Warning: Constant FS_CHMOD_DIR already defined in /home/elizab17/public_html/wp-config.php on line 101

Warning: Constant FS_CHMOD_FILE already defined in /home/elizab17/public_html/wp-config.php on line 101

Warning: Constant FS_CHMOD_DIR already defined in /home/elizab17/public_html/wp-config.php on line 101

Warning: Constant FS_CHMOD_FILE already defined in /home/elizab17/public_html/wp-config.php on line 101

Warning: Cannot modify header information - headers already sent by (output started at /home/elizab17/public_html/wp-config.php:101) in /home/elizab17/public_html/wp-includes/rest-api/class-wp-rest-server.php on line 1831

Warning: Cannot modify header information - headers already sent by (output started at /home/elizab17/public_html/wp-config.php:101) in /home/elizab17/public_html/wp-includes/rest-api/class-wp-rest-server.php on line 1831

Warning: Cannot modify header information - headers already sent by (output started at /home/elizab17/public_html/wp-config.php:101) in /home/elizab17/public_html/wp-includes/rest-api/class-wp-rest-server.php on line 1831

Warning: Cannot modify header information - headers already sent by (output started at /home/elizab17/public_html/wp-config.php:101) in /home/elizab17/public_html/wp-includes/rest-api/class-wp-rest-server.php on line 1831

Warning: Cannot modify header information - headers already sent by (output started at /home/elizab17/public_html/wp-config.php:101) in /home/elizab17/public_html/wp-includes/rest-api/class-wp-rest-server.php on line 1831

Warning: Cannot modify header information - headers already sent by (output started at /home/elizab17/public_html/wp-config.php:101) in /home/elizab17/public_html/wp-includes/rest-api/class-wp-rest-server.php on line 1831

Warning: Cannot modify header information - headers already sent by (output started at /home/elizab17/public_html/wp-config.php:101) in /home/elizab17/public_html/wp-includes/rest-api/class-wp-rest-server.php on line 1831

Warning: Cannot modify header information - headers already sent by (output started at /home/elizab17/public_html/wp-config.php:101) in /home/elizab17/public_html/wp-includes/rest-api/class-wp-rest-server.php on line 1831
{"id":106,"date":"2016-04-13T02:45:23","date_gmt":"2016-04-13T02:45:23","guid":{"rendered":"http:\/\/elizabethgrab.com\/?p=106"},"modified":"2018-03-20T19:23:37","modified_gmt":"2018-03-20T23:23:37","slug":"experimenting-with-3d-scanning","status":"publish","type":"post","link":"https:\/\/elizabethgrab.com\/digital-humanities\/experimenting-with-3d-scanning\/","title":{"rendered":"Experimenting with 3D Scanning"},"content":{"rendered":"

