... I think for a valid comparison you should do the scaling and sharpening in Photoshop, carefully optimizing each set to the highest possible quality...
While doing experiments with Pano2VR I discovered that the last Mac version defaults to Pi conversion of cubefaces in the convert input option but when you do...
What version did you use? v2.1.1 or v2.2 beta1? According to Thomas there are some bugs in 2.2 beta1 that will be dealt with in the forthcoming beta2. Erik...
Hans, thanks for your efforts to share your findings with us! Hhm, but I must admit I'm not sure if I do understand this correctly. Do you mean it's possible...
... Nice test. However, we all know that using a large cube face size and not allowing zoom in to 1:1 pixel display is a waste of bandwidth. It is no surprise...
... Go to Tools -> Options -> Folders&Files and look what is configured for Equierctangular JPEG. Enter your favorite viewer if necessary. best regards -- Erik...
... This may be due to the fact that Pano2VR uses a non-sharpening anti- aliasing interpolator. On http://wiki.panotools.org/Anti-aliasing_interpolators the...
... Yes and No. You may also do that But If you read my page again you will see that I use the full resolution equirectangular as the source image to convert...
... Ah, ok. So in the example given above one would take the 1000 x 500 equirectangular and convert it directly to cube faces with 222 x 222... ... I'm always...
... http://www.panagito.com/MISC/cat.html for glass bottom lighting is nice. so I made a hole in a piece of transluscent plastic and a disc that fitted the...
... CubicConverter uses Bicubic which seems to be called Cubic in wiki. Why not use the Bicubic definition if it is the same. I never heard anyone call it just...
Am Saturday, November 01, 2008 um 11:33 schrieb ... No. To simplify the calculation you can simply divide by 4.5 (app. pi/0.7) In any case: It might be best to...
... An image says more than..... Here is a screenshot with movies made from the 8600x4300 test image. Resized to 1904 cubefaces directly. From left Pano2VR...
... Thanks a lot, that really simple :-) ... I'm using Eric Gerds' DOSUP (Pano2Faces.bat) for conversion. As far as I know it's using spline64 as interpolator....
I think this proves an important point. You can't simply throw away pixels hoping they are bayer artifacts. The top left is so terrible compared to the others....
... Exactly, and well pointed out! This is an interesting trade-off that's worth remembering. With very high resolution images, JPEG damage isn't as noticable...
Yes, it was using QT as the viewer. I also had RealPlayer configured as my default player for .mov files. I think the combination was the cause. Fixed it --...
Ken Warner
kwarner000@...
Nov 1, 2008 3:35 pm
24224
It's another All Saints' Day here in Poland, the time to visit cemeteries and light some candles on the graves. The weather's not too conducive to photo ...
... spline64 isn't an anti-aliasing interpolator hence it's not optimal for downsizing. You can specify different interpolators on the DOSUP command line, but...
Thanks a lot, Erik! I've tried both Lanczos3 and Mitchell with DOSUP like you proposed. The visual difference is surely worth the (much) longer processing time...
... This is chosen by design, and there are two reason: * The tile size width/Pi is practical for converting between formats to avoid losing quality but for...
... The "bi" in bicubic comes from the fact that the filter is used 2 times, one time in X and one time in Y direction. If you use such a filter on a CT scan...
... The reason for these artifacts is chroma subsampling http://en.wikipedia.org/wiki/Chroma_subsampling . In Pano2VR and Pano2QTVR the subsampling is turned...
Hi Thomas, I saw this behavior too, if I open a 4000x2000 panorama, then the default cubeface is width/4 = 1000. But if you use width/4 you are loosing quality...
... to Pi ... the ... Ok If you had followed this thread this is exactly what I have tried to illustrate. However I still believe the different sizes are...
... I agree completelly. The optimal size shown right beside the cubface size is very confusing. It is also not relevant today. You do not produce movies for...
... But for the "best cube face possible" you have to think the other direction. You have to think of the necessary equirectangular to produce these cube...
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