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Date: Mon, 02 Dec 1996 15:34:31 GMTServer: NCSA/1.4.2Content-type: text/html<HTML><head><title>KHOROS 2.0.1 Developer's Release</title></head><body><h1>KHOROS 2.0.1 Developer's Release</h1><h2>What is it?</h2>Khoros is a fully fledged general programming environment thatsupports data flow programming. You can quickly develop an application by pasting existing library modules on a workspace,connecting the inputs and outputs of the modules, and runthe network of modules.<p>The Khoros system is currently installed on department's SGI'sand Suns. However, only the Sun installation is complete (containsall the extra toolboxes and sample data).<h2>Configuration</h2> First you have to configure your environment. If you have previouslyused Khoros 1.0 you should remove from your .cshrc file all therelated information. Especially important is that you remove a path tothe old Khoros bin. <p> Now you have to log on to one of the Sun workstations, e.g.,hobbes. Then you need to execute/projects/image/KHOROS_2.0.1DR/bin/kconfigure. Among other things itwill ask you about the base directory for Khoros, that will be/projects/image/KHOROS_2.0.1DR. You should accept all the otherdefaults. <p> The configuration script creates a file .khoros_env into your homedirectory. You should add lines <ul> <li>setenv DIP /projects/image/KHOROS_2.0.1DR/dip_course_alpha <li>setenv MMACH /projects/image/KHOROS_2.0.1DR/mmach </ul> into that file. This environment variable is needed if you want toexecute the sample workspaces that you can download from the KhorosDIP course. After you modified the .khoros_env, type source .cshrc andrehash.<h2>Trying it out</h2> You should be now able to run cantata, the graphical user interfaceof Khoros. Type cantata. If you now get error messages about somemissing libraries, you should add<ul> setenv LD_LIBRARY_PATH /usr/X11R5/lib:/usr/openwin/lib:/usr/local/motif-1.2.2/lib:/usropt/lib</ul> into your .cshrc, type source .cshrc and try again. Warning: cantatais rather particular about its colors. If you run mosaic or netscapewhile running cantata you'll get dozens of warnings about colors thatcouldn't be allocated and you may end up trying to read white texton white background (which is quite hard...) <p> To test everything is fine, try this exercise. Go to Input/Outputmenu and choose Generate Data/2D Gaussian. Place the module to yourworkspace. Then go to Visualization menu, choose Non-InteractiveDisplay/Display Image and place it to the workspace to the right fromthe 2D Gaussian module. Connect the right (yellow) arrow of the 2DGaussian to the upper left arrow of the Display Image by clicking thearrows. Click the option icon of the 2D Gaussian module, it shouldopen you a window with several parameters. Set the values of variancealong height and width and the peak value all to 100, then close theoption window. Now run the whole workspace by pressing the leftmostaccelerator icon (above "Command String:"). After a short while youshould get a window with some white Gaussian blur on black background.<h2>How to learn more</h2> There are some on-line helps that you can access directly fromcantata that explain what Khoros and cantata are about and how to usethem. There is also a whole <ahref="http://www.khoros.unm.edu/dip/html/dip.html">course </a> aboutimage processing with Khoros that is really useful.<h2>A tip for homeworks and learning</h2> You can download fully configured workspaces from the DIP course thatdemonstrate image processing tricks and how they are done with Khoros(use the Files button on the left of the workspace to load them). Forexample, all the edge detection and Laplace filtering stuff isdirectly there. Remember to set the environment variables DIP andMMACH, though, the examples use them. <p> If you notice that there is something missing or wrong in theseinstructions, please send mail to kapu@cs. Also good tips are welcome(such as how does one use the *.pane files that you can also downloadfrom the DIP course).<address>(Last Update: 18 April 1995)</address></body></html>
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