CN100524452C - Digital image storage, displaying method and device - Google Patents
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Abstract
A method for storing digital image includes obtaining at least one layered image of digital image according to different image resolutions, storing and compression-coding each layered image as well as storing the corresponding relation of each compressed-layered image data storage position information to image resolution. The storage processing device used for realizing said method and method for displaying digital image are also disclosed.
Description
Technical field
The present invention relates to digital image processing techniques, relate in particular to a kind of storage, display packing and device of digital picture.
Background technology
The prerequisite of carrying out Flame Image Process with computing machine is that image must be stored with digital format, and the image of depositing with digital format is referred to as digital picture.The characteristics of digital picture are that data volume is huge, and there is redundant information in view data, so image Compression is essential.Compression of images is divided into lossless compress and lossy compression method, be to utilize the statistical property of picture signal and the physiology and the psychology characteristic of human vision, image is carried out compressed encoding, remove redundant information, purpose is in the prerequisite lower compression data volume that guarantees picture quality, is convenient to the storage and the transmission of image.
For the ease of message exchange and use, image file must be with certain form storage, and the form of image file is that the data of image file constitute form.Each image file all has a file header, is only view data after file header, and file header generally comprises contents such as file type, documenting person, Production Time, version number, file size.Some image file formats commonly used have BMP (bitmap picture, Bit MapPicture) form, TIFF (tagged image file format, Tag Image File Format), JPEG (JPEG (joint photographic experts group), Joint Photographers ' Experts Group) form, GIF (graphics interchange format, Graphics Interchange Format) etc.The BMP file layout is the standard image files form in the Windows system, and compression and two kinds of forms of non-compression are arranged.GIFF is a kind of image file format that relatively is suitable as high-quality preservation original paper, and compression and two kinds of forms of non-compression are arranged, and that compressed format is used is LZW (ring table, Lempel-Ziv ﹠amp; Welch) nondestructive compression type of encryption algorithm.JPEG and GIF are modal two kinds of image file formats in the present network application.JPEG is a kind of lossy compression method file layout, and under the identical image quality requirements, jpeg file has the ratio of compression higher than other image file formats; GIF is a kind of lossless compress file layout of the LZW of support coding, and the GIF function is very abundant, supports staggered scanning to show that the application of GIF on network is more than JPEG.
The demonstration of digital picture is made up of many luminous points on the display device, and these luminous points are called pixel.Resolution is meant the quantity of the pixel that is contained in the unit length, and unit is dpi.Image resolution ratio is meant that the per inch image contains the quantity of pixel, and in digital picture, the size of image resolution ratio directly influences the quality of image; Image resolution ratio is high more, and image detail is clear more, but the document size that produces is big, and the simultaneously treated time is also just long, and is also just high to the requirement of equipment.Screen resolution is meant the quantity of the pixel that per unit length shows on the display device, screen resolution depends on the size and the pixel setting thereof of display device, determine by display card, for example the resolution of the VGA display card of a standard is 640 * 480, is meant 640 pixel units of horizontal direction, 480 pixel units of vertical direction.
Existing image file format is that original Digital Image Data is stored, shown with a fixing image resolution ratio; Perhaps original Digital Image Data is carried out layering, compressed encoding with a fixing image resolution ratio, storage then, procedure for displaying is that decoding is directly exported with described fixing image resolution ratio afterwards, can't select flexibly.
Summary of the invention
The embodiment of the invention provides a kind of storage, display packing and device of image file format, exists image file format to store, to show the problem that can not select flexibly with a fixing image resolution ratio in the prior art in order to solve.
The embodiment of the invention provides a kind of storage means of digital picture, may further comprise the steps:
Obtain at least one layered image of same digital picture according to different image resolution ratios;
Each layered image is carried out compressed encoding respectively, and the compress-layering view data of each layered image of obtaining is stored;
Obtain the stored position information of each compress-layering view data, and store the corresponding relation between the image resolution ratio of the stored position information of each compress-layering view data and this layering.
The embodiment of the invention provides a kind of method that the digital picture of storage is according to the method described above shown simultaneously, may further comprise the steps:
Obtain display resolution, and definite image resolution ratio and the immediate compress-layering image of display resolution are display layer;
Inquire about the stored position information of each compress-layering view data and the corresponding relation between the image resolution ratio, extract the compress-layering view data of described display layer;
Decode the compress-layering view data of described display layer and the display layer image behind the output decoder.
