WO2022184185A2 - 一种图像快速校准与实时渲染方法、系统、介质及移动端 - Google Patents
一种图像快速校准与实时渲染方法、系统、介质及移动端 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00127—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
- H04N1/00204—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a digital computer or a digital computer system, e.g. an internet server
- H04N1/00244—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a digital computer or a digital computer system, e.g. an internet server with a server, e.g. an internet server
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00127—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
- H04N1/00281—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a telecommunication apparatus, e.g. a switched network of teleprinters for the distribution of text-based information, a selective call terminal
- H04N1/00307—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a telecommunication apparatus, e.g. a switched network of teleprinters for the distribution of text-based information, a selective call terminal with a mobile telephone apparatus
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- the invention belongs to the technical field of geographic information technology and image processing, and in particular relates to a method, system, medium and mobile terminal for fast image calibration and real-time rendering based on a mobile terminal.
- the difficulty is that the front and back data exchange interfaces need to be unified, and the standard data configuration information is determined. , establish standardized service publishing rules, and realize real-time server-side processing.
- the disclosed embodiments of the present invention provide a method, system, medium and mobile terminal for rapid image calibration and real-time rendering. Specifically, it relates to a method for fast image calibration and real-time rendering based on a mobile terminal.
- the purpose of the present invention is to solve the problem of how to overcome the complex and inconvenient problem of image correction, and to solve the problem of rapid rendering and display on the mobile terminal.
- a method for fast image calibration and real-time rendering includes:
- the local image and the remote sensing image basemap are displayed at the same time but are not synchronously scaled and superimposed;
- the server After the server receives the local image uploaded by the mobile terminal and the coordinates of the connection point matching file, the registration of the local image is performed;
- tile slicing and service publishing are performed on the server side;
- the published service is rendered in real-time on mobile devices.
- the basemap of the remote sensing image is firstly loaded, and then the local image without the geographic coordinate system is loaded on the mobile terminal screen through the picture display control.
- the remote sensing image basemap can be arbitrarily zoomed; the user can switch between the local image and the remote sensing image basemap to pick up connection points.
- the registration of the local image specifically includes: calculating the pixel coordinates of the local image and the connection point through the selected connection point. The corresponding relationship between the latitude and longitude of the actual geographic coordinates, the equation is constructed by the selected connection points.
- the least squares method is used to obtain six parameters a, b, c, d, e, and f; The process includes:
- a conversion parameter file is generated by calculating the six parameter values of a, b, c, d, e, and f, so that the local image has actual geographic coordinate information.
- performing tile slicing and service publishing on the server side after the local image registration specifically includes:
- the tile making program automatically obtains the basic information and configuration parameters of the image, including image pixels, coordinate system information, and output path. After the server automatically reads the configuration information, it calculates the tile level to be output and the corresponding output according to the configuration information. Scope: The local image is produced as tile data by automatically calling the tile slicing tool. After the tile production is completed, the server side uploads it, and configures the release information to complete the tile release process.
- the real-time rendering of the published service on the mobile terminal device specifically includes: both the calibrated local image and the remote sensing image basemap are stored in a standard map tile format; the front-end map engine is based on the current screen range. Get all the layer information in this range. When the tile IDs are the same but the layers are different, according to the layer serial number, the tiles with the large layer serial number are used to cover the small serial number tiles.
- the server before the server receives the local image uploaded by the mobile terminal and the coordinates of the connection point matching file, the following steps are required: select the connection point in the mobile terminal, obtain the image coordinates and actual geographic coordinates of the local image, and form The tie point matching file, and upload the local image and tie point matching file to the server.
- selecting the connection point in the mobile terminal, obtaining the image coordinates and actual geographic coordinates of the local image, forming the connection point matching file, and uploading the local image and the connection point matching file to the server specifically includes: Switch between image and remote sensing image basemap, pick connection points;
- connection point selection criteria in the selection of connection points in the mobile terminal include:
- connection points should be evenly distributed on the local image
- connection point matching file includes:
- Connection point serial number automatically generated by the program by means of self-increment
- the image coordinate ordinate of the local image is the origin coordinate, and the image coordinate is generated by manual selection;
- Another object of the present invention is to provide a system for rapid image calibration and real-time rendering, including:
- the mobile terminal is used for simultaneous display of local images and remote sensing image basemaps and asynchronous zoom overlay rendering
- the image coordinate and actual geographic coordinate acquisition and transmission module is used to select the connection point in the mobile terminal, obtain the image coordinate and actual geographic coordinate of the local image, and upload the matching file between the local image and the connection point to the server;
- the server is used to automatically perform rapid registration of the local image after receiving the local image uploaded by the mobile terminal and the coordinates of the connection point matching file;
- Tile slicing and service publishing modules are used to automatically complete tile slicing and service publishing on the server side;
- the rendering and viewing module is used for real-time rendering and viewing of the published service on the mobile terminal.
- Another object of the present invention is to provide a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, causes the processor to perform the following steps:
- the server After the server receives the local image uploaded by the mobile terminal and the coordinates of the connection point matching file, it automatically performs rapid registration of the local image;
- tile slicing and service publishing are automatically completed on the server side;
- the published service is rendered and viewed in real time on the mobile terminal.
