CN101237582A - Local dynamic image amplification device and method and image processing system - Google Patents
Local dynamic image amplification device and method and image processing system Download PDFInfo
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Abstract
The invention discloses an image local dynamic amplifying device, an amplifying method and an image processing system. The device comprises a coding unit, a frame buffer unit, a microcontrol unit, a decoding unit, a zoom unit and a display interface, wherein the coding unit completes segment compression of an input frame image; the frame buffer unit stores the compressed data of each segment of the frame image; the microcontrol unit selects a local region in the frame image; the decoding unit carries out decompression of the compressed data of each segment containing the selected local region in the frame buffer unit; the zoom unit selects the decompression data of the selected local region from the decompression data of each segment containing the selected local region, and amplifies the decompression data; the display interface outputs the amplified decompression data of the selected local region so as to display the decompression data. Thus, decoding of the image coding data of the relevant part of the local region interesting to a user can be directly carried out, thereby increasing efficiency and reducing power consumption.
Description
[technical field]
The present invention relates to image processing field, relate in particular to local dynamic image amplification device, method and image processing system.
[background technology]
Video monitoring system has obtained using widely at present, such as the real-time monitoring system in the building, the real-time monitoring system in the biotope etc.Described supervisory control system generally all comprises imageing sensor, coding unit, frame buffer unit, decoding unit and display unit.Described imageing sensor acquisition frame view data, coding unit is encoded to the frame image data of imageing sensor collection and is compressed in other words, with the frame image data behind the coding is that unit buffers into the frame buffer unit with the frame, decoding unit obtains the frame image data in the frame buffer unit and it is decoded in other words decompress, display unit shows decoded frame image data, has so just finished the whole process that shows from the IMAQ to the image.
Many times, the user may be only interested in the regional area of whole two field picture, such as key monitoring zones such as doorways, and wishes and can amplify demonstration to interested regional area.At this moment, described supervisory control system need be introduced unit for scaling, and described unit for scaling can be selected in the whole two field picture user's interest regional area and this regional area is suitably amplified, and display unit just can show the image local zone after the amplification like this.As a rule, the size of display unit generally is fit to show a whole two field picture that does not amplify, and after amplified in the image local zone, described display unit just can not show a whole two field picture, can only show the image local zone after the amplification, the remaining image zone can not show.Yet this moment, the decoding unit in the supervisory control system was but still decoded to whole two field picture, and the frame image data that decoding is come out has only regional area to be effectively used, and caused like this that system effectiveness is not high, power consumption is bigger than normal.
[summary of the invention]
One of purpose of the present invention is to provide a kind of local dynamic image amplification device and method, and it can directly be decoded to the relevant portion image coded data of user's interest regional area, has improved efficient like this, has reduced power consumption.
Two of purpose of the present invention is to provide a kind of image processing system, and it can directly be decoded to the relevant portion image coded data of user's interest regional area, has improved efficient like this, has reduced power consumption.
According to an aspect of the present invention, the invention provides a kind of local dynamic image amplification device, it comprises: coding unit is used for the incoming frame image is carried out the segmentation compression; The frame buffer unit is used for each section packed data of caching frame image; Micro-control unit is used at the selected regional area of two field picture; Decoding unit is used for that the frame buffer unit is comprised each section packed data of selecting regional area and decompresses; Unit for scaling is used for choosing the decompressed data of described selected regional area and it being amplified from each section decompressed data that comprises described selected regional area; And display interface, the decompressed data that is used to export the selected regional area after the amplification is to show.
Further, described coding unit also adds interval flag between each section packed data, and described frame buffer unit caches has the two field picture packed data of interval flag.
Further, it also includes position storage unit, is used to store the stored position information of each section packed data.
Further again, described coding unit is after compressing each segment data in the incoming frame image, this section packed data is buffered in the frame buffer unit, afterwards, described coding unit is exported an interval flag to the frame buffer unit, described interval flag sequential storage is behind this section packed data, when the first byte packed data of coding unit output frame image or during the first byte packed data after exporting each interval flag, location of instruction memory module stores the memory address of current images packed data in the frame buffer unit and is used as the stored position information that tool is counted in each section compression down simultaneously.