The embodiment of the invention provides a kind of stores processor device of digital picture, comprising:
Image layered module is used for according to different image resolution ratios the same digital picture of input being carried out layering, obtains at least one layered image;
Image compression module is used for each layered image is carried out compressed encoding respectively, obtains the compress-layering view data of each layer correspondence;
First memory module is used to store each compress-layering view data;
The image index module is used to obtain the stored position information of each compress-layering view data, sets up the corresponding relation between the image resolution ratio of the stored position information of each compress-layering view data and this layering;
Second memory module is used to store described corresponding relation.
The embodiment of the invention provides a kind of simultaneously the digital picture of using the said apparatus storage has been carried out device shown, comprising:
The image querying module, be used to obtain display resolution, determine that the immediate layered image of image resolution ratio and display resolution is a display layer, according to the stored position information of each compress-layering view data and the corresponding relation between the image resolution ratio, inquire about the compress-layering image data storage positional information of described display layer;
The image extraction module is used for the compress-layering view data according to the compress-layering image data storage positional information extraction display layer of described display layer;
The image decompression module, the compress-layering view data of the described display layer that is used to decode;
The display buffer unit is used for the buffer memory decoding view data of described display layer afterwards;
Image display is used for according to the decoded data of described display layer the display layer image being shown.
Embodiment of the invention beneficial effect is as follows:
Utilize the embodiment of the invention, by different image resolution ratio layering, compressed encoding, storages, display resolution that can be according to actual needs during demonstration is selected display layer flexibly image file, image file format is shown with different image resolution ratios according to the actual requirements, flexible.
Description of drawings
Fig. 1 is the storing process process flow diagram of digital picture in the embodiment of the invention;
Fig. 2 is the procedure for displaying process flow diagram of digital picture in the embodiment of the invention;
Fig. 3 is the memory storage primary structure synoptic diagram of digital picture in the embodiment of the invention;
Fig. 4 is the display device primary structure synoptic diagram of digital picture in the embodiment of the invention.
Embodiment
Existing digital picture is with fixing image resolution ratio storage, a demonstration, and after image file was determined, image resolution ratio just immobilized; When image resolution ratio is very big, take a large amount of display memories, influence the display speed of image.And the requirement to the image resolution ratio of same digital picture can change in the use of reality, and lower image resolution ratio just can satisfy when the general picture that only need watch image, can improve display speed like this; When needs are observed the details of image, need higher image resolution ratio again, so need a kind of image file that can show with different image resolution ratios according to the actual requirements.When reality was observed display image on display device, human eye was related to the susceptibility of image resolution ratio and the screen resolution of display device, and the resolution of general human eye is close with the screen resolution of display device.If the screen resolution of display device is very low, the high again visual experience to the people of image resolution ratio is also without any raising so.When the very high image of the lower display device resolution of displayed images of screen resolution, human eye can not be felt the high definition of image quality; And, reduce display speed because higher image resolution ratio can take big display memory.Based on this characteristics of human eye, image file is when showing, as long as the approaching image resolution ratio of screen resolution of demonstration and display device just can satisfy the requirement of human eye, can save the display memory that image takies when showing, improves the display speed of image.
Based on above analysis, the embodiment of the invention provides a kind of storage, display packing and device of digital picture, and original Digital Image Data is carried out layering, compressed encoding, storage then according to different image resolution ratios; Can image resolution ratio according to actual needs select the display layer view data during demonstration, flexible.Be explained in detail to the main realization principle of the embodiment of the invention, specific implementation process and to the beneficial effect that should be able to reach below in conjunction with each accompanying drawing.
As shown in Figure 1, the storage means of a kind of digital picture that provides for the embodiment of the invention may further comprise the steps:
S100, obtain the original analog image and convert digital picture to;
To be converted to the receptible digital picture of computing machine to the original analog image, promptly represent just can handle, just can directly carry out S101 if original image is a digital picture with view data.