- Another object of the present invention is to provide a mobile terminal that simultaneously displays a local image and a remote sensing image basemap and performs asynchronous scaling and overlay rendering; selecting a connection point to obtain the image coordinates and actual geographic coordinates of the local image, The connection point matching file is formed, and the image and the connection point matching file are uploaded to the server; the server performs the rapid registration of the local image, automatically completes the tile slicing and real-time rendering and viewing of the service after the service is published.
- the advantages and positive effects of the present invention are: in the mobile terminal, the local image and the remote sensing image basemap are simultaneously displayed but are not synchronously scaled and superimposed rendering, which provides usability for the selection of connection points in the mobile terminal. It solves the cumbersome and low-efficiency problems of traditional processing processes through automatic processing functions such as image correction, tile slicing, and service publishing, and transforms the extremely professional map operation process into automatic processing, allowing ordinary operators to easily Get started.
- the local image can be displayed on the mobile terminal smoothly after automatic processing, which facilitates easy access to the required data on the mobile terminal during field investigation and improves the efficiency of field investigation.
- the present invention has simple operability and strong practicability. Only mobile devices and no other tools are needed to complete the process of automatic image correction, tile slicing, and service publishing.
- the invention is efficient and convenient, and the corrected image can be viewed on the mobile terminal immediately after uploading the local image during field investigation, which is convenient and fast, and solves the problems that the mobile terminal image registration cannot be operated and the mobile terminal image cannot be viewed in real time.
- the advantages of the present invention further include:
- the invention provides a method, system, medium and mobile terminal for rapid image calibration and real-time rendering: mobile terminal equipment is an auxiliary device that must be used in field calls, and the mobile terminal can be used for field investigators.
- the survey records provide a convenient means, but the existing tile slicing and service publishing operations are complicated and inconvenient, and the image registration cannot be realized on the mobile terminal, resulting in inoperability in the field operation environment, resulting in the on-site personnel unable to quickly of using images in field operations.
- the present invention fully analyzes the contradiction between the high timeliness requirements of field images and the complex and low efficiency of tile slicing and service publishing operations, and develops a mobile terminal-based fast image calibration and real-time rendering method: the server receives the local image uploaded by the mobile terminal.
- the registration of the local image is performed; after the local image is registered, the tile is sliced and the service is published on the server side; the published service is rendered in real time on the mobile device.
- the method has simple operability and strong practicability, and can complete the process of automatic image correction, tile slicing, and service publishing only with a mobile terminal device and no other tools. In field investigation, after uploading the local image, the corrected image can be viewed on the mobile terminal immediately.
- FIG. 1 is a flowchart of a method for fast image calibration and real-time rendering provided by an embodiment of the present invention.
- FIG. 2 is a schematic diagram of a method for fast image calibration and real-time rendering provided by an embodiment of the present invention.
- FIG. 3 is a flowchart of tile slicing provided by an embodiment of the present invention.
- FIG. 4 is a flowchart of a calibrated image rendering process provided by an embodiment of the present invention.
- FIG. 5 is a schematic diagram of a system for fast image calibration and real-time rendering provided by an embodiment of the present invention.
- FIG. 1 is a method for fast image calibration and real-time rendering provided by an embodiment of the present invention, including:
- S101 Simultaneously display the local image and the remote sensing image basemap and perform asynchronous scaling and overlay rendering in the mobile terminal 1.
- connection points in the mobile terminal 1 obtain image coordinates and actual geographic coordinates of the local image, form a connection point matching file, and upload the image and connection point matching file to the server.
- the server 3 after receiving the local image uploaded by the mobile terminal 1 and the coordinates of the connection point matching file, the server 3 automatically performs rapid registration of the local image.
- tile slicing and service publishing are automatically completed on the server side on the basis of local image calibration.
- the published service is rendered and viewed in real time on the mobile terminal 1 device.
- FIG. 2 shows the principle of a method for fast image calibration and real-time rendering provided by an embodiment of the present invention.
- step S101 the local image and the remote sensing image basemap are simultaneously displayed and asynchronously zoomed and rendered in the mobile terminal 1, which specifically includes:
- the remote sensing image basemap is basically loaded first, and then the local image without geographic coordinate system is loaded into the mobile terminal 1 screen through the picture display control to realize the local image and remote sensing image basemap.
- Asynchronous zoom control realize the arbitrary zoom operation of the local image within the scope of the picture display control, and realize the arbitrary zoom operation of the remote sensing image basemap with the support of the map engine. Users can switch between the local image and the remote sensing image basemap to realize Easy and fast connection point picking.
- connection point selection criteria in step S102 are as follows:
- connection points are based on the feature points that can be clearly identified by the human eye, such as intersections, corner points of characteristic features, etc.
- connection points should be as evenly distributed on the local image as possible.
- connection point configuration file finally generated in step S102 is shown in Table 1 below, and the record information is as follows:
- Connection point serial number (ID): automatically generated by the program through self-increment.
- the image coordinate ordinate (h) of the local image is the origin coordinate, and the image coordinate is generated by manual selection.
- step S103 after receiving the local image uploaded by the mobile terminal 1 and the coordinates of the connection point matching file, the server 3 automatically performs rapid registration of the local image, specifically including:
- the essence of local image calibration is to calculate the correspondence between the pixel coordinates of the local image and the latitude and longitude of the actual geographic coordinates through the selected connection points, and to construct an equation through the selected connection points.
