{"id":741,"date":"2011-08-07T10:07:18","date_gmt":"2011-08-07T15:07:18","guid":{"rendered":"http:\/\/analyze3d.com\/Site\/?page_id=741"},"modified":"2014-11-15T12:08:35","modified_gmt":"2014-11-15T17:08:35","slug":"anaglyph-movies","status":"publish","type":"page","link":"https:\/\/analyze3d.com\/Site\/anaglyph-movies\/","title":{"rendered":"Anaglyph Movies"},"content":{"rendered":"

As hard as Anaglyph stills are to capture and produce, Anaglyph movies offer the same difficulties as well as a host of additional challenges.<\/p>\n

First, acquiring two movie cameras is usually more expensive than purchasing\"Anaglyph two still cameras.\u00a0 Though it is possible to capture an anaglyph using one video camera and a beam-splitter, the resolution of camcorders is generally low enough to require separate devices for capturing the two views.\u00a0 Secondly, intermediate video products produced at each stage can be quite large.\u00a0 Still images are on the order of a few megabytes.\u00a0 Videos are often sized closer to the gigabyte range and beyond even with compression.\u00a0 This is compounded when you consider the number of steps that the source videos need to undergo before arriving as the final product you see.<\/p>\n

Consider the following.\u00a0 Two separate video sources must be captured and transferred to a computer.\u00a0 Each source must first be deinterlaced.\u00a0 The results must be combined into one Anaglyph video.\u00a0 Sound from one or both video sources must be added to the movie.\u00a0 The final video is then scaled down and converted to a web friendly format before uploading to an Internet site.\u00a0 Compression can be used, but only at the highest quality settings, or the anaglyph will not be convincing.\u00a0 Remember, this technique relies on precise coloring and displacement of two blended frames.<\/p>\n

Some of these steps can be combined, but only if the conversion software is flexible.\u00a0 Usually, however, even more steps are required.\u00a0 For example, human eye separation is usually around 2.5 inches.\u00a0 Getting two video camera lenses this close together is quite a challenge.\u00a0 One way to solve this dillema is to flip one of the cameras for a closer fit.\u00a0 The custom rig that I built shown on the next page uses this technique to bring the two camera lenses closer together.\u00a0 A drawback of this method is that one of the videos needs to be flipped during as part of the deinterlacing process, or as a separate stage.<\/p>\n

If a beam-splitter is not used, then the biggest challenge in creating an Anaglyph video still remains.\u00a0 Frames taken by the video cameras are captured at about 1\/30th of a second apart.\u00a0 While this seems very short, the truth is that if two cameras are not synchronized precisely, video of subjects in motion cannot be turned into a convincing anaglyph.\u00a0 The rig below utilizes a dedicated device called a LANC Shepard<\/a> to synchronize the two cameras.\u00a0 I have found that a synchronization of better than 1\/600th of a second is required for success given subjects with average motion.\u00a0 To capture highly dynamic stereo scenes, finer synchronization is required.<\/p>\n

In order to increase the odds that two video cameras are sufficiently synchronized for motion capture, they should be of the same make and model.\u00a0 It helps if they are made from the same production batch.\u00a0 Still, compensation for inconsistencies within the electronic parts may be performed by the synchronization device.\u00a0 For example, the LANC Shepard<\/a> can be instructed to immediately turn on the slave camera when the master camera is turned on.\u00a0 Further, it can delay the slave startup timing by a user-specified amount if synchronizing the two devices requires compensation.<\/p>\n

Remember to zoom out to the same macro view on both cameras before capturing the video.\u00a0 Image stabilization can ruin the stereo effect, and needs to be turned off.\u00a0 Also, use an object with a flat surface (e.g., a CD) to check that both lenses are perfectly aligned with each other.<\/p>\n

The custom rig built for stereo video capture using two Sony DCR-SR100s and a LANC Shepard<\/a> is shown below.\u00a0 The two cameras weigh a lot together making filming awkward.\u00a0 The LANC Shepard<\/a> is connected to both cameras, and faces the photographer for easy inspection.\u00a0 A level (bubble in liquid) is present to make sure the video is taken level to the ground.\u00a0 A screwdriver handle is mounted at the rig base for easy carrying and the frame has been dipped in a black liquid that solidifies into a rubbery surface well suited for grip.\u00a0 The wires connect the master and slave cameras to the synchronization device.<\/p>\n

\"Stereo<\/p>\n

The back of the stereo rig is shown below:<\/p>\n

\"Stereo<\/p>\n

Anaglyph Movie – An Example<\/h3>\n

An example of processed output from the Stereo Rig is shown below.\u00a0 This is a web-friendly low-resolution version of the stereo video.\u00a0 You will need red\/cyan glasses to view this video correctly.\u00a0 The red colored lens should be on the left side for proper viewing:<\/p>\n

<\/object><\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

As hard as Anaglyph stills are to capture and produce, Anaglyph movies offer the same difficulties as well as a host of additional challenges. First, acquiring two movie cameras is […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-741","page","type-page","status-publish","hentry"],"yoast_head":"\nAnaglyph Movies - Hillel Steinberg's Immersive Photography<\/title>\n<meta name=\"description\" content=\"Hillel's Steinberg's Anaglyph Photography\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/analyze3d.com\/Site\/anaglyph-movies\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Anaglyph Movies - Hillel Steinberg's Immersive Photography\" \/>\n<meta property=\"og:description\" content=\"Hillel's Steinberg's Anaglyph Photography\" \/>\n<meta property=\"og:url\" content=\"https:\/\/analyze3d.com\/Site\/anaglyph-movies\/\" \/>\n<meta property=\"og:site_name\" content=\"Hillel Steinberg's Immersive Photography\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/hillelstein\" \/>\n<meta property=\"article:modified_time\" content=\"2014-11-15T17:08:35+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/analyze3d.com\/images\/AnaglyphGlasses.gif\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@hytel\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/analyze3d.com\\\/Site\\\/anaglyph-movies\\\/\",\"url\":\"https:\\\/\\\/analyze3d.com\\\/Site\\\/anaglyph-movies\\\/\",\"name\":\"Anaglyph Movies - 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