Further, described coding unit is the JPEG coding unit, and described decoding unit is the JPEG decoding unit.
Further, after in two field picture, selecting regional area, need calculate each section packed data that comprises selected regional area, and find out the stored position information of each section packed data that comprises selected regional area by position storage unit, stored position information according to each section packed data that comprises selected regional area, read each section packed data that comprises selected regional area from the frame buffer unit, decoding unit just decompresses to each section packed data that comprises selected regional area in the frame buffer unit.
According to a further aspect in the invention, the invention provides a kind of image local dynamic amplification method, it comprises: the incoming frame view data; Frame image data is carried out segmentation independence JPEG compression, and add interval flag between each section packed data, the two field picture packed data that will have interval flag buffers into the frame buffer unit, deposits the stored position information of each section packed data in position storage unit; The regional area of selected frame image; Calculate each section packed data that comprises selected regional area, and find out the stored position information of each section packed data that comprises selected regional area by position storage unit; According to the stored position information of each section packed data that comprises selected regional area, read each section packed data that comprises selected regional area from the frame buffer unit and it is carried out jpeg decompression contract; From each section decompressed data that comprises described selected regional area, choose the decompressed data of described selected regional area and it is amplified; And the decompressed data of the selected regional area after will amplifying shows.
Further, frame image data is carried out segmentation independence JPEG compression, and between each section packed data, add interval flag, the two field picture packed data that will have interval flag buffers into the frame buffer unit, the step that the positional information of each section packed data is deposited in position storage unit comprises: after each segment data in the incoming frame image is carried out the JPEG compression, this section packed data is buffered in the frame buffer unit; Export an interval flag to the frame buffer unit, described interval flag sequential storage is behind this section packed data; To the first byte packed data of frame buffer unit output frame image the time or during the first byte packed data after exporting each interval flag, location of instruction memory module stores the stored position information that is used as each section packed data down with the memory address of current images packed data in the frame buffer unit.
In accordance with a further aspect of the present invention, the invention provides a kind of image processing system, coding unit is used for the incoming frame image is carried out segmentation JPEG compression; The frame buffer unit is used for each section packed data of caching frame image; Micro-control unit is used at the selected regional area of two field picture; Decoding unit is used for that each section packed data that the frame buffer unit comprises selected regional area is carried out jpeg decompression and contracts.
Further, described coding unit also adds interval flag between each section packed data, and described frame buffer unit caches has the two field picture packed data of interval flag.
Further, it also includes position storage unit, is used to store the stored position information of each section packed data.
Further again, described coding unit is after compressing each segment data in the incoming frame image, this section packed data is buffered in the frame buffer unit, afterwards, described coding unit is exported an interval flag to the frame buffer unit, described interval flag sequential storage is behind this section packed data, when the first byte packed data of coding unit output frame image or during the first byte packed data after exporting each interval flag, location of instruction memory module stores the memory address of current images packed data in the frame buffer unit and is used as the stored position information that tool is counted in each section compression down simultaneously.
Further again, after in two field picture, selecting regional area, need calculate each section packed data that comprises selected regional area, and find out the stored position information of each section packed data that comprises selected regional area by position storage unit, stored position information according to each section packed data that comprises selected regional area, read each section packed data that comprises selected regional area from the frame buffer unit, decoding unit just decompresses to each section packed data that comprises selected regional area in the frame buffer unit.
Technical solution of the present invention is compared with existing scheme, when frame image data being carried out the JPEG compression, produce picture position information synchronously, and be stored in the described position storage unit, when the user need watch interested regional area image, described frame buffer unit can be according to picture position information, only send the compressing image data image-related with the user's interest regional area, decompress for the JPEG decoding unit, after the decompression through the suitable amplification of unit for scaling, the enlarged image that finally on display terminals such as TV, shows interested regional area by display interface, the scheme of this dynamic amplification has improved real-time demonstration response speed, improve system effectiveness, reduced system power dissipation.