- the multiplication solution obtains six parameters a, b, c, d, e, and f.
- wi is the abscissa of the image coordinate
- hi is the abscissa of the image coordinate
- lon i is the longitude information of the actual geographic coordinate
- lat i is the latitude information of the actual geographic coordinate
- a, b, c, d, e, and f are the six conversion parameters to be determined
- S 2 represents the square of the total error.
- step S104 automatically completes tile slicing and service publishing on the server side on the basis of local image calibration, specifically including:
- the tile slicing process is shown in Figure 3.
- the tile making program automatically obtains the basic information and configuration parameters of the image, including image pixels, coordinate system information, and output path.
- the server After the server automatically reads the configuration information, according to the configuration information, calculate The tile level and corresponding output range that need to be output are obtained. On this basis, the local image is produced as tile data by automatically calling the tile map tool.
- the server side After the tile production is completed, the server side will automatically upload and automatically configure and publish information. to complete the tile publishing process.
- a corrected image is obtained.
- the basic information and configuration parameters of the image can be automatically obtained, including image pixels, coordinate system information, and output path.
- the server After the terminal automatically reads the configuration information, it calculates the tile level to be output and the corresponding tile output range according to the configuration information. After the tile is produced, it is automatically uploaded by the server, and the release information is automatically configured to complete the tile release process.
- the real-time rendering and viewing of the service published in step S105 on the mobile terminal 1 device specifically includes:
- the calibrated local images and remote sensing image basemaps are stored in the standard map tile format, as shown in Figure 4.
- the front-end map engine will obtain all layer information in the range according to the current screen range.
- the tiles with the large layer serial number will be used to cover the small serial number tiles.
- the calibrated local image and remote sensing image basemap are stored according to the standard map tile (Tile) protocol, as shown in FIG. 4 .
