method for processing multi-purpose data. General adopted digital image compression has two modes of a self-set image compression format and a standard image compression format, and the two digital image compression modes have limits and defects when applied. The present invention mainly aims to improve the limits and the defects of the two methods, and a continuous dynamic digital image is compressed into two groups of image compression formats with different compression ratios. The two groups of compression images with different compression ratios are transmitted to a personal computer via a standard peripheral interface of a computer system, and the present invention can solve and improve the limits and the defects of a single image compression mode.
Description
The present invention relates to a kind of method of computer system data processing, particularly a kind of computer system image process method can reduce CPU (central processing unit) (Central Processing Unit, load CPU) (loading) and improve its service efficiency.
Along with semiconductor and digital signal processing (Digital Signal Process, DSP) development of technology, and diversified development of computer and application, digital camera (digital camera) become gradually PC indispensable peripherals.In order to make general consumption masses more be ready to buy and to use digital camera, then must make digital camera be mounted at an easy rate and use, and reduce the expense that increases digital camera institute palpus.In order to meet 2 above-mentioned requirements, the standard peripheral (standard peripheralinterface) that best selection just is to use present PC all to have, as with the connecting interface of digital camera, ECP/EPP and USB then become present optimal selection.
At present (Personal Computer, the PC) ECP/EPP that is equipped with (extended capabilities port/enhancing parallel port) peripheral interface approximately can provide the data transmission frequency range (bandwidth) of per second 5Mbits～12Mbits to PC; And USB (USB (universal serial bus)) peripheral interface of (full speed) at a high speed then can provide the data transmission frequency range of per second 12Mbits.But transmit the digital video image (digitalvideo) of per second 30 frames (frame) CIF (Common Interchange Format) form, its data volume is up to per second 48.66048Mbits (352 * 288 * 2 * 8 * 30).Therefore obviously, continuously dynamic digital video image must be earlier via digital video image compression (digitalvideo compression), could be via the standard peripheral of ECP, EPP or USB, and be sent to PC.
Please refer to Fig. 1, general video image is after imageing sensor (image sensor) 11 captures, after the processing via CDS (sampling of Correlation Duplex Sampling simple crosscorrelation duplex)/AGC (automatic gain control) 12, ADC (analog to digital conversion) 13, signal processor (signal processor) 14 etc., and convert digital picture format to.After this continuous dynamic digital images must be earlier carried out digital image compression via compression unit (compress unit) 20, could be via the standard peripheral 50 of ECP, EPP or USB, and be sent to PC 30.This moment, the general digital image compression that adopts can have following dual mode, the one, adopt the own image compression format of being formulated (proprietary video compression format dedicated video compressed format), another is that the image compression format of employing standard is (as MPEG, H.261, H.263... or the like).And these two kinds of digital image compression modes respectively have its restriction and shortcoming when it is used.
When adopting the image compression format of oneself being formulated, after dynamic digital images must be compressed into the own image compression format of being formulated earlier continuously, after just being sent to PC 30 via the standard peripheral 50 of ECP, EPP or USB, CPU (not shown) on the PC 30 must be carried out the program that decompresses earlier just can be reduced into original video image, also just can see the video image that is grabbed from PC 30; And then via the CPU on the PC 30 with this reduction after digital picture recompress into the image compression format of standard (as MPEG, H.261, H.263, ... or the like), and be stored in storage unit 40 (as hard disk, numerical tape, CD, DVD, short-access storage ... or the like), or send out via communication network (communication network) 40.Adopt the compression method of this own image compression format of being formulated, video image is via just being stored into storage unit 40 after the program of compression-decompression-compression or sending out via communication network 60, it finally decompresses again and reduces the video image quality of returning must be relatively poor, and the CPU on the PC 30 must carry out the program of decompression-compression, therefore the burden of CPU is very heavy, and needs the very strong CPU of processing power.