S101, according to different images resolution to the digital picture layering, generate at least one layered image, described different images resolution is determined according to actual conditions;
The preferable delaminating process to digital picture may further comprise the steps:
The contrast resolution that a, input are determined, described contrast resolution is less than or equal to the original image resolution of digital picture, for example can determine that the minimum value of contrast resolution and display device screen resolution is identical, also can be defined as a definite value according to actual storage or display requirement;
B, with the image resolution ratio of digital picture original resolution as ground floor, select all the other each tomographic image resolution according to the relation of successively decreasing successively, and the image resolution ratio that will firstly be less than or equal to described contrast resolution is as the image resolution ratio of one deck at last;
For example, a concrete implementation process can may further comprise the steps:
As ultimate resolution, the image resolution ratio of ground floor equates with ultimate resolution with the digital picture original resolution;
The image resolution ratio of determining the second layer be ground floor image resolution ratio 1/4, image resolution ratio and contrast resolution with the second layer compare, if the image resolution ratio of the second layer is greater than contrast resolution, the image resolution ratio that is provided with the 3rd layer be the second layer image resolution ratio 1/4, compare with the 3rd layer image resolution ratio and contrast resolution, if the 3rd layer image resolution ratio greater than contrast resolution, is carried out the setting of the 4th layer image resolution ratio;
The rest may be inferred, until selecting the first minimum resolution that is less than or equal to described contrast resolution, determines that minimum resolution is the image resolution ratio of last one deck.
With higher slice is to the successively decrease distribution of image resolution ratio by 1/4 geometric ratio relation, the just embodiment that distributes that successively decreases of 1/4 geometric ratio relation, multiple relation can also be 1/8,1/16,9/16 etc., and the ratio of horizontal direction and vertical direction can be the same or different, and layered mode is versatile and flexible.
Layering to digital picture describes for example, for example the original image resolution of digital picture is 3000 * 2000, the contrast resolution of determining is 400 * 300, the distribution meeting of successively decreasing by 1/4 geometric ratio relation is divided into 4 layers to digital picture, and every layer image resolution ratio is defined as 3000 * 2000,1500 * 1000,750 * 500,375 * 250 successively.
S102, each layered image is carried out compressed encoding respectively, and the compress-layering view data of each layered image of obtaining is stored;
Compaction coding method adopts DCT (discrete cosine transform, Discrete CosineTransform) compression commonly used now or JPEG compression.Layered image data after the compression generate the compress-layering image file.
S103, obtain the stored position information of each compress-layering view data, and store the stored position information of each compress-layering view data and the corresponding relation of image resolution ratio;
Set up the stored position information of each compress-layering view data and the corresponding relation of image resolution ratio, fundamental purpose is the compress-layering view data that can be easy to find this layer according to described corresponding relation under the situation of determining the display layer image resolution ratio.The stored position information of compress-layering view data can be a start position information etc.
As shown in Figure 2, be a kind of method that the digital picture of storage is according to the method described above shown in the embodiment of the invention, may further comprise the steps:
S201, obtain display resolution, and definite image resolution ratio and the immediate compress-layering image of display resolution are display layer;
Display resolution is artificially to determine a fixing resolution according to the display requirement of reality, can determine that also the current screen resolution of display resolution and display device equates, can dynamically obtain the current screen resolution of display device by the calling system function; Illustrate the process of determining display layer, if the display resolution of determining is 800 * 600, the image resolution ratio of each layer compression layered image file is respectively 3000 * 2000,1500 * 1000,750 * 500,375 * 250, with display resolution 800 * 600 near image resolution ratio be 750 * 500, so the display layer of determining is the 3rd layer.
S202, the stored position information of inquiring about each compress-layering view data and the corresponding relation between the image resolution ratio extract the compress-layering view data of display layer according to the stored position information of display layer compress-layering view data;
As determining the 3rd layer among the S201 is display layer, this tomographic image resolution is 750 * 500, just can be according to the stored position information and the image resolution ratio corresponding relation of the compress-layering view data of storing, inquire image resolution ratio and be the stored position information of 750 * 500 compress-layering view data, thereby the compress-layering image data extraction of this layer is come out.