- the front-end map engine will obtain all the layer information in the range according to the current screen range. When the tile IDs are the same but they are different, the layer judgment will be performed.
- the layer number (LayerAnum) of the local image tile is 1, and the remote sensing
- the layer number (LayerB num) of the image tile is 0, and the tile with the larger layer number covers the tile with the smaller number, so the local image tile is displayed above the remote sensing image tile.
- an image rapid calibration and real-time rendering system including:
- Mobile terminal 1 used for simultaneous display of local images and remote sensing image basemaps and asynchronous scaling and overlay rendering.
- the server 3 is used to automatically perform rapid registration of the local image after receiving the local image uploaded by the mobile terminal 1 and the coordinates of the connection point matching file.
- the tile slicing and service publishing module 4 is used to automatically complete tile slicing and service publishing on the server side.
- the rendering and viewing module 5 is used for real-time rendering and viewing of the published service on the mobile terminal 1 .
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Abstract
本发明属于地理信息技术与图像处理技术领域，公开了一种图像快速校准与实时渲染方法、系统、介质及移动端。移动端将本地图像与遥感影像底图进行同时显示以及非同步缩放叠加渲染；服务端接收到移动端上传的本地图像及连接点匹配文件的坐标后，进行本地图像的配准；本地图像配准后在服务器端进行瓦片切图与服务发布；发布后的服务在移动端设备上实时渲染。本发明具有简易的操作性，很强的实用性。仅需移动端设备，不需要其他的工具，就能够完成自动图像校正、瓦片切图、服务发布的过程。本发明在野外调查时将本地图像的上传后立刻就能在移动端查看校正后的图像，便捷快速，解决了移动端图像配准无法操作和移动端图像无法实时查看的问题。
Description
本申请要求于2022年03月07日提交中国专利局、申请号为202210214032.6、发明名称为“一种图像快速校准与实时渲染方法、系统、介质及移动端”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
本发明属于地理信息技术与图像处理技术领域，尤其涉及一种基于移动终端的图像快速校准与实时渲染方法、系统、介质及移动端。
目前，传统将本地图像配准到具有空间信息的遥感影像或者矢量底图的方法，通常是采用桌面端的GIS软件进行处理，操作复杂且不便捷，由于无法在移动端实现图像的配准，致使在野外作业环境下不具备可操作性，导致现场人员无法快速的将图像用到野外业务中。
除此之外，由于目前的主流地图引擎系统在影像渲染时主要依赖瓦片地图，无法直接加载大幅的带地理坐标的图像数据，通过桌面GIS软件校准后的图像为大幅影像数据，仅可在桌面GIS软件内查看，无法直接通过主流地图引擎渲染后在移动端中查看，需要人工进行瓦片生产，并人工配置服务，才能进行展示，整个过程时间长，人工工作较多，因此校准后的图像在移动端的通用性较差。
通过上述分析，现有技术存在的问题及缺陷为：
(1)现有技术中，图像校正、瓦片切图、服务发布的过程繁琐，使得图像处理效率低下，实用性差。
(2)现有技术中，在野外调查时，图像处理设备图像配准无法操作和图像无法实时查看。
解决以上问题及缺陷的难度为：
(1)传统图像校正用桌面端的GIS工具中操作，在野外调研时无法使用，需在移动端上新建一种仅用简单的操作来实现图像校正方法；
(2)现有技术中图像校正、瓦片切图、服务发布等多人协作的操作过程，要实现自动化处理和移动端的实时渲染，难点为需统一前后数据交 换接口，确定标准的数据配置信息，建立标准化的服务发布规则，并实现服务器端实时处理。
解决以上问题及缺陷的意义为：通过图像快速校准与实时渲染方法，解决了图像校正、瓦片切图、服务发布的过程繁琐，效率低的问题，让极其专业的地图操作过程转变为自动化处理，可以让普通作业员轻松上手。可将本地图像通过自动化处理后在移动端上流畅的展示，利于野外调查时在移动端上轻松访问所需数据，提高野外调查的效率。
发明内容
为克服相关技术中存在的问题，本发明公开实施例提供了一种图像快速校准与实时渲染方法、系统、介质及移动端。具体涉及一种基于移动终端的图像快速校准与实时渲染方法。
本发明目的在于解决如何克服图像校正复杂不便捷难题，解决快速在移动端渲染展示的问题。
所述技术方案如下：一种图像快速校准与实时渲染方法包括：
移动端中将本地图像与遥感影像底图进行同时显示但非同步缩放叠加渲染；