When adopting the image compression format of standard, dynamic digital images must be compressed into the image compression format of standard earlier (as MPEG continuously, H.261, H.263, ... or the like) after, just via ECP, the standard peripheral 50 of EPP or USB is sent to PC 30, CPU on the PC 30 must first operative norm the program that decompresses of image compression format just can be reduced into original video image, also just can see the video image that is grabbed from PC 30, and PC 30 is via the bit stream (bitstream) of the received standard picture compressed format of the standard peripheral 50 of ECP/EPP or USB, can directly be stored in to store or send out via communication network 60.Adopt the compression method of the image compression format of this standard, the gunzip of the image compression format that the CPU on the PC 30 need only operative norm, so the load of CPU can alleviate, but still need the strong CPU of processing power.Moreover in the application of some (as video conference or visual telephone), owing to be subject to the characteristic (as the restriction of the capacity of storage unit or the restriction of the frequency range of communication network) of application, and must adopt higher ratio of compression (compression ratio), its quality also can be relatively poor for the video image of being seen on the PC 30 this moment (CPU decompresses and video image that reduction is returned).
Therefore, fundamental purpose of the present invention is to improve the restriction and the shortcoming of above-mentioned these two kinds of methods; Continuous dynamic digital images is compressed into the image compression format of two groups of different ratio of compression, solves the restriction that is used alone the compression of images mode.
For achieving the above object, a first aspect of the present invention proposes a kind of method of Digital Image Processing, it comprises the steps: at first, with a compression unit continuous dynamic digital images is compressed into the compressed image of first and second image compression format, and first compressed format is lower than the ratio of compression of second image compression format.Then, via a standard peripheral compressed image of first and second compressed formats is sent to a PC.Then, carry out simple image decompressor program, the compressed image of first image compression format is reduced into original digital picture, and output is shown in the screen of PC; And the compressed image that stores second image compression format is in a storage unit or transmit the compressed image of second image compression format by a communication network.
So, PC is as long as carry out simple image decompressor program, and the compressed image of first image compression format is reduced into original digital picture, just image can be shown in the screen of PC; And PC can be directly be stored in storage unit with the compressed image of second image compression format, perhaps by communication network the compressed image of second image compression format is sent to external system; Using such method can lower the work load of PC CPU.
As selection, described first compressed format can comprise image compression format that user oneself formulated, JBIG form, jpeg format, mpeg format, H.261 form or form H.263.
As selection, described standard peripheral can comprise ECP standard peripheral, EPP standard peripheral, USB standard peripheral, UART standard peripheral, IR standard peripheral or PCI standard peripheral.
As selection, described storage unit comprises hard disk, numerical tape, CD, DVD or short-access storage.
For realizing purpose of the present invention, a second aspect of the present invention proposes the method that a kind of multi-purpose data is handled, it comprises the steps: at first, the compression that one raw data is carried out is in various degree handled, be compressed into first and second packed datas, and first packed data has lower ratio of compression than second packed data.Then, transmit first and second packed datas to a data processing equipment.Then, data processing equipment decompresses first packed data and is reduced into raw data, and directly output is shown in a supervising device; And data processing equipment stores second packed data and transmits second packed data in a storage unit or by a communication network.The second above-mentioned packed data is a standard compression form that is compressed by a standard compression program, so the application that can directly store or transmit.So, data processing equipment is reduced into original data as long as carry out simple gunzip with first packed data, just can be with data presentation in supervising device; And data processing equipment can directly be stored in storage unit with second packed data, perhaps by communication network second packed data is sent to external device (ED); Using such method can lower the work load of data processing equipment.
As selection, described application is handled and can be comprised that storing this second packed data transmits this second packed data in a storage unit and by a communication network.
As selection, the standard compression form that described second packed data can be compressed by a standard compression program.
As selection, described data processing equipment can comprise PC.
As selection, described supervising device can comprise screen.
As selection, described supervising device comprises loudspeaker.
Compare with existing the reception, adopt the method for the invention described above, continuous dynamic digital images is compressed into the image compression format of two groups of different ratio of compression, the compressed image of these two groups different ratio of compression is sent to PC via the computer system standard peripheral, can lower the work load of PC CPU, also can reduce the load of data processing equipment, because it only need carry out the gunzip of the packed data of low compression ratio, and then the usefulness of raising data processing equipment.
For above-mentioned and other purposes of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below:
Fig. 1 is the annexation figure of a kind of digital camera and computer system; And
Fig. 2 is a kind of data processing method synoptic diagram proposed by the invention.
