CN1305314C - Method of date degeneration for image storage system - Google Patents
Method of date degeneration for image storage system Download PDFInfo
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- CN1305314C CN1305314C CNB2003101165639A CN200310116563A CN1305314C CN 1305314 C CN1305314 C CN 1305314C CN B2003101165639 A CNB2003101165639 A CN B2003101165639A CN 200310116563 A CN200310116563 A CN 200310116563A CN 1305314 C CN1305314 C CN 1305314C
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Abstract
The present invention relates to a method of date decrement for an image storage system, which reduces an image row every N rows for image rows at the left side and the right side of an image according to a certain proportion so as to reduce the data quantity of the image; secondly, images of which the data quantity is reduced are transferred into an image encoder for coding and storage; the images which are coded are transferred into an image decoder through a transmission channel; the images which are coded are decoded by the image decoder; a point supplement operation is carried out on the images which are reduced in the images which are decoded.
Description
Technical field
The invention relates to the technical field that image data is handled, refer to a kind of method that is used to be applied to image reservoir system data degeneracy especially.
Background technology
Along with popularizing of image and multimedia application, video signal compression and decompression technique are recently by a large amount of uses, so-called image compression is according to certain similitude principle is arranged between the moving image consecutive frame, see through motion prediction, with reference to the similar situation of former frame image and this two field picture, removing the redundant data similar, and only write down this frame data different with previous frame to former frame, thereby improved the compression efficiency of video data greatly, this compression method is also referred to as the relevant compression of frame.The image compression is a unit with image sets (GOP), is made of I frame B, P frame.Generally speaking, an image sets (GOP) is made up of 15 frames, and first frame is an I frame, is followed successively by 1 P frame, and 2 B frames constitute IPBB PBB PBB...... structure thus.The I frame is called reference frame, and the called reference frame is all start frames of reference of other frames, so the I frame is the frame that can put down in writing this frame all images data fully.Also be called full frame.The P frame is a forward predicted frame, be according to the comparison of former frame image, remove the data similar and the frame that constitutes to preceding frame.The B frame is walked bi-directional predicted frames, is the frame that obtains according to the comparison with front and back one two field picture.P, B frame are incomplete frames, and it need rely on the I frame and set up.
Yet, being subject to the standard specification of DRAM product, the DRAM that uses as the image buffer can only have the capacity of some specific standards.If consider cost again, with regard to each the hardwood data quantity (subsidiary other information of still needing) that compresses through image at last, still normal capacity greater than the general DRAM standardized product that uses, in order to reduce the picture data amount, to cooperate the specification of existing DRAM standardized product, the figure shelves that image compression is handled are further compression again, the practice at present commonly used is once only to handle the image of field, this can increase the processing time, and then the reduction overall system efficiency, so image reservoir system data degeneracy method commonly used gives improved necessity in fact.
Summary of the invention
Main purpose of the present invention is that a kind of method that is applied to image reservoir system data degeneracy is being provided, and makes the material to desiring to carry out the image compression/de-compression carry out degeneracy, to cooperate the specification of existing DRAM standardized product.
For reaching above-mentioned purpose, in the method that is applied to image reservoir system data degeneracy proposed by the invention, be that the data of desiring to carry out the image compression/de-compression is carried out degeneracy, this system comprises an image coder and an image-decoding device, this image coder is in order to be sent to this image-decoding device with seeing through a transmission channel after the image coding of input, to decode and output by this image-decoding device, this input image comprises plural image capable (line), each image row has a plurality of pixels, the pixel definition of the same position of each image row is an image row (column), this method comprises the following steps: that mainly (A) is to an image that inputs to this image coder, according to the image row of a special ratios with the left side and the right of this image, reduced image row every the N row, to reduce the data quantity of this image; (B) image of this data quantity reduction is delivered to this image coder coding and storage; (C) image after will encoding transfers to this image-decoding device via this transmission channel; (D) image behind this image-decoding device coding that will receive is decoded; And the image row that (E) quilt in this decoded image reduced are mended point processing.
For reaching another above-mentioned purpose, in the method that is applied to image reservoir system data degeneracy proposed by the invention, be that the data of desiring to carry out the image compression/de-compression is carried out degeneracy, this system comprises an image coder and an image-decoding device, this image coder is in order to be sent to this image-decoding device with seeing through a transmission channel after the image coding of input, to decode and output by this image-decoding device, this input image comprises plural image capable (Line), each image is capable to have a plurality of pixels, this method comprises the following steps: that mainly (A) is to an image that inputs to this image coder, according to a special ratios that the top of this image and following image is capable, capable to be reduced an image capable every N, to reduce the data quantity of this image; (B) image of this data quantity reduction is delivered to this image coder coding and storage; (C) image after will encoding transfers to this image-decoding device via this transmission channel; (D) image behind this image-decoding device coding that will receive is decoded; And the capable point processing of mending of image that (E) quilt in this decoded image is reduced.