服务端接收到移动端上传的本地图像及连接点匹配文件的坐标后，进行本地图像的配准；
本地图像配准后在服务器端进行瓦片切图与服务发布；
发布后的服务在移动端设备上实时渲染。
在一个实施例中，在移动端地图引擎和图片显示控件的共同支撑下，首先对遥感影像底图进行基本加载，然后通过图片显示控件将本地图像无地理坐标系的加载的移动端屏幕中，实现无地理坐标系本地图像和有地理坐标系的遥感影像底图的同时显示和非同步缩放控制；所述非同步缩放控制包括：在图片显示控件范围内实现本地图像的任意缩放操作在以及地图引擎的支持下实现遥感影像底图的任意缩放操作；用户在本地图像和遥感影像底图之间切换实现连接点拾取。
在一个实施例中，所述服务端接收到移动端上传的本地图像及连接点匹配文件的坐标后，进行本地图像的配准具体包括：通过已选择的连接点，计算本地图像的像素坐标与实际地理坐标经纬度之间的对应关系，通过选 取的连接点构建方程，当连接点数大于3组时，使用最小二乘法解算得到a、b、c、d、e、f六个参数；解算过程包括：
总误差的平方为：
S
2＝Σ(f(w
i，h
i)-(lon
i，lat
i))
2＝Σ((aw
i+dw
i+bh
i+eh
i+c+f)-(lon
i+lat
i))
2；
S
2最小，通过解上述线性方程组得到a、b、c、d、e、f六个参数值。
在一个实施例中，通过计算得到的a、b、c、d、e、f六个参数值生成转换参数文件，使本地图像具备实际地理坐标信息。
在一个实施例中，所述本地图像配准后在服务器端进行瓦片切图与服务发布具体包括：
瓦片制作程序自动获取图像的基本信息以及配置参数，包括图像像素、坐标系信息、输出路径，服务器端自动读到配置信息后，根据配置信息，计算出需要输出的瓦片层级和相应的输出范围；通过自动调用瓦片切图工具将本地图像生产为瓦片数据，瓦片生产完成后由服务器端上传，并配置发布信息，完成瓦片发布的过程。
在一个实施例中，所述发布后的服务在移动端设备上实时渲染具体包括：校准后的本地图像与遥感影像底图均按照标准的地图瓦片格式进行存 储；前端地图引擎根据当前屏幕范围获取该范围内的所有图层信息，当瓦片ID相同、但图层不同时，根据图层序号，用图层序号大的瓦片覆盖序号小的瓦片。
在一个实施例中，所述服务端接收到移动端上传的本地图像及连接点匹配文件的坐标前还需进行：在移动端中选取连接点，获取本地图像的图像坐标及实际地理坐标，形成连接点匹配文件，并将本地图像及连接点匹配文件上传至服务器。
在一个实施例中，所述在移动端中选取连接点，获取本地图像的图像坐标及实际地理坐标，形成连接点匹配文件，并将本地图像及连接点匹配文件上传至服务器具体包括：在本地图像和遥感影像底图之间切换，拾取连接点；
所述在移动端中选取连接点中连接点选择标准包括：
(1)连接点选择时能清晰识别特征点；
(2)本地图像与遥感影像的快速配准需要选择至少三组本地图像与遥感影像的连接点对；
(3)连接点的分布应均匀分布在本地图像上；
所述连接点匹配文件包括：
1)连接点序号：由程序通过自增的方式自动生成；
2)本地图像的图像坐标横坐标：本地图像左上角为原点坐标，图像坐标由人工选取生成；
3)本地图像的图像坐标纵坐标：本地图像左上角为原点坐标，图像坐标由人工选取生成；
4)像素坐标对应的实际地理坐标经度信息：经纬度由人工在遥感影像底图上选择获取；
5)像素坐标对应的实际地理坐标纬度信息：经纬度由人工在遥感影像底图上选择获取。
本发明的另一目的在于提供一种图像快速校准与实时渲染系统，包括：
移动端，用于将本地图像与遥感影像底图进行同时显示以及非同步缩放叠加渲染；
图像坐标、实际地理坐标获取和传输模块，用于在移动端中选取连接点，获取本地图像的图像坐标及实际地理坐标，并将本地图像与连接点匹配文件上传至服务器；
服务端，用于接收到移动端上传的本地图像及连接点匹配文件的坐标后，自动进行本地图像的快速配准；
瓦片切图、服务发布模块，用于在服务器端自动完成瓦片切图与服务发布；
渲染查看模块，用于发布后的服务在移动端上实时渲染查看。
本发明的另一目的在于提供一种计算机可读存储介质，存储有计算机程序，所述计算机程序被处理器执行时，使得所述处理器执行如下步骤：
在移动端中将本地图像与遥感影像底图进行同时显示以及非同步缩放叠加渲染；
在移动端中选取少量连接点，获取本地图像的图像坐标及实际地理坐标，并将图像与连接点匹配文件上传至服务器；
服务端接收到移动端上传的本地图像及连接点匹配文件的坐标后，自动进行本地图像的快速配准；
在本地图像校准的基础上在服务器端自动完成瓦片切图与服务发布；
发布后的服务在移动端上实时渲染查看。
本发明的另一目的在于提供一种移动端，所述移动端将本地图像与遥感影像底图进行同时显示以及非同步缩放叠加渲染；选取连接点，获取本地图像的图像坐标及实际地理坐标，形成连接点匹配文件，并将图像与连接点匹配文件上传至服务器；将服务器进行本地图像的快速配准、自动完成瓦片切图与服务发布后的服务实时渲染查看。
结合上述的所有技术方案，本发明所具备的优点及积极效果为：移动端中将本地图像与遥感影像底图进行同时显示但非同步缩放的叠加渲染，为移动端中连接点选取提供了可用的简便工具，通过图像校正、瓦片切图、服务发布等自动化处理功能，解决了传统处理过程繁琐、效率低的问题，让极其专业的地图操作过程转变为自动化处理，可以让普通作业员轻松上手。可将本地图像通过自动化处理后在移动端上流畅的展示，利于野外调查时在移动端上轻松访问所需数据，提高野外调查的效率。
本发明具有简易的操作性，很强的实用性。仅需移动端设备，不需要其他的工具，就能够完成自动图像校正、瓦片切图、服务发布的过程。
本发明高效便捷，在野外调查时将本地图像的上传后立刻就能在移动端查看校正后的图像，便捷快速，解决了移动端图像配准无法操作和移动端图像无法实时查看的问题。
相比于现有技术，本发明的优点进一步包括：