Autodesk 123D Catch desktop & smart phone app<\/h5>\n
Last week, we visited the Ackland Museum to use one of their objects for our first foray into 3D scanning.\u00a0 I chose a squat, spouted object for my first project<\/a>.<\/p>\n
<\/iframe><br \/>\nThe phone app is a huge help in terms of starting out with lens distance and the number of photos required for a baseline.\u00a0 There is a 70 photo cut off, so don’t get too enthusiastic if you’re using the app.\u00a0 But if you follow their model (the blue segments), you get the right number with a sufficient amount of overlap to construct the 3D render.<\/p>\n<figure id=\"attachment_110\" aria-describedby=\"caption-attachment-110\" style=\"width: 213px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/elizabethgrab.com\/wp-content\/uploads\/2016\/04\/screencap_123D_App.png\" rel=\"attachment wp-att-110\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-110\" src=\"https:\/\/elizabethgrab.com\/wp-content\/uploads\/2016\/04\/screencap_123D_App-200x300.png\" alt=\"screencap_123D_App\" width=\"213\" height=\"320\" srcset=\"https:\/\/elizabethgrab.com\/wp-content\/uploads\/2016\/04\/screencap_123D_App-200x300.png 200w, https:\/\/elizabethgrab.com\/wp-content\/uploads\/2016\/04\/screencap_123D_App.png 640w\" sizes=\"(max-width: 213px) 85vw, 213px\" \/><\/a><figcaption id=\"caption-attachment-110\" class=\"wp-caption-text\">This is a sculpture from home, nothing so fancy as an Ackland object. But it lets you see how the app works.<\/figcaption><\/figure>\n<p>But it’s certainly a lesson in patience. There are several stages of upload that require users to dredge up the patience we used to exercise when dial-up was our only option.\u00a0 JJ supposed that the wait time might be a part of the way the site processes the photos\u2014maybe it’s constructing the model as it’s uploading the photo.\u00a0 If you have internet connectivity issues (the struggle is real, even on our university network), don’t worry too much\u2014I walked too far from the building while it was ‘Finishing,’ and the app asked me if I wanted to continue on my data plan.\u00a0 Even still, it stayed on that ‘Finishing’ screen for <em>hours.<\/em>\u00a0 I finally just let the phone alone and went to bed.\u00a0 When I opened the app up the next day, it offered me the option of publishing the upload, which went speedily.\u00a0 So lesson learned: don’t attempt a project under time pressure.<\/p>\n<p>The Autodesk application is meant as an intro to 3D scanning and potential printing (123D Make).\u00a0 So there’s a limit as to editing the model after it’s been uploaded.\u00a0 Pretty much all you can do is add tags and a description without any tools to manipulate the model itself.\u00a0 You can download several different file formats, though.\u00a0 It also allows you to share the project on various social media platforms or embed it (as seen in the first image).\u00a0 If you’re new to 3D scanning, this is definitely the way to start.<\/p>\n<h5>Agisoft PhotoScan (& Sketchfab)<\/h5>\n<p>PhotoScan, on the other hand, is better either for beginners with the option of a tutorial or for those with a little more familiarity with image manipulation software.\u00a0 The learning curve isn’t as steep as with Adobe products, however, since the basics of what you need to do (in the order they need doing) show up on the ‘Workflow’ dropdown of the menu.\u00a0 As you complete each step, the next steps are no longer greyed out.\u00a0 For each task completed, more of the toolbar is made available to you.\u00a0 For example, once the photos are aligned, the dense cloud constructed and the mesh build, you can view the various underlying structures of the model.\u00a0 To help fill in the gaps, you can use Tools>Mesh>Close Holes and the software will interpolate what’s missing. The best part, though, is that the default setting for all of the stages result in a respectable model that renders non-reflective surfaces and textures beautifully.\u00a0 For example, the model we constructed during class involved a brick wall, and it really did look like an actual brick wall by the time we finished, and just on the default (medium) settings.\u00a0 The only caveat: Make sure you’re working on a computer with a a good bit of memory behind it\u2014the speed and capability of the processing is limited otherwise.<\/p>\n<p>Once you have the model as you like it, you can use image editing software to alter the aesthetics of the model.\u00a0 DO NOT make any alteration (including cropping) to the photos in the process of taking them nor before aligning them.\u00a0 Once the photos are aligned, you can crop them in the program to hone in on the object.\u00a0 For the amount of light and sharpness, export the material file and .jpg.\u00a0 Edit the .jpg in your image editing software (it will look like an unrecognizable blob\u2014just go with it) and then feed it back into the model for a reapplication of the texture by going to Tools>Import>Import Texture.<\/p>\n<p>Once the model is perfected, you have the option of several export options.