Comments on: PhotoSynth Viewer using Three.js http://www.visual-experiments.com/2011/06/20/photosynth-viewer-using-three-js/ ASTRE Henri experiments with Ogre3D and web stuff Tue, 22 Aug 2017 10:32:15 +0000 hourly 1 http://wordpress.org/?v=3.1.2 By: Sendoa http://www.visual-experiments.com/2011/06/20/photosynth-viewer-using-three-js/comment-page-1/#comment-57525 Sendoa Mon, 13 Jan 2014 16:22:12 +0000 http://www.visual-experiments.com/?p=1772#comment-57525 Hi Henri, I have started recently to try XB PointStream and three.js and I wanted to ask you if the method used by XB PointStream to render big point cloud is somehow performed in three.js, or if you would suggest using XB PointStream for big data instead of three.js. Thanks in advance Hi Henri,

I have started recently to try XB PointStream and three.js and I wanted to ask you if the method used by XB PointStream to render big point cloud is somehow performed in three.js, or if you would suggest using XB PointStream for big data instead of three.js.

Thanks in advance

]]> By: Google Chrome PhotoSynth Viewer using Three.js » Visual-Experiments.com http://www.visual-experiments.com/2011/06/20/photosynth-viewer-using-three-js/comment-page-1/#comment-6196 Google Chrome PhotoSynth Viewer using Three.js » Visual-Experiments.com Thu, 21 Jul 2011 15:48:41 +0000 http://www.visual-experiments.com/?p=1772#comment-6196 [...] finally back from holiday and found enough time to update the Google Chrome extension with my new PhotoSynth Viewer based on [...] [...] finally back from holiday and found enough time to update the Google Chrome extension with my new PhotoSynth Viewer based on [...]

]]> By: rperrot http://www.visual-experiments.com/2011/06/20/photosynth-viewer-using-three-js/comment-page-1/#comment-6105 rperrot Sun, 10 Jul 2011 07:48:03 +0000 http://www.visual-experiments.com/?p=1772#comment-6105 No I didn't try SFMToolkit. I'm on a mac computer with an ATI card so I've got two problems ! ;) No I didn’t try SFMToolkit. I’m on a mac computer with an ATI card so I’ve got two problems ! ;)

]]> By: Henri http://www.visual-experiments.com/2011/06/20/photosynth-viewer-using-three-js/comment-page-1/#comment-6102 Henri Sun, 10 Jul 2011 01:31:37 +0000 http://www.visual-experiments.com/?p=1772#comment-6102 @rperrot: I am currently in holiday in Mexico so I don t have acces to my computer (until 14 July). I will make the bundler version with PBA support available, this way you will know the kind of results you can have with this version. I have trouble of convergence with my dataset (that are working with sba): meaning the 100 first cameras are correctly registered and then the remaining cameras are not... Thanks for sharing the map of your creation! BTW do you have tried my Bundler Toolkit? SFMToolkit use SiftGPU which is really fast if you have an Nvidia card (open-source: hosted on github). @rperrot: I am currently in holiday in Mexico so I don t have acces to my computer (until 14 July). I will make the bundler version with PBA support available, this way you will know the kind of results you can have with this version. I have trouble of convergence with my dataset (that are working with sba): meaning the 100 first cameras are correctly registered and then the remaining cameras are not… Thanks for sharing the map of your creation! BTW do you have tried my Bundler Toolkit? SFMToolkit use SiftGPU which is really fast if you have an Nvidia card (open-source: hosted on github).

]]> By: rperrot http://www.visual-experiments.com/2011/06/20/photosynth-viewer-using-three-js/comment-page-1/#comment-6096 rperrot Sat, 09 Jul 2011 08:01:17 +0000 http://www.visual-experiments.com/?p=1772#comment-6096 (Désolé pour la question/réponse en français, mais je trouve toujours curieux de poser une question en anglais à un français, même en conférence ;) ) So there's no quality difference between float and double version ? What about performance gain ? You also said that you've got erroneous point cloud, what does this means ? awful reconstruction ? many points invalid but reconstruction was ok ? some points invalid but reconstruction seams ok ? I ask you these questions because BA is the only step that is not parallelised on my bundler process. I've got a multithread sift (libsiftfast), implemented a multithread keymatching (it was easy). So I was searching for a multithread implementation of BA. I also got some code for parsing bundle.out and making a single ply file containing only reconstructed points. I skip camera informations but you could recover it very easily (I commented the lines corresponding to it). You could get this code here : https://bv.univ-poitiers.fr/access/content/user/rperrot/Code/BundleToPly.zip Finally I made a map of some of reconstruction I made using bundler and cmvs : http://maps.google.com/maps/ms?msid=209109955462085769047.0004a713b576be982c17e&msa=0 (Désolé pour la question/réponse en français, mais je trouve toujours curieux de poser une question en anglais à un français, même en conférence ;) )

So there’s no quality difference between float and double version ? What about performance gain ?

