From: Daniel M. G. <dm...@uv...> - 2006-12-19 20:50:24
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Hi Pablo, Do you know where I can read about it? BTW, I checked the paper you mentioned in Max's forum (the one comparing different types of cameras). I wonder if the main issue was not ridigity, but lack of estimation of the sensor shift. dmg Pablo d'Angelo twisted the bytes to say: Pablo> Hi all, Pablo> The latest talk about robust estimation made me realize that I wanted to try Pablo> if using an M-estimator during optimization has a beneficial effect, Pablo> especially when used straight with control points from autopano. Pablo> I have added support for the Huber M-estimator. Excerpt from doc/Optimise.txt: Pablo> # Pablo> # 'm'-line options Pablo> # ---------------- Pablo> # Pablo> # m0 use Huber m-estimator during second optimisation pass. Pablo> # This will reduce the weight of control points with higher Pablo> # errors. It might help a little if a pano contains a few Pablo> # inaccurate or completely wrong control points. Pablo> # 0: no m-estimator (as in previous versions) Pablo> # Any other number is the sigma parameter of the huber Pablo> # m-estimator. Control points with errors higher than sigma Pablo> # will have less influence during the optimisation. Pablo> # A good value for sigma might be 2. Pablo> I haven't evaluated it yet, since I need to stitch two large panos to Pablo> compare if things have improved. Its hard to tell from the preview in hugin ;-) Pablo> ------------------------------------------------------------------------- Pablo> Take Surveys. Earn Cash. Influence the Future of IT Pablo> Join SourceForge.net's Techsay panel and you'll get the chance to share your Pablo> opinions on IT & business topics through brief surveys - and earn cash Pablo> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV Pablo> _______________________________________________ Pablo> PanoTools-devel mailing list Pablo> Pan...@li... Pablo> https://lists.sourceforge.net/lists/listinfo/panotools-devel -- Daniel M. German "For indeed who is there alive that will not be swayed by his bias and partiality to Jonathan Swift -> the place of his birth?" http://turingmachine.org/ http://silvernegative.com/ dmg (at) uvic (dot) ca replace (at) with @ and (dot) with . |