Description of drawings
Fig. 1 is the Organization Chart of the application system of image reservoir system data degeneracy of the present invention;
Fig. 2 is the flow chart of an embodiment of image reservoir system data degeneracy method of the present invention;
Fig. 3 (A)-(C) is an example that carries out image reservoir system data degeneracy with this method;
Fig. 4 is the flow chart of another embodiment of this image reservoir system data degeneracy method;
Fig. 5 (A)-(C) is another example that carries out image reservoir system data degeneracy with this method.
Embodiment
Please be earlier with reference to the image reservoir system Organization Chart of enforcement shown in Figure 1 method of the present invention, this system comprises an image coder 10 and an image-decoding device 30, this image coder 10 sees through a transmission channel 20 in order to the image 40 coding backs with input and is sent to this image-decoding device 30, to decode and output by this image-decoding device 30, this input image 40 comprises plural image capable (line), each image is capable to have a plurality of pixels 41, and the pixel definition of the same position of each image row is an image row (column).
Fig. 2 is the flow chart that is applied to the method for image reservoir system data degeneracy of the present invention, in step S201, to the image 40 that inputs to this image coder 10, according to the image row of a special ratios with the left side and the right of this image 40, reduced image row every the N row, to reduce the data quantity of this image, this is with sight and concentrate on the middle body of image based on people custom, image quality sensitivity for the peripheral part of this image 40 is relatively poor, so the left side of this image 40 and the partial image row on the right are reduced, the general columns of being deleted is about 20% of these image 40 total columns, the visually uncomfortable sensation of people can't be caused, and the data quantity of this image can be reduced.
Fig. 3 (A) shows the image row on the left side of this image 40 and the right, is reduced image row every 2 row, and obtain just like the less image of data quantity shown in Fig. 3 B.
In step S202, the image of this data quantity reduction is delivered to this image coder 10 codings and storage, this image coder 10 can be existing MPEG1, MPEG2 or image coder H.263.
In step S203, the image behind this coding is transferred to this image-decoding device 30 via this transmission channel 20, in step S204, the image behind the coding that this image-decoding device 30 will receive is decoded.
In step S205, to being mended point processing by the image that reduced row in this decoded image, this benefits point processing be duplicate respectively the value of the related pixel of desiring to mend previous column a little, respectively duplicate the value of desiring to mend back one related pixel that is listed as a little or be respectively the previous column desiring to mend a little and after the mean value of a related pixel that is listed as.The pixel value that this benefit point processing also can use an interpolation (interpolation) method to be listed as with the image that calculates this reduction.This benefit point processing also can use a finite impulse response filter (finite impulse response, FIR) pixel value that is listed as with the image that calculates this reduction.
Fig. 3 (C) is the result who the image row that reduced in this decoded image is mended point processing, this benefit point processing is the value of duplicating the related pixel of the previous column of desiring to mend point respectively, because the image that is reduced row are the marginal portions at whole image frame, and through the simple point processing of mending, therefore, visual influence can be do not caused, but the effect of data reduction can be effectively reached.
Aforesaid embodiment is that to be listed as to carry out the data degeneracy be the example explanation to the image with the reduction left side of image frame and the right, but method of the present invention can also be reduced the top and the following capable data degeneracy that carries out of image of image frame, its flow process as shown in Figure 4, Fig. 5 (A) then shows the image of the top of image 40 and bottom capable, it is capable to be reduced an image every 2 row, and obtain just like the less image of data quantity shown in Fig. 5 (B), Fig. 5 (C) is the capable result who mends point processing of image who is reduced in this decoded image, the method step of this embodiment is all suitable with last embodiment, so repeated description no longer.
As shown in the above description, in the method that is applied to image reservoir system data degeneracy of the present invention, give the data degeneracy earlier owing to be about to desire to input to the image of image coder earlier, and can cooperate the specification of existing DRAM standardized product, need not use more jumbo DRAM, saving hardware cost, and the image that is reduced capable be marginal portion at whole image frame, and through simple benefit point processing, and can not cause visual harmful effect.
