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FULL SCREEN PANORAMAS
by Hans Nyberg |
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| Also read my page about my new Canon D60 and Sigma 8 mm Fisheye. Added 19.09.02 | |||||
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Good News 0606 2002 |
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| In VR Aarhus you can see Full Screen Panoramas in sizes which adapts to your screen. VR Aarhus was the first site on the Web with Full Screen panoramas ( I started in 1999 ) but several other sites have now also introduced it. At Virtual Parks you can see panoramas in close to Full Screen and Charles Evans uses it in a similar way as I do. Bostjan Burger in Slovenia has made a special Full Screen page inspired by me and there are several others you can find at my site WorldWide VR Panoramas which is a linksite with links to panoramas WorldWide. I also present a QTVR Full Screen Panorama every week (14 in the archive as per 0606 2002) I have checked performance of my Full Screen panoramas up to 1600x1200 resolution on a 21" screen. The people I demonstrate it for are amazed and the larger screen size the more positive the reactions are.
How do you make Full Screen panoramas which pan smoothly ? |
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The source file for this full screen panorama in VR Aarhus is 3936x1932 It is stitched from 8 full size fisheye images (Pentax Zoom Fisheye 17-28) In VR Aarhus 5 of the 6 panoramas from Aarhus Festival are hand held. Look in EVENTS I have made a specially optimized panorama of No 30 in VR Aarhus to show how sharp it actually can become. In Vr Aarhus the file is 780 kb. This file is 1500 kb and it is made as a Cubic panorama with restriction of the view. It is also made with High Quality panning which I do not use in VR Aarhus, see 2 below. This panorama will expand to your screen size what ever it may bee. You should note that you can drag the window and the panorama to a smaller size. I f you see "waving" drag it down to a size where it disappears. That is the size YOUR computer can view with High Quality panning setting. View Full Screen Panorama from Aarhus Festival the Concert Hall
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1. Never use Sorensen compression. Sorensen decompresses very slowly and you can get very jerky panoramas on some systems. 2 . Use medium (50%) Quality setting for panning. On slow computers High setting will cause "waving" or they can be very hard to move. I only use the High Quality for smaller panos max 350x500 pixels display. 3. Use as few tiles as possible. With JPG compression or Cinepack you can make a movie with 1 single tile. 4. Make sure that the source file is divisible by the number of tiles used. VR Worx will make a movie also with other sizes. 5. Make a Cubic Panorama from your cylindrical pano. Convert the cylinder to spheric with panotools. Ad black to make it a full spheric and use QTVRMakeCubic to make a cubic. Restrict tilt to the degree of your pano and you will not see the black. Black will only ad a few kb in size when you compress it with JPG. |
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News 0606 2002 The problems described below with Sorensen compression and MacOS 9 is solved in the new QuickTime 6 preview |
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The jerkyness you can see around on the net is in most cases caused because to many tiles are used especially with Sorensen compression. Cubic Panoramas only have 4 tiles horizontally as default , and they are very smooth. Below are different movies made from the file above. |
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The movies are 800x600 they will open in a new window. Movie size is 644 kb to 1.3 mb Use 1024x768 screen. Remember to close the window before opening a new movie. 1. fullscreen1x12q_med_jpg.mov 644 kb My standard setting for FULL SCREEN panoramas. In VR Aarhus they open in a window which expands to the size of the Screen of your computer. The size is set to 100 % width and 97% Height (the rest is to the text in the top) 2. fullscreen1x1q_med_jpg.mov 1 single tile. You have to download the whole movie before you can see it. If you have to little memory for your browser you get a broken icon. This is because you have to keep the movie uncompressed in the browser. Explorer needs 30-40 mb. Because you have it uncompressed from the start it moves very smooth. 3. fullscreen4x96q_med_jpg.mov Maximum tiles with jpg it still works 4. fullscreen1x24q_med_cine.mov 1x24 tiles I believe this is the default setting in QTVRAS. 5. fullscreen1x24q_med_soren.mov The same with Sørensen compression. You have to move it around all 360 degree before it plays smooth. Below are 3 movies from a 2112 pixels sourcefile. about 300 kb movie size. 7. 300x400_1x24q_med_soren.mov 8. 300x400_4x48q_med_soren.mov This movie is on my Mac very difficult to move around the first time. It gets stuck at each tile. When you have completed a 360 degree turn around it plays OK. My computer is MAC G3 233 mhz, 512 mb ram Mac OS 9.1. |
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Problems with jerky panoramas which do not pan smoothly before you have panned all the way round once has been discussed again and again on the QuickTime VR list. It can be solved simply by recompressing the movie to JPG in any of the programs which can do this. I have tried VR Worx opening the movie as a scene and recompressing it. Updated 081101: I tested the page in my Virtual PC with both quickTime 4.1 and 5.02 and to my surprise panorama no 8 above had no jerky movements with this very low performance configuration. My Virtual PC is compatible with a 133 mhz PC. This made me test it on Mac OS 8.6 which I have on the same Computer as 9.1. No 8 was slightly jerky but I had no problems move it at all. Quicktime 4.1 made no difference on any system. Next check was on my to oldtime MACs a 200 mhz Powerbook 3400 and a power PC 7100 with only 66 mhz. Both with system 8.6. No severe problems with any of the movies. Even on my 7 year old 7100 the 800x600 fullscreen panoramas can be seen without any problem. On my 233 mhz G3 beige with System 9.1 all Sorensen compressed movies are severely disabled. I have got several report which confirms that the problem seems to be MAC OS System 9.1 and 9.2. I have not tested 9.0 . Even on a G4 450 with 512 mb of ram and QT5, movie no 8 is jerky. There is no problem I know of in Windows. News 060602 The Jerkyness with Sorensen and MacOS 9 is solved in the new QuickTime 6 preview Other experiences send me a mail |
©2001-02 Hans Nyberg hans@nyberg.com
http://www.hans-nyberg.dk · http://www.vraarhus.dk · http://www.virtualdenmark.dk