本发明提供一种图像快速校准与实时渲染方法、系统、介质及移动端：移动端设备是野外调用必须用到一种辅助设备，利用移动端可以很好的为野外调查人员前期出行规划和现场调查记录提供便捷的手段，但现有瓦片切图和服务发布操作复杂且不便捷，无法在移动端实现图像的配准，致使在野外作业环境下不具备可操作性，导致现场人员无法快速的将图像用到野外业务中。本发明充分分析外业用图时效要求高和瓦片切图和服务发布操作复杂、效率低的矛盾，研制了基于移动端的图像快速校准与实时渲染方法：服务端接收到移动端上传的本地图像及连接点匹配文件的坐标后，进行本地图像的配准；本地图像配准后在服务器端进行瓦片切图与服务发布；发布后的服务在移动端设备上实时渲染。本方法具有简易的操作性，很强的实用性，仅需移动端设备，不需要其他的工具，就能够完成自动图像校正、瓦片切图、服务发布的过程。在野外调查时将本地图像的上传后立刻就能在移动端查看校正后的图像，便捷快速，解决了移动端图像配准无法操作和移动端图像无法实时查看的问题，具有重要的实际意义。
当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本发明的公开。
说明书附图
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本公开的实施例，并与说明书一起用于解释本公开的原理。
图1是本发明实施例提供的图像快速校准与实时渲染方法流程图。
图2是本发明实施例提供的图像快速校准与实时渲染方法原理图。
图3是本发明实施例提供的瓦片切图流程图。
图4是本发明实施例提供的校准后的影像渲染过程流程图。
图5是本发明实施例提供的图像快速校准与实时渲染系统示意图。
图中：1-移动端；2-图像坐标、实际地理坐标获取和传输模块；3-服务端；4-瓦片切图、服务发布模块；5-渲染查看模块。
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
为使本发明的上述目的、特征和优点能够更加明显易懂，下面结合附图对本发明的具体实施方式做详细的说明。在下面的描述中阐述了很多具体细节以便于充分理解本发明。但是本发明能够以很多不同于在此描述的其他方式来实施，本领域技术人员可以在不违背本发明内涵的情况下做类似改进，因此本发明不受下面公开的具体实施的限制。
参照图1和图5，图1是本发明实施例提供的图像快速校准与实时渲染方法，包括：
S101，在移动端1中将本地图像与遥感影像底图进行同时显示以及非同步缩放叠加渲染。
S102，在移动端1中选取少量连接点，获取本地图像的图像坐标及实际地理坐标，形成连接点匹配文件，并将图像与连接点匹配文件上传至服务器。
S103，服务端3接收到移动端1上传的本地图像及连接点匹配文件的坐标后，自动进行本地图像的快速配准。
S104，在本地图像校准的基础上在服务器端自动完成瓦片切图与服 务发布。
S105，发布后的服务在移动端1设备上实时渲染查看。
图2是本发明实施例提供的图像快速校准与实时渲染方法原理。
在本发明一优选实施例中，步骤S101在移动端1中将本地图像与遥感影像底图进行同时显示以及非同步缩放叠加渲染，具体包括：
在移动端1地图引擎的支持下，首先对遥感影像底图进行基本加载，然后通过图片显示控件将本地图像无地理坐标系的加载的移动端1屏幕中，实现本地图像和遥感影像底图的非同步缩放控制，在图片显示控件范围内实现本地图像的任意缩放操作，在地图引擎的支持下实现遥感影像底图的任意缩放操作，用户可在本地图像和遥感影像底图之间切换，实现便捷地、快速地连接点拾取。
在本发明一优选实施例中，步骤S102中连接点选择标准如下：
(1)连接点选择时以人眼可清晰识别的特征点为准，例如路口交叉点、特征地物角点等。
(2)本地图像与遥感影像的快速配准需要选择至少三组本地图像与遥感影像的连接点对。
(3)连接点的分布应尽量均匀分布在本地图像上。
在本发明一优选实施例中，步骤S102最终生成的连接点配置文件如下表1所示，记录信息如下：
1)连接点序号(ID)：由程序通过自增的方式自动生成。
2)本地图像的图像坐标横坐标(w)：本地图像左上角为原点坐标，图像坐标由人工选取生成。
3)本地图像的图像坐标纵坐标(h)：本地图像左上角为原点坐标，图像坐标由人工选取生成。
4)像素坐标对应的实际地理坐标经度信息(lon)：经纬度由人工在遥感影像底图上选择获取。
5)像素坐标对应的实际地理坐标纬度信息(lat)：经纬度由人工在遥感影像底图上选择获取。
表1
| ID | w | h | lon | lat |
| 1 | 528 | 562 | 116.23840 | 40.07216 |
| 2 | 150 | 236 | 116.20973 | 40.09128 |
| 3 | 1226 | 194 | 116.29207 | 40.09363 |
在本发明一优选实施例中，步骤S103中，服务端3接收到移动端1上传的本地图像及连接点匹配文件的坐标后，自动进行本地图像的快速配准，具体包括：
本地图像校准的本质是通过已选择的连接点，计算本地图像的像素坐标与实际地理坐标经纬度之间的对应关系，通过选取的连接点构建方程，当连接点数大于3组时，可使用最小二乘法解算得到a、b、c、d、e、f六个参数。
总误差的平方为：
S
2＝Σ(f(w
i，h
i)-(lon
i，lat
i))
2＝Σ((aw
i+dw
i+bh
i+eh
i+c+f)-(lon
i+lat
i))
2；
以上公式中，w
i为图像坐标横坐标，h
i为图像坐标横坐标，lon
i为实际地理坐标经度信息，lat
i为实际地理坐标纬度信息，i(1,2,3,…,n)表示为第i个连接点，a、b、c、d、e、f为待求的六个转换参数，S
2表示总误差的平方。
此时S
2最小，通过解上述线性方程组得到a、b、c、d、e、f六个参数值，通过计算得到的参数值生成转换参数文件，使得本地图像具备了实际地理坐标信息。
在本发明一优选实施例中，步骤S104在本地图像校准的基础上在服务器端自动完成瓦片切图与服务发布，具体包括：
瓦片切图流程如图3所示，瓦片制作程序自动获取图像的基本信息以及配置参数，包括图像像素、坐标系信息、输出路径，服务器端自动读到配置信息后，根据配置信息，计算出需要输出的瓦片层级和相应的输出范围，在此基础上通过自动调用瓦片切图工具将本地图像生产为瓦片数据，瓦片生产完成后由服务器端自动上传，并自动配置发布信息，完成瓦片发布的过程。
