{"id":382,"date":"2014-12-22T21:21:58","date_gmt":"2014-12-22T20:21:58","guid":{"rendered":"http:\/\/hannes.enjoys.it\/blog\/?p=382"},"modified":"2014-12-29T23:04:21","modified_gmt":"2014-12-29T22:04:21","slug":"partial-3d-model-of-comet-67pchuryumov-gerasimenko-through-photogrammetry","status":"publish","type":"post","link":"https:\/\/hannes.enjoys.it\/blog\/2014\/12\/partial-3d-model-of-comet-67pchuryumov-gerasimenko-through-photogrammetry\/","title":{"rendered":"Partial 3D model of Comet 67P\/Churyumov-Gerasimenko through photogrammetry"},"content":{"rendered":"<p>The ESA <a href=\"http:\/\/blogs.esa.int\/rosetta\/2014\/12\/19\/cometwatch-the-movie\/\">asked people to use their imagery<\/a> of the Comet 67P\/Churyumov-Gerasimenko. They released an <a href=\"http:\/\/sci.esa.int\/science-e\/www\/object\/doc.cfm?fobjectid=55167\">archive of photos<\/a> under the CC BY-SA. I took them, threw them into a trial version of <a href=\"http:\/\/www.agisoft.com\/features\/professional-edition\/\">Agisoft Photoscan<\/a> and generated a textured mesh in it. I then exported it as .obj-model, loaded it in Blender and exported it to a WebGL scene with <a href=\"https:\/\/www.blend4web.com\/en\/\">blend4web<\/a>. In other words, I just threw some programs at it.<\/p>\n<p><a href=\"http:\/\/hannes.enjoys.it\/geo\/67p.html\"><img loading=\"lazy\" decoding=\"async\" width=\"650\" height=\"435\" src=\"http:\/\/hannes.enjoys.it\/blog\/wp-content\/uploads\/67p_photoscan_blend2web.png\" alt=\"67p_photoscan_blend2web\" class=\"alignnone size-full wp-image-385\" srcset=\"https:\/\/hannes.enjoys.it\/blog\/wp-content\/uploads\/67p_photoscan_blend2web.png 650w, https:\/\/hannes.enjoys.it\/blog\/wp-content\/uploads\/67p_photoscan_blend2web-250x167.png 250w, https:\/\/hannes.enjoys.it\/blog\/wp-content\/uploads\/67p_photoscan_blend2web-120x80.png 120w\" sizes=\"auto, (max-width: 650px) 100vw, 650px\" \/><\/a><\/p>\n<p>You can see the result in your browser at <a href=\"http:\/\/hannes.enjoys.it\/geo\/67p.html\">http:\/\/hannes.enjoys.it\/geo\/67p.html<\/a> (~7 Megabytes). Be aware that while I used a lower quality version for this web version, the higher quality versions I tried were not actually that much &#8220;better&#8221;. The quality is limited by the resolution of the imagery and of course the fact that we do not have full coverage of a well-lit comet. Still totally fascinating and lots of fun to try.<\/p>\n<p>You can download a higher quality .obj at <a href=\"http:\/\/hannes.enjoys.it\/geo\/67p.7z\">http:\/\/hannes.enjoys.it\/geo\/67p.7z<\/a> (~12 Megabytes), you can import that straight into Blender.<\/p>\n<p>Now could someone turn the VisualSFM suite into something that is fun to use on Linux so I can try without Photoscan? ;)<\/p>\n<p>PS: I should add that I have not used Photoscan without ground control points for a completely foreign object before. Someone with more experience should be able to get a better result out of it. If you do and you read this, please share your wisdom!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The ESA asked people to use their imagery of the Comet 67P\/Churyumov-Gerasimenko. They released an archive of photos under the CC BY-SA. I took them, threw them into a trial version of Agisoft Photoscan and generated a textured mesh in it. I then exported it as .obj-model, loaded it in Blender and exported it to [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12,25,26],"tags":[],"class_list":["post-382","post","type-post","status-publish","format-standard","hentry","category-linux","category-photogrammetry","category-rosetta"],"_links":{"self":[{"href":"https:\/\/hannes.enjoys.it\/blog\/wp-json\/wp\/v2\/posts\/382","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hannes.enjoys.it\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hannes.enjoys.it\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hannes.enjoys.it\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hannes.enjoys.it\/blog\/wp-json\/wp\/v2\/comments?post=382"}],"version-history":[{"count":8,"href":"https:\/\/hannes.enjoys.it\/blog\/wp-json\/wp\/v2\/posts\/382\/revisions"}],"predecessor-version":[{"id":395,"href":"https:\/\/hannes.enjoys.it\/blog\/wp-json\/wp\/v2\/posts\/382\/revisions\/395"}],"wp:attachment":[{"href":"https:\/\/hannes.enjoys.it\/blog\/wp-json\/wp\/v2\/media?parent=382"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hannes.enjoys.it\/blog\/wp-json\/wp\/v2\/categories?post=382"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hannes.enjoys.it\/blog\/wp-json\/wp\/v2\/tags?post=382"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}