![]() ![]() Our selected regions differ from native OSD overlays. Working in viewing mode, the user can zoom and pan selected images and see already marked out selected regions along with their annotations. The panel location may be switched with Layout toggle. Image annotation is placed into a side panel which locates either to the left or to the right of the image panel. The user selects an image name from the dropbox and views the image along with its annotation, if any. Upon receiving it by the Web Viewer application, the list is placed to the client toolbar dropbox. So to provide the client with the required list Viewer Server retrieves names of subfolders from a well-known folder containing all available image pyramids. In our code sample, for the sake of simplicity, it was assumed that Upload Server, images tile pyramid file storage and Viewing Server are located in the same machine. When the Viewer page was loaded, it requests Viewing Server for the list of images available for viewing. In this mode, the Viewer's toolbar includes dropbox of images is available for viewing, following by Layout and Edit toggles. The Viewer is initially opened in viewing mode (Figures 2a and 2b). The Image Viewer in viewing mode (fragment). To view and possibly annotate the image, the user should browse on yielding the page shown in Figures 2a and 2b.įigure 2b. When the image pyramid has been created, the image is ready for DZ viewing and annotation performed by the viewing subsystem. Its mission is to create image tile pyramid from an original image. Image Processor dzPyramidBuilder.dll is a. The latter accepts uploaded file, places it to a file storage and runs Image Processor in a separate process. Then the user finds the required image and by pressing button Upload, posts the image to Upload Server. When user would like to upload an image, she/he browses on and gets a very simple page for image upload. Web application for viewing, mark out and annotation of the image ![]() NET Core DLL (currently running in Windows only) Image upload to file storage and start of Image Processor to make image tile pyramidĪ simple Web page backing by Image Upload Server providing UI for the uploadĬomponent to create image tile pyramid out of original image Components of the presented software are listed in the following table: Table. The structure of the system is depicted in Figure 1. ![]() ![]() So, a different technique for mark out and annotation based on direct drawing in canvas rather than HTML elements usage is implemented in this work. It seems that such an approach is not quite handy for online mark out, particularly for regions with irregular shape. OSD overlays use "flying" HTML elements placed over selected regions in image. This API also supports overlay mechanism for mark out. OSD provides developer API available from JavaScript (JS) to be used in Web browser. This work presents Web based software using OSD DZ technology for large images viewing. Open Seadragon (OSD) project provides similar capabilities framework agnostic as a completely open source. It worked just fine in Web applications but required browser support for Silverlight. DZ was shipped with Microsoft Silverlight used in Silverlight Multiscale Image control. To address this need, the technology called Deep Zoom (DZ) was developed by Seadragon Software team within Microsoft. It's even better to have these tools available as platform independent Web applications with zero footprints on a user's machine / device. Users need tools to load and view such images with seamless zooming and pan capabilities without the loading time or latency, mark out and annotate certain regions of them. In many modern applications, there are requirements for easy and efficient work with large high resolution images. ![]()
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