[description of drawings]
Fig. 1 is the block diagram of an embodiment of local dynamic image amplification device of the present invention;
Fig. 2 is the position storage unit in the local dynamic image amplification device of the present invention and the structure function exemplary plot of frame buffer unit;
Fig. 3 is the local dynamically amplifieroperation schematic flow sheet of local dynamic image amplification device of the present invention; And
Fig. 4 is the schematic flow sheet of an embodiment of image local dynamic amplification method of the present invention.
[embodiment]
Below in conjunction with accompanying drawing the specific embodiment of the invention is described.
The present invention proposes a kind of local dynamic image amplification device 100, Fig. 1 is the structural representation of an embodiment of local dynamic image amplification device of the present invention.As shown in Figure 1, described local dynamic image amplification device 100 includes image input interface 102, JPEG (Joint Photographic ExpertsGroup, JPEG (joint photographic experts group)) coding unit 104, frame buffer unit 110, JPEG decoding unit 112, unit for scaling 114, micro-control unit (Micro Controller Unit is called for short MCU) 116 and display interface 118.Wherein, by described image input interface 102 incoming frame view data, 104 pairs of described frame image datas of described JPEG coding unit compress coding in other words, and the frame image data after will compressing buffers into frame buffer unit 110, frame image data after the compression in 112 pairs of frame buffer unit of described JPEG decoding unit 100 decompresses and decodes in other words, frame image data after 114 pairs of decompressions of described unit for scaling carries out adjusted size, such as amplification, dwindle etc., the frame image data of process adjusted size is delivered on the display terminal by described display interface 118 and shows.Described micro-control unit 116 is used for each module is controlled.
It should be noted that, local dynamic image amplification device 100 among the present invention also includes described position storage unit 108, by the introducing of described position storage unit 108 and the improvement of corresponding mechanism, make local dynamic image amplification device 100 of the present invention only can realize the relevant portion compressing image data of user's interest regional area is decompressed, improved efficient like this, reduced power consumption.Just describe realization principle of the present invention below in detail.
Generally speaking be exactly when frame image data being carried out the JPEG compression, to produce picture position information synchronously, and be stored in the described position storage unit 108.When the user need watch interested regional area image, described frame buffer unit 1110 can be according to picture position information, only send the compressing image data image-related with the user's interest regional area, decompress for JPEG decoding unit 112, through the suitable amplification of unit for scaling 114, finally on display terminals such as TV, show the enlarged image of interested regional area after the decompression by display interface 118.This dynamically by the suitable control of 116 pairs of frame buffer unit 110 of micro-control unit, JPEG decoding unit 112 and unit for scaling, can realize the dynamic change of interested regional area.
In Joint Photographic Experts Group, can in the two field picture coded data, add interval flag, one section packed data after each interval flag all is a recompile, that is to say, being spaced apart the isolated every section packed data of sign all is absolute coding, this means that every section packed data can independently be decoded.Corresponding, in Joint Photographic Experts Group, if do not add interval flag in the two field picture packed data, this moment, whole two field picture was exactly to encode together, this means, any a part of data in the whole frame image data all can not be by independent decoding.The present invention has utilized these characteristics of Joint Photographic Experts Group just, by in a two field picture packed data, adding several interval flag, just every two field picture packed data can be divided into the packed data of plurality of sections absolute coding, and write down the stored position information of the packed data of each section absolute coding.
Specifically, described JPEG coding unit 104 is after compressing the one piece of data in the two field picture, this section packed data is buffered in the frame buffer unit 110, subsequently, described JPEG coding unit 104 outputs one interval flag is to frame buffer unit 110, and described interval flag sequential storage is behind this section packed data.Next, described JPEG coding unit 104 is after compressing the following one piece of data in the two field picture, this section packed data is buffered in the frame buffer unit 110, subsequently, described JPEG coding unit 104 next interval flag of output are to frame buffer unit 110, and are described after flag sequence is stored in this section packed data.Repeat aforesaid operations, described JPEG coding unit 104 just can buffer in the frame buffer unit 110 after putting in order the two field picture coding, simultaneously several interval flag is added in the two field picture packed data.When the first byte packed data of the whole two field picture of JPEG coding unit 104 output or during the first byte packed data after exporting each interval flag, export a jump signal-arm simultaneously and give slot storage module 108, store with the memory address of location of instruction memory module 108, and write down the serial number of this memory address the 110 li current images packed datas in frame buffer unit.In the packed data of whole like this two field picture, the memory address of first byte image data of the starting point of image and each interval flag back just all is stored in 108 li of position storage unit.