The compress-layering view data of S203, the described display layer of decoding and the display layer image behind the output decoder;
According to the compression coding mode that adopts in the digital picture storage means compress-layering view data of display layer is carried out corresponding decode operation, obtain the display layer view data, decoded display layer view data in the enterprising line output of display device, is obtained digital picture.
The image resolution ratio that the storage to digital picture that provides with the embodiment of the invention, display packing show is approaching with the display resolution of determining, satisfy in the actual displayed process requirement to image resolution ratio, if and the image resolution ratio that requires to show according to actual conditions in procedure for displaying changes to some extent, can definite display layer be changed by changing display resolution, thereby the digital image resolution of exporting on the change display device is convenient, flexible.
When the display resolution of determining equates with the current screen resolution of display device, can dynamically adjust display layer according to display device, when the image resolution ratio of original digital picture during greater than screen resolution, can select image resolution ratio and the immediate display layer of screen resolution to show, under the prerequisite that does not influence the human eye vision effect, save display memory, improve display speed; After the screen resolution of display device changes, image file also can carry out corresponding change to the image resolution ratio that shows, select image resolution ratio and the immediate layered image of screen resolution to show, reach better visual effect, keep the fastest display speed and display memory occupation rate.
See also Fig. 3, the stores processor device for digital picture in the embodiment of the invention comprises,
Image layered module 301 is used for according to different images resolution the digital picture of input being carried out layering, obtains at least one layered image;
Described memory storage further comprises image conversion module 300, be used to obtain corresponding original analog image and convert the digital picture of exporting to image layered module 301 to, be the receptible view data of computing machine, described first memory module 303 and second memory module 305 can merge and be set to same physical location module.
As shown in Figure 4, the digital picture of using above-mentioned memory storage is carried out device shown, comprising for a kind of:
When the display resolution of determining is the screen resolution of display device, described device further comprises screen resolution extraction module 400, be used for the current screen resolution of calling system function dynamic image capturing display module 405, determine that screen resolution is that described display resolution is exported to the image querying module.
Owing to selected image resolution ratio and the immediate display layer of screen resolution to show,, improved display speed so reduced taking of display buffer unit; After the screen resolution of display device changes, image file also can carry out corresponding change to the image resolution ratio that shows, select image resolution ratio and the immediate layered image of screen resolution to show, reach better visual effect, keep the fastest display speed and the best occupation rate of display buffer unit.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (12)
1, a kind of storage means of digital picture is characterized in that, may further comprise the steps:
Obtain at least one layered image of same digital picture according to different image resolution ratios;
Each layered image is carried out compressed encoding respectively, and the compress-layering view data of each layered image of obtaining is stored;
Obtain the stored position information of each compress-layering view data, and store the corresponding relation between the image resolution ratio of the stored position information of each compress-layering view data and this layering.
2, the method for claim 1 is characterized in that, described digital picture is to obtain according to corresponding original analog image transitions.
3, method as claimed in claim 1 or 2, it is characterized in that, the system of selection of described each layered image resolution is: with the original resolution of the described digital picture image resolution ratio as ground floor, select the image resolution ratio of all the other each layers successively according to the relation of successively decreasing, and with the first image resolution ratio that is less than or equal to the image resolution ratio of setting contrast resolution as last one deck, wherein said contrast resolution is less than or equal to the original resolution of digital picture.
4, method as claimed in claim 3 is characterized in that, describedly successively decreases that to close be the equal proportion relation of successively decreasing.
5, method as claimed in claim 3 is characterized in that, the minimum value of described contrast resolution and display device screen resolution is identical or be a fixed resolution.
6, a kind of method that digital picture according to the described method storage of claim 1 is shown is characterized in that, may further comprise the steps:
Obtain display resolution, and definite image resolution ratio and the immediate compress-layering image of display resolution are display layer;
Inquire about the stored position information of each compress-layering view data and the corresponding relation between the image resolution ratio, extract the compress-layering view data of described display layer;
Decode the compress-layering view data of described display layer and the display layer image behind the output decoder.
7, method as claimed in claim 6 is characterized in that, the current screen resolution of described display resolution and display device equates or is a fixed resolution.