\u00a0 Did you know that Adobe Reader lets users move around a 3D model?\u00a0 It’s a fun and approachable option.\u00a0 The Wavefront obj file option allows you to to save without compression, though the file size is large.<\/p>\n<h6><a href=\"https:\/\/elizabethgrab.com\/wp-content\/uploads\/2016\/04\/experiment-with-PhotoScan-1.jpg\" rel=\"attachment wp-att-116\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-116\" src=\"https:\/\/elizabethgrab.com\/wp-content\/uploads\/2016\/04\/experiment-with-PhotoScan-1-1024x640.jpg\" alt=\"experiment with PhotoScan\" width=\"840\" height=\"525\" srcset=\"https:\/\/elizabethgrab.com\/wp-content\/uploads\/2016\/04\/experiment-with-PhotoScan-1-1024x640.jpg 1024w, https:\/\/elizabethgrab.com\/wp-content\/uploads\/2016\/04\/experiment-with-PhotoScan-1-300x188.jpg 300w, https:\/\/elizabethgrab.com\/wp-content\/uploads\/2016\/04\/experiment-with-PhotoScan-1-768x480.jpg 768w, https:\/\/elizabethgrab.com\/wp-content\/uploads\/2016\/04\/experiment-with-PhotoScan-1-1200x750.jpg 1200w, https:\/\/elizabethgrab.com\/wp-content\/uploads\/2016\/04\/experiment-with-PhotoScan-1.jpg 1440w\" sizes=\"(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 62vw, 840px\" \/><\/a>For this model:<\/h6>\n<p>The photos that align properly show up with green check marks.\u00a0 I think part of the issue with this model is that I uploaded the photos slightly out of order, thus missing the full scan of the little Frenchman’s beret.\u00a0 That, the uneven lighting and the poorly contrasted background all contributed to the editing problems.\u00a0 If the model were better, it would be worth spending time with the magic wand or lasso tools to edit closer to the sculpture.\u00a0 For lighting, try to get neutral lighting that casts minimal shadows.\u00a0 Bright or harsh lighting not recommended.\u00a0 If you’re shooting outdoors, aim for cloudy days.<\/p>\n<p>Sketchfab is a means of publicly sharing projects from 3D rendering programs.\u00a0 If you have paid for an Agisoft account, you can upload projects directly to Sketchfab.\u00a0 My account is super boring, since the free trial of PhotoScan won’t allow file export or saving.\u00a0 But <a href=\"https:\/\/sketchfab.com\/rla-archaeology\" target=\"_blank\" rel=\"noopener\">RLA Archaeology<\/a> has a fascinating and active account, so take a look there for a sampling of what Sketchfab has to offer as a public gallery of projects.<\/p>\n<h5>3D Printing<\/h5>\n<p>The process of creating the scan and watching such a textured image develop was gratifying\u2014that scan being the one that we created in class with the brick, and not reproduced here.\u00a0 I’m certain that watching the model go through the 3D printing process would be equally fascinating.\u00a0 But the final product may be less satisfying.\u00a0 Most printers produce those heavily ringed models that require sanding before they look and feel more like a whole\u2014rather than composite\u2014object.<\/p>\n<p>What’s really cool about 3D printing, though, you can use such an assortment of materials with which to print.\u00a0 For example, World’s Advanced Saving Project is building prototypes for <a href=\"http:\/\/thenewstack.io\/wasp-3d-printing-affordable-mud-housing-for-the-developing-world\/\" target=\"_blank\" rel=\"noopener\">affordable housing 3D printed from mud<\/a>.\u00a0 Some artists are constructing <a href=\"https:\/\/cfileonline.org\/design-alessandro-zambelli-mutates-beetle-create-maggiolina-lamp\/\" target=\"_blank\" rel=\"noopener\">ceramics from 3D models<\/a> using clay (basically more refined mud).\u00a0 Still others are using <a href=\"https:\/\/www.bathsheba.com\/sculpt\/\" target=\"_blank\" rel=\"noopener\">metals for their work<\/a>.\u00a0 The possibilities for art, architecture and material culture are overwhelming.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Autodesk 123D Catch desktop & smart phone app Last week, we visited the Ackland Museum to use one of their objects for our first foray into 3D scanning.\u00a0 I chose a squat, spouted object for my first project.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[24,23],"_links":{"self":[{"href":"https:\/\/elizabethgrab.com\/wp-json\/wp\/v2\/posts\/106"}],"collection":[{"href":"https:\/\/elizabethgrab.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/elizabethgrab.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/elizabethgrab.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/elizabethgrab.com\/wp-json\/wp\/v2\/comments?post=106"}],"version-history":[{"count":16,"href":"https:\/\/elizabethgrab.com\/wp-json\/wp\/v2\/posts\/106\/revisions"}],"predecessor-version":[{"id":383,"href":"https:\/\/elizabethgrab.com\/wp-json\/wp\/v2\/posts\/106\/revisions\/383"}],"wp:attachment":[{"href":"https:\/\/elizabethgrab.com\/wp-json\/wp\/v2\/media?parent=106"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/elizabethgrab.com\/wp-json\/wp\/v2\/categories?post=106"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/elizabethgrab.com\/wp-json\/wp\/v2\/tags?post=106"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}