Described interval flag add that the implantation site can be provided with as required but because JPEG coding unit 104 is to be minimum treat unit with macro block (block of pixels of 8*8,8*16 or 16*16), therefore interval flag will add after the block of pixels of the integral multiple of minimum macro block, such as minimum macro block is the block of pixels of 8*8, and the block of pixels of 8*32,8*480,16*480 or 32*480 is exactly the block of pixels of its integral multiple so.For example, in one embodiment, two field picture is that VGA (640 * 480) size, picture format are YUV 422, each macro block (macro block) comprises two Y pieces (8 * 8pixels), a U piece and a V piece (block of pixels that is equivalent to 8*16), in the image of so per 8 row 40 macro blocks are just arranged, if it is 40 that the number that every segment data comprises macro block is set, need will insert an interval flag in the ending of per 8 packed datas of going so, and at this moment position storage unit will be stored 60 addresses for 108 li.Fig. 2 has shown the concrete structure of position storage unit and frame buffer unit in this example, and address date wherein is tentation data, and FFD0, FFD7 be interval flag.
Please referring to shown in Figure 3, it is the local dynamically amplifieroperation schematic flow sheet of local dynamic image amplification device 100 of the present invention.Below just the local dynamically amplifieroperation flow process of local dynamic image amplification device 100 of the present invention is specifically described in conjunction with Fig. 3.
The positional information that step 304, micro-control unit 116 will be selected regional area flows to frame buffer unit 110 and unit for scaling 114.
Certainly, in other embodiment, in step 304, micro-control unit 116 can not flow to frame buffer unit 110 with the positional information of selecting regional area, and in step 306, frame buffer unit 110 also can not be used for going out to comprise according to the positional information calculation of the selected regional area received the hop count of each section packed data of described selected regional area, but direct according to the hop count that goes out to comprise each section packed data of described selected regional area according to the positional information calculation of selecting regional area by micro-control unit 116, and the hop count of each section packed data of the described selected regional area that will calculate is informed frame buffer unit 110.
By on-the-fly modifying of 116 pairs of frame buffer unit 110 of micro-control unit, JPEG decoding unit and 114 li corresponding registers of unit for scaling, can accomplish the dynamic change of area-of-interest.
In addition, technical scheme of the present invention can also be embodied as a kind of image local dynamic amplification method, and Fig. 4 shows the schematic flow sheet of an embodiment of image local dynamic amplification method of the present invention.As shown in Figure 4, described image local dynamic amplification method may further comprise the steps.
Be understandable that, for those of ordinary skills, can be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, and all these changes or replacement all should belong to the protection range of the appended claim of the present invention.
Claims (13)
1, a kind of local dynamic image amplification device is characterized in that, it comprises:
Coding unit is used for the incoming frame image is carried out the segmentation compression;
The frame buffer unit is used for each section packed data of caching frame image;
Micro-control unit is used at the selected regional area of two field picture;
Decoding unit is used for that the frame buffer unit is comprised each section packed data of selecting regional area and decompresses;
Unit for scaling is used for choosing the decompressed data of described selected regional area and it being amplified from each section decompressed data that comprises described selected regional area; And
Display interface, the decompressed data that is used to export the selected regional area after the amplification is to show.
2, local dynamic image amplification device as claimed in claim 1 is characterized in that: described coding unit also adds interval flag between each section packed data, and described frame buffer unit caches has the two field picture packed data of interval flag.
3, local dynamic image amplification device as claimed in claim 2 is characterized in that: it also includes position storage unit, is used to store the stored position information of each section packed data.
