http://groklab.org/searchandrescuerobot Building Robots and Engineers Fri, 20 Feb 2009 07:16:54 +0000 http://backend.userland.com/rss092 en The Webcam Laser Rangefinder portion of the USAR Sim robot is all wrapped up for the time being. Sorry that the source code is saved as a PDF. There is no other way to upload it. Final Report- This is the final report which has been submitted as a honors ... http://groklab.org/searchandrescuerobot/2009/02/20/its-done/ Below the bump. If you use this, you might want to update it with the power law calibration used in their paper. package image_processing; /****************************************************************************** History: 5/24/2006 - Original Version by Janahan Thevaseelan 7/11/2006 - Updated by Roborealm to be more in sync with other extensions Notes: You should be able to run this just using java ... http://groklab.org/searchandrescuerobot/2009/02/19/final-image-processing-code-for-laser-rangfinder/ Howard and Eric explain how they set up the laser range finder, calibrated and tested it. Here is their final report. http://groklab.org/searchandrescuerobot/2009/02/19/howard-and-erics-honors-report/ The rangerfinder algorithm was calibrated. Measurements of pixel from center were taken every five inches from around 2 to eight feet. A power curve was fitted to the data and produced error that was less than 10%. Code should be released sometime next week. http://groklab.org/searchandrescuerobot/2008/10/31/happy-halloween/ The image processing algorithm has been written and tested. It does a reasonably good job at finding the brightest pixel from center, but reflections off the metal tool chest still gives it problems. We'll try to calibrate the vision system to get some distance measurements off it. Look for the ... http://groklab.org/searchandrescuerobot/2008/10/31/image-processing-algorithm/ I never knew that one could write code for Microsoft Excel until last year. The macros are mostly used to automate repetitive tasks and perform complex calculations. (It could also be used to make music videos. Check out http://www.youtube.com/watch?v=h9_YkXHCkgA) Since a spreadsheet is made out of individual cells, the spreadsheet ... http://groklab.org/searchandrescuerobot/2008/10/29/microsoft-excel-macros/ The java version of the sample code was downloaded and recompiled and works like a charm after some initial compiling issues. Since it is a socket connection, it allows the image to be processed on another computer if needed. Now all that is needed is to modify the program to ... http://groklab.org/searchandrescuerobot/2008/10/27/socket-interface/ The plan is to use the webcam and a laser to determine how far an object is from the robot. We wanted to use a horizontal laser line so multiple distance measurements could be made from each frame. The laser line proved to be too faint for the camera to ... http://groklab.org/searchandrescuerobot/2008/10/26/laser-rangefinder-progress/ Realizing that no one seemed to post on the front page of the blog in 10 months, I figured that I should provide a brief upgrade on the robot. Roborealm is currently used as the backbone of this project. In addition to providing a substantial list of image processing capabilities, ... http://groklab.org/searchandrescuerobot/2008/10/26/slowly-but-surely/ Well... this is the completed prototype... (One can only hope...) http://groklab.org/searchandrescuerobot/2007/12/19/pictures/