8, a kind of stores processor device of digital picture is characterized in that, comprising:
Image layered module is used for according to different image resolution ratios the same digital picture of input being carried out layering, obtains at least one layered image;
Image compression module is used for each layered image is carried out compressed encoding respectively, obtains the compress-layering view data of each layer correspondence;
First memory module is used to store each compress-layering view data;
The image index module is used to obtain the stored position information of each compress-layering view data, sets up the corresponding relation between the image resolution ratio of the stored position information of each compress-layering view data and this layering;
Second memory module is used to store described corresponding relation.
9, device as claimed in claim 8 is characterized in that, described device further comprises image conversion module, exports to described image layered module after being used to obtain the original analog image and described original analog image transitions being become digital picture.
10, install as claimed in claim 8 or 9, it is characterized in that, described first memory module and second memory module merge setting.
11, a kind of digital picture to the described device storage of use claim 8 is carried out device shown, it is characterized in that, comprising:
The image querying module, be used to obtain display resolution, determine that the immediate layered image of image resolution ratio and display resolution is a display layer, according to the stored position information of each compress-layering view data and the corresponding relation between the image resolution ratio, inquire about the compress-layering image data storage positional information of described display layer;
The image extraction module is used for the compress-layering view data according to the compress-layering image data storage positional information extraction display layer of described display layer;
The image decompression module, the compress-layering view data of the described display layer that is used to decode;
The display buffer unit is used for the buffer memory decoding view data of described display layer afterwards;
Image display is used for according to the decoded data of described display layer the display layer image being shown.
12, device as claimed in claim 11, it is characterized in that, when the display resolution of determining is the screen resolution of display device, described device further comprises the screen resolution extraction module, be used to obtain the screen resolution of described image display, and described screen resolution is exported to described image querying module as display resolution.
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| CNB2007100653050A CN100524452C (en) | 2007-04-10 | 2007-04-10 | Digital image storage, displaying method and device |
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Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101630501B (en) * | 2008-07-14 | 2011-11-16 | 比亚迪股份有限公司 | Method and system for displaying image |
| JP5081113B2 (en) | 2008-09-17 | 2012-11-21 | キヤノン株式会社 | Image encoding apparatus, image decoding apparatus, and control method thereof |
| CN101840411B (en) * | 2010-02-09 | 2012-06-06 | 北京瑞风协同科技股份有限公司 | Data demagnification and load display method, device and system |
| CN104461300B (en) * | 2014-12-15 | 2017-12-12 | 宇龙计算机通信科技(深圳)有限公司 | Preview picture method and system |
| CN105489194B (en) * | 2015-11-24 | 2018-09-04 | 小米科技有限责任公司 | A kind of method and apparatus of display image |
| CN105608177A (en) * | 2015-12-18 | 2016-05-25 | 魅族科技（中国）有限公司 | Picture processing method and apparatus |
| CN110019865B (en) * | 2017-09-08 | 2021-01-26 | 北京京东尚科信息技术有限公司 | Mass image processing method and device, electronic equipment and storage medium |
| CN109936752B (en) * | 2017-12-15 | 2021-03-30 | 中国移动通信集团云南有限公司 | Image layering processing method and device |
| AU2019228387B2 (en) * | 2018-02-27 | 2024-07-25 | Zetane Systems Inc. | Scalable transform processing unit for heterogeneous data |
| CN110688510B (en) * | 2018-06-20 | 2022-06-14 | 浙江宇视科技有限公司 | Face background image acquisition method and system |
| CN109686288A (en) * | 2018-12-27 | 2019-04-26 | 大陆汽车车身电子系统（芜湖）有限公司 | A kind of image display method |
| CN111768433B (en) * | 2020-06-30 | 2024-05-24 | 杭州海康威视数字技术股份有限公司 | Method and device for realizing tracking of moving target and electronic equipment |
| CN113613036A (en) * | 2021-06-25 | 2021-11-05 | 海南视联大健康智慧医疗科技有限公司 | Image transmission method, device, equipment and medium |
| CN114007028A (en) * | 2021-10-27 | 2022-02-01 | 四川启睿克科技有限公司 | Point-to-point display system and method on Micro LED projection |
| CN114936966B (en) * | 2022-07-25 | 2022-11-22 | 嘉兴霏云信息科技有限公司 | Method for automatically generating 2.5D map by using 2D map of electronic display screen |
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