Claims (20)
1. method that is applied to image reservoir system data degeneracy, system comprises an image coder and an image-decoding device, this image coder is in order to be sent to this image-decoding device with seeing through a transmission channel after the image coding of input, to decode and output by this image-decoding device, this input image comprises that plural image is capable, and each image is capable to have a plurality of pixels, and the pixel definition of the same position that each image is capable is an image row, it is characterized in that this method mainly comprises the following steps:
(A),, reduced image row every the N row, to reduce the data quantity of this image according to the image row of a special ratios with the left side and the right of this image to an image that inputs to this image coder;
(B) image of this data quantity reduction is delivered to this image coder coding and storage;
(C) image after will encoding transfers to this image-decoding device via this transmission channel;
(D) image behind this image-decoding device coding that will receive is decoded; And
(E) the image row that reduced in this decoded image are mended point processing.
2. the method for claim 1 is characterized in that, in step (A), this N value is 2.
3. method as claimed in claim 2 is characterized in that, in step (A), the image that is reduced is classified odd column or even column as.
4. the method for claim 1 is characterized in that, in step (A), is less than or equal to 20% of the total columns of this image according to the image columns that this special ratios reduced.
5. method as claimed in claim 4 is characterized in that, can be 10% of the total columns of this image according to the image columns that this special ratios reduced in step (A).
6. the method for claim 1 is characterized in that, in step (E), this benefit point processing is the value of duplicating the related pixel of desiring to mend previous column a little respectively.
7. the method for claim 1 is characterized in that, in step (E), this benefit point processing is the value of duplicating the related pixel of desiring to mend back row a little respectively.
8. the method for claim 1 is characterized in that, in step (E), this benefit point processing is the mean value that is respectively the related pixel of the previous column desiring to mend a little and back one row.
9. the method for claim 1 is characterized in that, in step (E), and the pixel value that this benefit point processing is to use an interpolation method to be listed as with the image that calculates this reduction.
10. the method for claim 1 is characterized in that, in step (D), and the pixel value that this benefit point processing is to use a finite impulse response filter to be listed as with the image that calculates this reduction.
11. method that is applied to image reservoir system data degeneracy, this system comprises an image coder and an image-decoding device, this image coder is in order to be sent to this image-decoding device with seeing through a transmission channel after the image coding of input, to decode and output by this image-decoding device, this input image comprises that plural image is capable, each image is capable to have a plurality of pixels, it is characterized in that this method mainly comprises the following steps:
(A) to an image that inputs to this image coder, according to a special ratios that the top of this image and following image is capable, capable to be reduced an image capable every N, to reduce the data quantity of this image;
(B) image of this data quantity reduction is delivered to this image coder coding and storage;
(C) image after will encoding transfers to this image-decoding device via this transmission channel;
(D) image behind this image-decoding device coding that will receive is decoded; And,
(E) the capable point processing of mending of image to being reduced in this decoded image.
12. method as claimed in claim 11 is characterized in that, in step (A), this N value is 2.
13. method as claimed in claim 12 is characterized in that, in step (A), and the image behavior odd-numbered line or the even number line of being reduced.
14. method as claimed in claim 11 is characterized in that, in step (A), is less than or equal to 20% of the total line number of this image according to the image line number that this special ratios reduced.
15. method as claimed in claim 14 is characterized in that, can be 10% of the total line number of this image according to the image line number that this special ratios reduced in step (A).
16. method as claimed in claim 11 is characterized in that, in step (E), this benefit point processing is the value of duplicating the related pixel of desiring to mend lastrow a little respectively.
17. method as claimed in claim 11 is characterized in that, in step (E), this benefit point processing is the value of duplicating the related pixel of desiring to mend next line a little respectively.
18. method as claimed in claim 11 is characterized in that, in step (E), this benefit point processing is the mean value that is respectively the related pixel of the lastrow desiring to mend a little and next line.
19. method as claimed in claim 11 is characterized in that, in step (E), this benefit point processing is to use the image capable pixel value of an interpolation method to calculate this reduction.
20. method as claimed in claim 11 is characterized in that, in step (E), this benefit point processing is to use the image capable pixel value of a finite impulse response filter to calculate this reduction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101165639A CN1305314C (en) | 2003-11-20 | 2003-11-20 | Method of date degeneration for image storage system |
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| CNB2003101165639A CN1305314C (en) | 2003-11-20 | 2003-11-20 | Method of date degeneration for image storage system |
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| CN1305314C true CN1305314C (en) | 2007-03-14 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5390674A (en) * | 1993-12-30 | 1995-02-21 | Advanced Technology Laboratories, Inc. | Ultrasonic imaging system with interpolated scan lines |
| US6133956A (en) * | 1996-04-11 | 2000-10-17 | Sony Corporation | Dual standard video signals processor |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5390674A (en) * | 1993-12-30 | 1995-02-21 | Advanced Technology Laboratories, Inc. | Ultrasonic imaging system with interpolated scan lines |
| US6133956A (en) * | 1996-04-11 | 2000-10-17 | Sony Corporation | Dual standard video signals processor |
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