具体地，本地图像经过连接点文件进行坐标转换后，得到校正后的影像，校正后影像经过服务器分析，可自动获取图像的基本信息以及配置参数，包括图像像素、坐标系信息、输出路径，服务器端自动读到配置信息后，根据配置信息，计算出需要输出的瓦片层级和相应的瓦片输出范围，在此基础上通过自动调用瓦片切图工具将本地图像生产为瓦片数据，瓦片生产完成后由服务器端自动上传，并自动配置发布信息，从而完成瓦片发布的过程。
在本发明一优选实施例中，步骤S105发布后的服务在移动端1设备上实时渲染查看具体包括：
校准后的本地图像与遥感影像底图均按照标准的地图瓦片格式进行存储，如图4所示。前端地图引擎会根据当前屏幕范围获取该范围内的所有图层信息，当瓦片ID相同、但图层不同时，根据图层序号，用图层序号大的瓦片覆盖序号小的瓦片。
具体地，校准后的本地图像与遥感影像底图均按照标准的地图瓦片(Tile)协议进行存储，如图4所示。前端地图引擎会根据当前屏幕范围 获取该范围内的所有图层信息，当瓦片ID相同、但所属不同时，则进行图层判断，本地图像瓦片的图层序号(LayerAnum)为1，遥感影像瓦片的图层序号(LayerB num)为0，图层序号大的瓦片覆盖序号小的瓦片，因此本地图像瓦片则显示在遥感影像瓦片的上方。
其中，图4中，LayerA Tile id＝0；LayerB Tile id＝0；因为LayerA num>LayerB num，因此本地图像中A图层瓦片覆盖遥感影像中B图层瓦片。
如图5所示，在本发明中，还提供一种图像快速校准与实时渲染系统，包括：
移动端1，用于将本地图像与遥感影像底图进行同时显示以及非同步缩放叠加渲染。
图像坐标、实际地理坐标获取和传输模块2，用于在移动端1中选取连接点，获取本地图像的图像坐标及实际地理坐标，形成连接点匹配文件，并将本地图像与连接点匹配文件上传至服务器。
服务端3，用于接收到移动端1上传的本地图像及连接点匹配文件的坐标后，自动进行本地图像的快速配准。
瓦片切图、服务发布模块4，用于在服务器端自动完成瓦片切图与服务发布。
渲染查看模块5，用于发布后的服务在移动端1上实时渲染查看。
本申请旨在涵盖本公开的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本公开的真正范围和精神由所附的权利要求指出。应当理解的是，本公开并不局限于上面已经描述并在附图中示出的精确结构，并且可以在不脱离其范围进行各种修改和改变。
Claims (10)
- 一种图像快速校准与实时渲染方法，其特征在于，所述图像快速校准与实时渲染方法包括：移动端将本地图像与遥感影像底图进行同时显示以及非同步缩放叠加渲染；服务端接收到移动端上传的本地图像及连接点匹配文件的坐标后，进行本地图像的配准；本地图像配准后在服务器端进行瓦片切图与服务发布，发布后的服务在移动端设备上实时渲染。
- 根据权利要求1所述的图像快速校准与实时渲染方法，其特征在于，所述移动端将本地图像与遥感影像底图进行同时显示以及非同步缩放叠加渲染具体为：所述同时显示包括：在移动端地图引擎和图片显示控件的共同支撑下，首先对遥感影像底图进行基本加载，然后通过图片显示控件将本地图像无地理坐标系的加载的移动端屏幕中，实现无地理坐标系本地图像和有地理坐标系的遥感影像底图的同时显示和非同步缩放控制；所述非同步缩放控制包括：在图片显示控件范围内实现本地图像的任意缩放操作以及在地图引擎的支持下实现遥感影像底图的任意缩放操作；用户在本地图像和遥感影像底图之间切换实现连接点拾取。
- 根据权利要求1所述的图像快速校准与实时渲染方法，其特征在于，所述服务端接收到移动端上传的本地图像及连接点匹配文件的坐标后，进行本地图像的配准具体包括：通过已选择的连接点，计算本地图像的像素坐标与实际地理坐标经纬度之间的对应关系，通过选取的连接点构建方程，当连接点数大于3组时，使用最小二乘法解算得到a、b、c、d、e、f六个参数；解算过程包括：
总误差的平方为：S 2＝Σ(f(w i，h i)-(lon i，lat i)) 2＝Σ((aw i+dw i+bh i+eh i+c+f)-(lon i+lat i)) 2；
S 2最小，通过解上述线性方程组得到a、b、c、d、e、f六个参数值，通过计算得到的a、b、c、d、e、f六个参数值生成转换参数文件，使本地图像具备实际地理坐标信息；其中，w i为图像坐标横坐标，h i为图像坐标横坐标，lon i为实际地理坐标经度信息，lat i为实际地理坐标纬度信息，i(1,2,3,…,n)表示为第i个连接点，a、b、c、d、e、f为待求的六个转换参数，S 2表示总误差的平方。 - 根据权利要求1所述的图像快速校准与实时渲染方法，其特征在于，所述本地图像配准后在服务器端进行瓦片切图与服务发布，具体包括：瓦片制作程序自动获取图像的基本信息以及配置参数，包括图像像素、坐标系信息、输出路径，服务器端自动读到配置信息后，根据配置信息，计算出需要输出的瓦片层级和相应的输出范围；通过自动调用瓦片切图工具将本地图像生产为瓦片数据，瓦片生产完成后由服务器端上传，并配置发布信息，完成瓦片发布的过程。
- 根据权利要求1所述的图像快速校准与实时渲染方法，其特征在于，所述发布后的服务在移动端设备上实时渲染，具体包括：校准后的本地图像与遥感影像底图均按照标准的地图瓦片格式进行存储；前端地图引擎根据当前屏幕范围获取该范围内的所有图层信息，当瓦片ID相同、但图层不同时，根据图层序号，用图层序号大的瓦片覆盖序号小的瓦片。
- 根据权利要求1所述的图像快速校准与实时渲染方法，其特征在于，所述服务端接收到移动端上传的本地图像及连接点匹配文件的坐标后，进行本地图像的配准前还需进行：在移动端中选取连接点，获取本地图像的图像坐标及实际地理坐标，形成连接点匹配文件，并将图像与连接点匹配文件上传至服务器。
