CN112905277A - Intelligent display terminal large image loading method - Google Patents
Intelligent display terminal large image loading method Download PDFInfo
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- CN112905277A CN112905277A CN202110094361.7A CN202110094361A CN112905277A CN 112905277 A CN112905277 A CN 112905277A CN 202110094361 A CN202110094361 A CN 202110094361A CN 112905277 A CN112905277 A CN 112905277A
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- 238000011068 loading method Methods 0.000 title claims abstract description 17
- 238000005070 sampling Methods 0.000 claims abstract description 20
- 230000000903 blocking effect Effects 0.000 claims abstract description 6
- 238000000638 solvent extraction Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- 230000008859 change Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/451—Execution arrangements for user interfaces
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/95—Retrieval from the web
- G06F16/957—Browsing optimisation, e.g. caching or content distillation
- G06F16/9574—Browsing optimisation, e.g. caching or content distillation of access to content, e.g. by caching
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0484—Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
- G06F3/04845—Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range for image manipulation, e.g. dragging, rotation, expansion or change of colour
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
- G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T3/00—Geometric image transformations in the plane of the image
- G06T3/40—Scaling of whole images or parts thereof, e.g. expanding or contracting
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- Controls And Circuits For Display Device (AREA)
- User Interface Of Digital Computer (AREA)
Abstract
The invention discloses a large image loading method for an intelligent display terminal, which comprises the following steps: a. picture blocking processing: calculating a sampling rate and partitioning the picture according to the sampling rate, wherein the sampling rate is calculated according to the zoom rate of a screen display picture, and after the sampling rate is determined, the picture is divided into a plurality of regional picture blocks; b. and displaying the region blocks: and when the clear images are acquired, drawing the base images on the screen one by one according to the designated area to cover the base images. The invention has the advantages of small memory consumption, high loading speed and capability of avoiding software crash and simultaneously seeing the picture details clearly.
Description
Technical Field
The invention relates to the technical field of image data processing, in particular to a large image loading method for an intelligent display terminal.
Background
Because the memory of the intelligent display terminal is small, when a picture with a screen resolution being dozens of times is loaded, oom (out of memory overload) abnormality is caused by loading the picture into the memory at one time, and software is crashed. The thumbnails loaded according to the prior art may interfere with the user's view and obscure the detailed portion.
Disclosure of Invention
The invention aims to overcome the defects in the background art and provides a large-image loading method for an intelligent display terminal, which is used for solving the technical problems of software crash and poor watching effect of a user caused by large memory consumption.
In order to achieve the purpose, the invention adopts the technical scheme that:
a big picture loading method of an intelligent display terminal comprises the following steps:
a. picture blocking processing: calculating a sampling rate and partitioning the picture according to the sampling rate, wherein the sampling rate is calculated according to the zoom rate of a screen display picture, and after the sampling rate is determined, the picture is divided into a plurality of regional picture blocks;
b. and displaying the region blocks: and when the clear images are acquired, drawing the base images on the screen one by one according to the designated area to cover the base images.
The invention has the following beneficial effects: the invention loads the pictures in blocks, draws the base map and the clear map in layers, and the base map is only a thumbnail, so the invention has the advantages of small memory consumption, no memory overload, software crash prevention, high loading speed and clear picture details.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention.
FIG. 1 is a flow chart of an embodiment of the present invention.
Detailed Description
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention.
As shown in fig. 1, a method for loading a large diagram of an intelligent display terminal includes the following steps:
a. picture blocking processing: calculating a sampling rate and partitioning the picture according to the sampling rate, wherein the sampling rate is calculated according to the zoom rate of a screen display picture, and after the sampling rate is determined, the picture is divided into a plurality of regional picture blocks;
b. and displaying the region blocks: when the images need to be displayed, corresponding area image blocks are loaded for drawing, the drawing comprises base image drawing and clear image drawing, the base image is a thumbnail, the base image is drawn in a designated area of a screen after being amplified or reduced according to a zoom ratio, when the clearer images are not loaded, a user can see the blurred images, the phenomena of screen blackness and partial blank do not occur, and the clear images are drawn on the screen one by one according to the designated area after being acquired, and the base image is covered.
In an embodiment of the present invention, the base map is determined as follows:
when loading for the first time, in order to make the picture display completely, the scaling rate with smaller height-width scaling ratio is needed, so the scaling ratio Scale =of the height and width is calculated according to the current screen size and picture size
Wherein bh is the picture height, bw is the picture width, h is the screen height, and w is the screen width;
and caching the picture processed according to the scaling into a memory as a bottom map drawn later.
In the embodiment of the present invention, when a picture is blocked, since the picture after blocking needs to be cached, the height and width of the picture displayed on the screen change after rotation, and if the picture needs to be multiplexed, the height and width after blocking content is rotated need to be unchanged. So the picture is square-partitioned, and the squares are equal in height and width after rotation.
The height of the screen is h, the width of the screen is w, the minimum value of the height and the width is taken as the side of a square, and the calculation formula of the square block area is as follows:
in the embodiment of the invention, the acquired block images are cached in groups according to the sampling rate, and different sampling rates correspond to different definitions, so that the pictures with the same definition and the same block area can be conveniently multiplexed.
In the embodiment of the invention, the method further comprises the following steps of:
when the current operation is judged to be amplification, reduction, rotation and movement through gestures, the base image is zoomed and moved and displayed on a screen, meanwhile, a region corresponding to a picture on the screen is obtained, the region is partitioned, then, a corresponding partitioned picture is obtained in a cache, if the cached partitioned picture exists, the cached partitioned picture is obtained and directly drawn to the corresponding region of the screen, and if the cached picture does not exist, a corresponding picture block is obtained according to the partitioned region by adopting a partitioned decoding method.
