tag:blogger.com,1999:blog-4458817758216594734.post6685428856887366122..comments2024-02-05T10:03:41.331+01:00Comments on ATOR: Extreme SfM: underwater archaeologyLuca Bezzihttp://www.blogger.com/profile/01679160024950021679noreply@blogger.comBlogger10125tag:blogger.com,1999:blog-4458817758216594734.post-35335695048771561762013-04-08T17:49:22.489+02:002013-04-08T17:49:22.489+02:00Hi Luca. I also prefer photos, but the idea of rec...Hi Luca. I also prefer photos, but the idea of reconstruct archaeological contexts/objects using video data is attractive. Specially if you can use old film or tv tapes digitalizations. Some films use lot of traveling techniques and this is probably good advantage to SfM processing:<br /><br />i.e.) Viaggio in Italia (1954)<br /><br />http://www.youtube.com/watch?v=aUH4mjpxZys <br /><br />Although I also use ffmpeg, VLC GUI was my choice because it's already included in ArcheOS and don't require command line operations (that may be puzzling for some new GNU/Linux users). <br /><br />The video resolution is very crappy but i would send it anyway. <br /><br />rgaidaoAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-4458817758216594734.post-10061895723591513992013-04-08T16:33:58.557+02:002013-04-08T16:33:58.557+02:00Hi Ricardo,
personally I prefer to use normal pict...Hi Ricardo,<br />personally I prefer to use normal pictures when I work with SfM (it is less time consuming and more accurate, because the photos are specifically taken for this issue), but I had good results also with video. The reconstruction of the underwater tree was done by Alessandro and me with SfM directly from a movie (GoPro Hero), just we used ffmpeg to extract the single photo. I think your tutorial is interesting, showing another way to extract images from a clip. If you want to post it, I think it will be useful for ATOR readers.<br />PS, if you want, you can send us the picture you get, so that we can also try to reconstruct the model and compare it with your), or, even better, you can send the original clip. Ciao.Luca Bezzihttps://www.blogger.com/profile/01679160024950021679noreply@blogger.comtag:blogger.com,1999:blog-4458817758216594734.post-88948358628867534492013-04-08T00:26:39.494+02:002013-04-08T00:26:39.494+02:00Hi Viktor and Luca. I created a small video tutori...Hi Viktor and Luca. I created a small video tutorial showing how to auto extract image stills from a video using VLC. The goal is to obtain a large number of images - automatically taken with regular time intervals - suitable to the SfM video process illustrated by Cicero.<br /><br />http://vimeo.com/63525731<br /><br />The idea is good, but I didn't like the results. The SfM software require each image EXIF data to obtain good results.<br /><br />Thats the reason I didn't post the video. It would be great if Viktor could explain us better this crucial step to create a more detailed tutorial.<br /><br />rgaidao Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4458817758216594734.post-11018427015733840462013-03-25T23:15:27.289+01:002013-03-25T23:15:27.289+01:00hi, luca,
nice examples! in my diploma thesis i sh...hi, luca,<br />nice examples! in my diploma thesis i show a workflow to use SfM on the monitoring of underwaterarchaelogical sites by the example of the prehistoric piledwellings, and i find out that it is possible to detect changes in the condition and form of just a few millimeters...<br /><br />if you want, i can write something about that, and, especially, about how to extract pics from a movie and how to maniopulate the exif, which is very important...<br /><br />greatings,<br />viktorAnonymoushttps://www.blogger.com/profile/05633703557239836411noreply@blogger.comtag:blogger.com,1999:blog-4458817758216594734.post-84723070309472117512013-03-25T21:42:38.315+01:002013-03-25T21:42:38.315+01:00Yes, it was useful. And inspiring so I am now doin...Yes, it was useful. And inspiring so I am now doing some tests with the images I showed you in Lund. But during next month (I hope) I will do a new dive and take better photos...anders gutehallhttps://www.blogger.com/profile/14213718116014929154noreply@blogger.comtag:blogger.com,1999:blog-4458817758216594734.post-37444060162221483652013-03-25T19:47:25.595+01:002013-03-25T19:47:25.595+01:00Thank you Luca...I was particularly interested in ...Thank you Luca...I was particularly interested in it, during the lessons at CNR last June: I'll wait for the results of next texts! Congratulations. Manurithttps://www.blogger.com/profile/10197812627108500774noreply@blogger.comtag:blogger.com,1999:blog-4458817758216594734.post-59204975286275681652013-03-25T14:16:18.657+01:002013-03-25T14:16:18.657+01:00Thank you Cicero, hopefully soon we will do new te...Thank you Cicero, hopefully soon we will do new test to better develop this methodology for underwater archeology.Luca Bezzihttps://www.blogger.com/profile/01679160024950021679noreply@blogger.comtag:blogger.com,1999:blog-4458817758216594734.post-4763120918989685882013-03-25T14:15:34.224+01:002013-03-25T14:15:34.224+01:00Thank you Anders, I am glad you read this post, I ...Thank you Anders, I am glad you read this post, I hope it was useful.Luca Bezzihttps://www.blogger.com/profile/01679160024950021679noreply@blogger.comtag:blogger.com,1999:blog-4458817758216594734.post-46603955479291644652013-03-25T11:26:55.786+01:002013-03-25T11:26:55.786+01:00Amazing result from that material and interesting ...Amazing result from that material and interesting blogpost, thank you!anders gutehallhttps://www.blogger.com/profile/14213718116014929154noreply@blogger.comtag:blogger.com,1999:blog-4458817758216594734.post-84543767862592731832013-03-25T00:15:31.178+01:002013-03-25T00:15:31.178+01:00Really interesting, congratz!Really interesting, congratz!cogitas3dhttps://www.blogger.com/profile/16930626141843410170noreply@blogger.com