- 根据权利要求6所述的图像快速校准与实时渲染方法，其特征在于，所述在移动端中选取连接点，获取本地图像的图像坐标及实际地理坐标，形成连接点匹配文件，并将图像与连接点匹配文件上传至服务器，具体包括：在本地图像和遥感影像底图之间切换，拾取连接点；所述在移动端中选取连接点中连接点选择标准，包括：(1)连接点选择时能清晰识别特征点；(2)本地图像与遥感影像的快速配准需要选择至少三组本地图像与遥感影像的连接点对；(3)连接点的分布应均匀分布在本地图像上；所述连接点匹配文件包括：1)连接点序号：由程序通过自增的方式自动生成；2)本地图像的图像坐标横坐标：本地图像左上角为原点坐标，图像坐标由人工选取生成；3)本地图像的图像坐标纵坐标：本地图像左上角为原点坐标，图像坐标由人工选取生成；4)像素坐标对应的实际地理坐标经度信息：经纬度由人工在遥感影像底图上选择获取；5)像素坐标对应的实际地理坐标纬度信息：经纬度由人工在遥感影像底图上选择获取。
- 一种实施权利要求1～7任意一项所述图像快速校准与实时渲染方法的图像快速校准与实时渲染系统，其特征在于，所述图像快速校准与实时渲染系统包括：移动端，用于将本地图像与遥感影像底图进行同时显示以及非同步缩放叠加渲染；图像坐标、实际地理坐标获取和传输模块，用于在移动端中选取连接点，获取本地图像的图像坐标及实际地理坐标，并将本地图像与连接点匹配文件上传至服务器；服务端，用于接收到移动端上传的本地图像及连接点匹配文件的坐标后，自动进行本地图像的快速配准；瓦片切图、服务发布模块，用于在服务器端自动完成瓦片切图与服务 发布；渲染查看模块，用于发布后的服务在移动端上实时渲染查看。
- 一种计算机可读存储介质，存储有计算机程序，所述计算机程序被处理器执行时，使得所述处理器执行如下步骤：在移动端将本地图像与遥感影像底图进行同时显示以及非同步缩放叠加渲染；在移动端中选取少量连接点，获取本地图像的图像坐标及实际地理坐标，并将图像与连接点匹配文件上传至服务器；服务端接收到移动端上传的本地图像及连接点匹配文件的坐标后，自动进行本地图像的快速配准；在本地图像校准的基础上在服务器端自动完成瓦片切图与服务发布；发布后的服务在移动端上实时渲染查看。
- 一种移动端，其特征在于，所述移动端将本地图像与遥感影像底图进行同时显示以及非同步缩放叠加渲染；选取连接点，获取本地图像的图像坐标及实际地理坐标，并将图像与连接点匹配文件上传至服务器；将服务器进行本地图像的快速配准、自动完成瓦片切图与服务发布后的服务实时渲染查看。
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| CN115982777A (zh) * | 2023-02-13 | 2023-04-18 | 西安大地测绘股份有限公司 | 私有云下面向移动端的地理信息数据安全使用系统及方法 |
| CN116108214A (zh) * | 2023-02-24 | 2023-05-12 | 中科星图数字地球合肥有限公司 | 遥感影像数据的处理方法、装置、计算机设备和存储介质 |
| CN116842013A (zh) * | 2023-06-29 | 2023-10-03 | 浙江锦智人工智能科技有限公司 | 一种栅格地图数据存储方法及设备 |
| CN117221336A (zh) * | 2023-11-08 | 2023-12-12 | 江西省水利科学院(江西省大坝安全管理中心、江西省水资源管理中心) | 一种遥感影像发布方法及系统 |
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| CN104599281B (zh) * | 2015-02-03 | 2016-03-02 | 中国人民解放军国防科学技术大学 | 一种基于水平直线方位一致性的全景图与遥感图配准方法 |
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| CN113570645A (zh) * | 2021-01-19 | 2021-10-29 | 腾讯科技（深圳）有限公司 | 图像配准方法、装置、计算机设备及介质 |
| CN114092326A (zh) * | 2021-10-29 | 2022-02-25 | 中国科学院空天信息创新研究院 | 一种Web地图瓦片更新处理方法及装置 |
| CN114020756B (zh) * | 2022-01-06 | 2022-04-05 | 北京帝测科技股份有限公司 | 遥感影像实时地图服务发布方法和装置 |
| CN114331914B (zh) * | 2022-03-07 | 2022-05-24 | 中咨数据有限公司 | 一种图像快速校准与实时渲染方法、系统、介质及移动端 |
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| CN115982777A (zh) * | 2023-02-13 | 2023-04-18 | 西安大地测绘股份有限公司 | 私有云下面向移动端的地理信息数据安全使用系统及方法 |
| CN115982777B (zh) * | 2023-02-13 | 2023-10-03 | 西安大地测绘股份有限公司 | 私有云下面向移动端的地理信息数据安全使用系统及方法 |
| CN116108214A (zh) * | 2023-02-24 | 2023-05-12 | 中科星图数字地球合肥有限公司 | 遥感影像数据的处理方法、装置、计算机设备和存储介质 |
| CN116108214B (zh) * | 2023-02-24 | 2024-02-06 | 中科星图数字地球合肥有限公司 | 遥感影像数据的处理方法、装置、计算机设备和存储介质 |
| CN116842013A (zh) * | 2023-06-29 | 2023-10-03 | 浙江锦智人工智能科技有限公司 | 一种栅格地图数据存储方法及设备 |
| CN117221336A (zh) * | 2023-11-08 | 2023-12-12 | 江西省水利科学院(江西省大坝安全管理中心、江西省水资源管理中心) | 一种遥感影像发布方法及系统 |
| CN117221336B (zh) * | 2023-11-08 | 2024-01-30 | 江西省水利科学院(江西省大坝安全管理中心、江西省水资源管理中心) | 一种遥感影像发布方法及系统 |
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