I Bert Posted August 11, 2011 Report Share Posted August 11, 2011 Hi, i'm currently working on a dome and a globe projection with watchout 5. I was wondering if any one had done it, and if i can get help on how to set-up the stage for each of them. And i was told that the content need to be warp before being imported in watchout. Is that correct?? can you give me a little bit more information on that at the same time. thanks in advance. Quote Link to comment Share on other sites More sharing options...
Fredrik Svahnberg Posted August 12, 2011 Report Share Posted August 12, 2011 Hi Ian! WATCHOUT has built -in geometry correction, which is great for many off-axis and curved screen applications but when you want to project on a dome or a sphere, for example, the overlapping and edge-blending becomes very complex. And it is not only that, when you do not have a flat screen anymore, there might also be special requirements for the media content. Another important factor for a successful dome-project is a well designed set-up for the projectors and a good choice of optics. Please find my recommendation, for different types of WATCHOUT projection applications using geometry correction, below: 1) Keystone correction - The most basic form of geometry correction. Built-into most standard projectors. Typically compensates for off-axis projection on a flat screen. WATCHOUT's geometry correction is great for this. It even has a special mode for accurate "perspective-correction". 2) Curved screens - Typical examples include curved 180 and 360 degree screens. WATCHOUT's geometry correction is great for this as you only have the curvature in one direction. One axis is still straight and it is very easy to get a perfect alignment with manual geometry correction. No "pre-distorted/warped/mapped" media is required for "single-curved" screen projection. 3) Dome and sphere projection - This represent projection on any geometrically well-defined round or semi-round surface. For this we recommend to use a camera based auto-calibration system for measuring and feeding geometry, edge-blend and masking data into WATCHOUT. The solution require an external auto-calibration system but the process is automated. When you use auto-calibration with WATCHOUT the manual geometry correction and edge-blend functions are disabled but all other good features are working as you would expect. Projecting a 2-dimensional image on a 3-dimensional dome however requires "pre-mapped" media, such as polar-images, for example. Which "pre-mapping" (planar, cylindrical, spherical etc) should be chosen depends on the shape and on the "viewing focus" of your audience. 4) Projection mapping - Projected 3D mapping on buildings, cars, models or any arbitrary shape. Although the geometry correction and edge-blending for these type of projects can be well achieved with an auto-calibration system (adjustments can even be achieved with WATCHOUT's manual geometry correction), the advanced motion effects has to be "pre-mapped" in standard 3D or video post-production tools, The media content has to be produced in alignment with the template created from the actual projection surface or object. Apart from playback, synchronization and all the other good features in WATCHOUT, producers of 3D mapping projects often praises WATCHOUT for its ability to make final adjustments (of both media and geometry) in realtime. I hope this somewhat clarifies our position on this rather complex topic. Feedback and suggestions are most welcome. If you are intreated in the auto-calibration solution I mention above, please feel free contact me off-forum. Best regards, Fredrik Svahnberg Dataton Quote Link to comment Share on other sites More sharing options...
NNinja Posted August 14, 2011 Report Share Posted August 14, 2011 Tnx for the info, Fredrik! What auto-callibration system would you recommend? BR, Nikolay Kachamakov www.seg.bg Quote Link to comment Share on other sites More sharing options...
I Bert Posted August 15, 2011 Author Report Share Posted August 15, 2011 Thanks for the reply. it will help alot. One last question, for the dome (inside projection) would i have to do the same stage set-up and correction or it will be revers of the globe since it's inside? thanks Quote Link to comment Share on other sites More sharing options...
Fredrik Svahnberg Posted August 15, 2011 Report Share Posted August 15, 2011 Similar for the inside, yes. But as I wrote, the pre-mapping of media is important, depending on the content and if your audience "viewing focus" is closer to the "pole" or to the "equator" of your dome. Best regards, Fredrik Svahnberg Dataton Quote Link to comment Share on other sites More sharing options...
Andi Posted September 8, 2011 Report Share Posted September 8, 2011 Yes........what auto - calibration system would you recommend THX Quote Link to comment Share on other sites More sharing options...
Fredrik Svahnberg Posted September 8, 2011 Report Share Posted September 8, 2011 Please send an email to support@dataton.com and we will provide all the details. Best regards, Fredrik Svahnberg Dataton Quote Link to comment Share on other sites More sharing options...
Lawrence Posted October 25, 2011 Report Share Posted October 25, 2011 Hi Fredrik, I would also like to know more about the auto-calibration and projection mapping, most of our projection screen are curve or odd shapes and it takes me days to align a single screen with 6-projectors. I heard there are softwares to project some grids, then taking pictures of those grids and computer software can help to auto-calibrate... On the other hand, I know the basics of projection mapping, but here there are clients keep on asking this, I want to know more.. is there any reference that can help me to kick start? Thanks and Regards, Lawrence Quote Link to comment Share on other sites More sharing options...
Steve Farris Posted October 25, 2011 Report Share Posted October 25, 2011 Hello Fredrik, I am also interested in any input you have concerning auto-callibration. Perhaps you could share the details on the forum? Thanks! steve Quote Link to comment Share on other sites More sharing options...
assafyosef Posted August 30, 2014 Report Share Posted August 30, 2014 hi fredrik, is it possible to get more information about the auto calibration software? thank you, assaf Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.