The translation is that one touch point moves on the screen, the zooming is that two touch points move on the screen, the distance between the two touch points is constantly changed, the rotation is that the two touch points move on the screen, the position of the center point of the two touch points is unchanged, and the distance is unchanged.
In the embodiment of the invention, when the picture is not rotated, the corresponding picture area on the screen does not need to be converted, and if the picture is rotated, the position and the direction of picture display need to be determined again through matrix conversion.
The picture rotation processing is that when the picture is rotated, the direction of the obtained picture is different from the direction which is actually required to be displayed, and at this time, the display position of the picture and the direction of the picture need to be changed, so that the picture displayed on the screen is ensured to be matched with the gesture operated by the user on the screen. Firstly, the left, upper, right, lower coordinate values of the area to be converted are left, top, right and bottom, the picture height is height, and the picture width is width. When the rotation angle is 90 degrees, the conversion formula is as follows:
when the rotation angle is 180 degrees, the rotation formula is as follows:
when the rotation angle is 270 degrees, the conversion formula is as follows:
the embodiment of the invention is suitable for intelligent display terminals, such as products of intelligent mobile phones, intelligent televisions and the like. The products have small memory, and the invention can not only realize the loading of the pictures in blocks and reduce the memory consumption, but also load the content along with the change of gestures, cache and release the content and reduce the consumption of the processor, thereby realizing a big picture loading method with quick response, low memory consumption and low processor consumption and bringing good picture viewing and interactive experience to users.
The embodiments given above are only examples and detailed descriptions of the technical solutions of the present invention, and it should not be understood that the present invention is limited to the described embodiments. Changes, modifications and variations of the technical solution of the present invention may be made without departing from the principle and concept of the invention, and the technical solution of the present invention may fall within the protection scope of the present invention.
Claims (6)
1. A big picture loading method of an intelligent display terminal is characterized by comprising the following steps:
a. picture blocking processing: calculating a sampling rate and partitioning the picture according to the sampling rate, wherein the sampling rate is calculated according to the zoom rate of a screen display picture, and after the sampling rate is determined, the picture is divided into a plurality of regional picture blocks;
b. and displaying the region blocks: and when the clear images are acquired, drawing the base images on the screen one by one according to the designated area to cover the base images.
2. The method for loading the big picture of the intelligent display terminal according to claim 1, wherein the base picture is determined as follows:
when loading for the first time, calculating the scaling Scale =of height and width according to the current screen size and picture size
Wherein bh is the picture height, bw is the picture width, h is the screen height, and w is the screen width;
and caching the picture processed according to the scaling into a memory as a bottom map drawn later.
3. The method as claimed in claim 1, wherein the region blocks are squares.
4. The method according to claim 3, wherein the obtained block maps are buffered in groups according to sampling rates, and different sampling rates correspond to different resolutions.
5. The intelligent display terminal big picture loading method according to claim 4, further comprising gesture processing:
when the current operation is judged to be amplification, reduction, rotation and movement through gestures, the base image is zoomed and moved and displayed on a screen, meanwhile, a region corresponding to a picture on the screen is obtained, the region is partitioned, then, a corresponding partitioned picture is obtained in a cache, if the cached partitioned picture exists, the cached partitioned picture is obtained and directly drawn to the corresponding region of the screen, and if the cached picture does not exist, a corresponding picture block is obtained according to the partitioned region by adopting a partitioned decoding method.
6. The method according to claim 5, wherein when there is no rotation, the corresponding picture area on the screen does not need to be converted, and if there is rotation, the position and direction of picture display need to be re-determined by matrix conversion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110094361.7A CN112905277A (en) | 2021-01-25 | 2021-01-25 | Intelligent display terminal large image loading method |
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| CN202110094361.7A CN112905277A (en) | 2021-01-25 | 2021-01-25 | Intelligent display terminal large image loading method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104267940A (en) * | 2014-09-17 | 2015-01-07 | 武汉狮图空间信息技术有限公司 | Quick map tile generation method based on CPU+GPU |
| CN106547624A (en) * | 2016-11-04 | 2017-03-29 | 武汉斗鱼网络科技有限公司 | Picture loading method and device based on Android |
| CN106681667A (en) * | 2017-01-09 | 2017-05-17 | 北京奇虎科技有限公司 | Picture display method and device and mobile terminal |
-
2021
- 2021-01-25 CN CN202110094361.7A patent/CN112905277A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104267940A (en) * | 2014-09-17 | 2015-01-07 | 武汉狮图空间信息技术有限公司 | Quick map tile generation method based on CPU+GPU |
| CN106547624A (en) * | 2016-11-04 | 2017-03-29 | 武汉斗鱼网络科技有限公司 | Picture loading method and device based on Android |
| CN106681667A (en) * | 2017-01-09 | 2017-05-17 | 北京奇虎科技有限公司 | Picture display method and device and mobile terminal |
Non-Patent Citations (3)
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| IFAT: ""缩放加载大图片"", 《HTTPS://WWW.CNBLOGS.COM/XUFENGYUAN/P/6066397.HTML》 * |
| LIWEICAI137: ""利用内存复用，图片分块加载 进行大图片的加载"", 《HTTPS://BLOG.CSDN.NET/LIWEICAI137/ARTICLE/DETAILS/107957011》 * |
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Application publication date: 20210604 |