You also said that you’ve got erroneous point cloud, what does this means ? awful reconstruction ? many points invalid but reconstruction was ok ? some points invalid but reconstruction seams ok ?

I ask you these questions because BA is the only step that is not parallelised on my bundler process. I’ve got a multithread sift (libsiftfast), implemented a multithread keymatching (it was easy). So I was searching for a multithread implementation of BA.

I also got some code for parsing bundle.out and making a single ply file containing only reconstructed points. I skip camera informations but you could recover it very easily (I commented the lines corresponding to it). You could get this code here :

https://bv.univ-poitiers.fr/access/content/user/rperrot/Code/BundleToPly.zip

Finally I made a map of some of reconstruction I made using bundler and cmvs :

http://maps.google.com/maps/ms?msid=209109955462085769047.0004a713b576be982c17e&msa=0

]]> By: Henri http://www.visual-experiments.com/2011/06/20/photosynth-viewer-using-three-js/comment-page-1/#comment-6055 Henri Tue, 05 Jul 2011 22:04:43 +0000 http://www.visual-experiments.com/?p=1772#comment-6055 @all: rperrot is wondering if my issue with PBA is related to the float precision only of the GPU version of PBA. @rperrot: I've compiled 6 versions of Bundler with PBA support (x64/x86) and GPU float, CPU float/double. I've got the same issue even with the CPU double version so I don't think that it is related to this. @all: rperrot is wondering if my issue with PBA is related to the float precision only of the GPU version of PBA.

@rperrot: I’ve compiled 6 versions of Bundler with PBA support (x64/x86) and GPU float, CPU float/double. I’ve got the same issue even with the CPU double version so I don’t think that it is related to this.

]]> By: rperrot http://www.visual-experiments.com/2011/06/20/photosynth-viewer-using-three-js/comment-page-1/#comment-6035 rperrot Sun, 03 Jul 2011 07:46:11 +0000 http://www.visual-experiments.com/?p=1772#comment-6035 Henri, tu indiques que PBA te donne des points incorrects, ne serait-ce pas un problème de précision ? (la bibliothèque est compilée en float plutôt qu'en double), Et de plus c'est précisé à la fois dans le papier et dans le manuel. Est-ce que ce nombre de points incorrects est important ? (sous entendu est-ce que ça peut limiter l'utilisation de cmvs derrière ?) Henri, tu indiques que PBA te donne des points incorrects, ne serait-ce pas un problème de précision ? (la bibliothèque est compilée en float plutôt qu’en double), Et de plus c’est précisé à la fois dans le papier et dans le manuel. Est-ce que ce nombre de points incorrects est important ? (sous entendu est-ce que ça peut limiter l’utilisation de cmvs derrière ?)

]]> By: Henri http://www.visual-experiments.com/2011/06/20/photosynth-viewer-using-three-js/comment-page-1/#comment-5998 Henri Tue, 28 Jun 2011 17:42:45 +0000 http://www.visual-experiments.com/?p=1772#comment-5998 @Pierre: Indeed, I`m also interested in making a bundle.out file parser to be able to read point cloud and camera position from Bundler! @Joey: Thanks for pointing me to YQL! I`m currently in holiday so I won`t be able to make this demo live until my return (14 July). But don`t worry You will be able to try this demo! I also want to update my Google Chrome extension with this new viewer (this way YQL won`t be necessary). @Pierre: Indeed, I`m also interested in making a bundle.out file parser to be able to read point cloud and camera position from Bundler!
@Joey: Thanks for pointing me to YQL! I`m currently in holiday so I won`t be able to make this demo live until my return (14 July). But don`t worry You will be able to try this demo! I also want to update my Google Chrome extension with this new viewer (this way YQL won`t be necessary).

]]> By: Joey http://www.visual-experiments.com/2011/06/20/photosynth-viewer-using-three-js/comment-page-1/#comment-5997 Joey Tue, 28 Jun 2011 10:56:54 +0000 http://www.visual-experiments.com/?p=1772#comment-5997 Hey, really stunning demo! You can easily do cross domain requests via YQL or you could set up your own appengine project to just reflect your requests. I'd really like to see this thing live. Hey, really stunning demo! You can easily do cross domain requests via YQL or you could set up your own appengine project to just reflect your requests. I’d really like to see this thing live.

]]> By: Pierre http://www.visual-experiments.com/2011/06/20/photosynth-viewer-using-three-js/comment-page-1/#comment-5946 Pierre Tue, 21 Jun 2011 19:04:59 +0000 http://www.visual-experiments.com/?p=1772#comment-5946 Impressive ! It could be cool to have the same working on PLY files from disk ;) with an additional files for images and camera position ;) Impressive !
It could be cool to have the same working on PLY files from disk ;) with an additional files for images and camera position ;)

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