4, local dynamic image amplification device as claimed in claim 3, it is characterized in that: described coding unit is after compressing each segment data in the incoming frame image, this section packed data is buffered in the frame buffer unit, afterwards, described coding unit is exported an interval flag to the frame buffer unit, described interval flag sequential storage is behind this section packed data, when the first byte packed data of coding unit output frame image or during the first byte packed data after exporting each interval flag, location of instruction memory module stores the memory address of current images packed data in the frame buffer unit and is used as the stored position information that tool is counted in each section compression down simultaneously.
5, local dynamic image amplification device as claimed in claim 1 is characterized in that: described coding unit is the JPEG coding unit, and described decoding unit is the JPEG decoding unit.
6, local dynamic image amplification device as claimed in claim 3, it is characterized in that: after in two field picture, selecting regional area, need calculate each section packed data that comprises selected regional area, and find out the stored position information of each section packed data that comprises selected regional area by position storage unit, stored position information according to each section packed data that comprises selected regional area, read each section packed data that comprises selected regional area from the frame buffer unit, decoding unit just decompresses to each section packed data that comprises selected regional area in the frame buffer unit.
7, a kind of image local dynamic amplification method is characterized in that it comprises:
The incoming frame view data;
Frame image data is carried out segmentation independence JPEG compression, and add interval flag between each section packed data, the two field picture packed data that will have interval flag buffers into the frame buffer unit, deposits the stored position information of each section packed data in position storage unit;
The regional area of selected frame image;
Calculate each section packed data that comprises selected regional area, and find out the stored position information of each section packed data that comprises selected regional area by position storage unit;
According to the stored position information of each section packed data that comprises selected regional area, comprise each section packed data of selected regional area and it is carried out jpeg decompression contract from the output of frame buffer unit;
From each section decompressed data that comprises described selected regional area, choose the decompressed data of described selected regional area and it is amplified; And
The decompressed data of the selected regional area after amplifying is shown.
8,7 image local dynamic amplification method as claimed in claim, it is characterized in that: frame image data is carried out segmentation independence JPEG compression, and between each section packed data, add interval flag, the two field picture packed data that will have interval flag buffers into the frame buffer unit, and the step that the positional information of each section packed data is deposited in position storage unit comprises:
After each segment data in the incoming frame image carried out JPEG compression, this section packed data is buffered in the frame buffer unit;
Export an interval flag to the frame buffer unit, described interval flag sequential storage is behind this section packed data;
To the first byte packed data of frame buffer unit output frame image the time or during the first byte packed data after exporting each interval flag, location of instruction memory module stores the stored position information that is used as each section packed data down with the memory address of current images packed data in the frame buffer unit.
9, a kind of image processing system is characterized in that, it comprises:
Coding unit is used for the incoming frame image is carried out segmentation JPEG compression;
The frame buffer unit is used for each section packed data of caching frame image;
Micro-control unit is used at the selected regional area of two field picture;
Decoding unit is used for that each section packed data that the frame buffer unit comprises selected regional area is carried out jpeg decompression and contracts.
10,9 image processing system as claimed in claim, it is characterized in that: described coding unit also adds interval flag between each section packed data, and described frame buffer unit caches has the two field picture packed data of interval flag.
11, image processing system as claimed in claim 10 is characterized in that: it also includes position storage unit, is used to store the stored position information of each section packed data.
12, image processing system as claimed in claim 11, it is characterized in that: described coding unit is after compressing each segment data in the incoming frame image, this section packed data is buffered in the frame buffer unit, afterwards, described coding unit is exported an interval flag to the frame buffer unit, described interval flag sequential storage is behind this section packed data, when the first byte packed data of coding unit output frame image or during the first byte packed data after exporting each interval flag, location of instruction memory module stores the memory address of current images packed data in the frame buffer unit and is used as the stored position information that tool is counted in each section compression down simultaneously.
13, image processing system as claimed in claim 11, it is characterized in that: after in two field picture, selecting regional area, need calculate each section packed data that comprises selected regional area, and find out the stored position information of each section packed data that comprises selected regional area by position storage unit, stored position information according to each section packed data that comprises selected regional area, read each section packed data that comprises selected regional area from the frame buffer unit, decoding unit just decompresses to each section packed data that comprises selected regional area in the frame buffer unit.
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