Purpose of the present invention mainly is to improve the shortcoming of above-mentioned these two kinds of methods simultaneously, just dynamic digital images enters into compression unit 20 (Fig. 1) afterwards continuously, simultaneously continuous dynamic digital images is compressed into the image compression format of two groups of different ratio of compression.Wherein one group is that continuous dynamic digital images is compressed into the image compression format of standard (as MPEG, H.261, H.263, ... or the like), the compressed image compressed format of these standards is logical to be to adopt comparatively complicated compression algorithm (compression algorithm), improving its ratio of compression, and the needs of realistic application (as the restriction of the capacity of storage unit or the restriction of the frequency range of communication network); Another group then is to adopt comparatively simple compression algorithm, with continuous dynamic digital images be compressed into comparatively simple standard picture compressed format (as JBIG, JPEG ... or the like) or the own image compression format of being formulated.The compressed image of these two groups different ratio of compression is sent to PC 30 (Fig. 1) via the standard peripheral 50 (Fig. 1) of ECP, EPP or USB simultaneously.
Though adopt comparatively simple compression algorithm, continuous dynamic digital images is compressed into comparatively simple standard picture compressed format (as JBIG, JPEG, ... or the like) or during the own image compression format of being formulated, though the ratio of compression of this image is lower, it the decompression characteristic of carrying out image is easily arranged and decompress after reduction its distortion of video image of returning less and better picture quality arranged.After the lower image of this group ratio of compression is sent to PC via the standard peripheral of ECP, EPP or USB, CPU on the PC only need carry out simple image decompressor program just can be reduced into original image, and can see the raw video image of the less and better quality of distortion from personal computer screens.
Another group then is that continuous dynamic digital images is compressed into the image compression format of standard (as MPEG, H.261, H.263, ... or the like) after, just the standard peripheral via ECP, EPP or USB is sent to PC, PC receives after the image of this group standard picture compressed format, needn't carry out the gunzip of any complex image compressed format, and can be applied directly to actual needs, send out at storage device or via communication network as compressing image storage later.
The present ECP/EPP peripheral interface that is equipped with of PC approximately can provide the data transmission frequency range of per second 5Mbits～12Mbits; And USB peripheral interface at full speed then can provide the data transmission frequency range of per second 12Mbits.Under general applicable cases, the image compression format of standard is (as MPEG, H.261, H.263 ... or the like) its must the data frequency range do not wait from tens of Kbits～3Mbits approximately, therefore when using, for higher frame rate (frame rate) and optimum picture quality can be arranged, must be at the situation of practical application, and remove to control compression unit, make it can flexibly adjust second group ratio of compression, and obtain best effect and picture quality.
Therefore, continuous dynamic digital images is compressed into simultaneously the image compression format of two groups of different ratio of compression, after simultaneously two groups of different ratio of compression compressed images being sent to PC via the standard peripheral of ECP, EPP or USB again, CPU on the PC only need carry out simple image decompressor program just can become original image by the image restoring that ratio of compression is lower, and can see the raw video image of the less and better quality of distortion from personal computer screens; In addition via the method with the image compression format of standard (as MPEG, H.261, H.263, ... or the like) be stored in the compression of storage unit or the standard picture that sends out via communication network, it reduces the video image of returning at last and also has preferable quality via gunzip, and the burden of CPU is lighter on the PC, can allow CPU remove to carry out other application, makes PC have how better function.
Moreover, the standard peripheral of above-mentioned transmitted image data does not limit the standard peripheral of having only ECP, EPP or USB, and it more can be the standard peripheral of UART (Universal AsynchronousReceiver/Transmitter UART Universal Asynchronous Receiver Transmitter), IR (Infrared infrared ray) or PCI (peripheral components expansion interface) etc.
The foregoing description more can be applied to general multi-purpose data processing in addition, this multi-purpose data is handled usually and is resent to computer system after the compressed processing earlier of its raw data, and this computer system must be monitored the original contents of the data of this storage, transmission or other processing modes, for example with a screen, loudspeaker or its similar supervising device, monitor or monitor this and store, transmit or the original contents of the data of other processing modes, and packed data stored, transmits or other are handled etc.
Below please refer to Fig. 2, in order to a kind of multi-purpose data disposal route of the present invention to be described.
The compression of at first a raw data being carried out is in various degree handled, and is compressed into the packed data C1 and the C2 of two kinds of different ratio of compression, and transmit simultaneously these two kinds with the packed data C1 of ratio of compression and C2 to data processing equipment 70.After data processing equipment 70 received these the two kinds packed data C1 and C2 with ratio of compression, the packed data C1 that data processing equipment 70 can be lower with ratio of compression immediately decompressed and is reduced into raw data D1 and is output in monitoring (monitoring or monitoring) device; Data processing equipment 70 can directly be stored in the packed data C2 with standard compression form storage device or transmit packed data C2 by a communication network simultaneously.
Because this multi-purpose data disposal route becomes compressing original data the packed data of two kinds of different ratio of compression earlier, so directly output after can utilizing the packed data of low compression ratio to decompress, and utilize the packed data of high compression ratio and standard compression form to make data storage or data transmission.By above-mentioned method, can reduce the load of data processing equipment, because it only need carry out the gunzip of the packed data of low compression ratio, and then the usefulness of raising data processing equipment.
Though the present invention with preferred embodiment openly as above; right its is not in order to qualification the present invention, any this area professional and technical personnel, without departing from the spirit and scope of the present invention; when can doing various changes and change, so protection scope of the present invention is defined by accompanying Claim and is as the criterion.
Claims (18)
1. the method for a digitized video processing comprises:
With continuously dynamic digitized video, be compressed into the compressing image of first and second image compressed format with a compression unit, this first compressed format is low than the compression factor of this second image compressed format;
Via a standard peripheral compressing image of this first and second compressed format is sent to a personal computer;
Carry out simple image gunzip, the compressing image of this first image compressed format is reduced into original digitized video, and output is shown in the screen of this personal computer; And
Carrying out a specified handler group, wherein is the compressing image of this second image compressed format to be stored in a storage assembly or to desire to transmit with a communication network selected this specified handler group of compressing image of this second image compressed format according to desire.
2. method according to claim 1 is characterized in that, described this first compressed format can the ordered image compressed format of the person of being to use oneself.
3. method as according to claim 1 is characterized in that described this first compressed format comprises JBIG.
4. method as according to claim 1 is characterized in that described this first compressed format comprises JPEG.
5. method as according to claim 1 is characterized in that described this second compressed format comprises MPEG.
6. method as according to claim 1 is characterized in that H.261 described this first compressed format comprise.
7. method as according to claim 1 is characterized in that H.263 described this first compressed format comprise.
8. method as according to claim 1 is characterized in that described this standard peripheral comprises an ECP standard peripheral.
9. method as according to claim 1 is characterized in that described this standard peripheral comprises an EPP standard peripheral.
10. method as according to claim 1 is characterized in that described this standard peripheral comprises a USB standard peripheral.
11. the method as according to claim 1 is characterized in that described this standard peripheral comprises a UART standard peripheral.
12. the method as according to claim 1 is characterized in that described this standard peripheral comprises an IR standard peripheral.
13. the method as according to claim 1 is characterized in that described this standard peripheral comprises a PCI standard peripheral.
14. the method as according to claim 1 is characterized in that described this storage assembly comprises hard disk.
15. the method as according to claim 1 is characterized in that described this storage assembly comprises numerical tape.
16. the method as according to claim 1 is characterized in that described this storage assembly comprises CD.
17. the method as according to claim 1 is characterized in that described this storage assembly comprises DVD.
18. the method as according to claim 1 is characterized in that described this storage assembly comprises flash memory.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 01110225 CN1228737C (en) | 2001-04-02 | 2001-04-02 | Method for digital image processing and method for multi-purpose data processing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 01110225 CN1228737C (en) | 2001-04-02 | 2001-04-02 | Method for digital image processing and method for multi-purpose data processing |
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| CN1379363A CN1379363A (en) | 2002-11-13 |
| CN1228737C true CN1228737C (en) | 2005-11-23 |
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