Can someone please explain the relationship between Cube Face Size, Optimal, Quality and Sub Tile on final quality.
Thanks
John
Cube Faces etc
-
360Texas
- Moderator
- Posts: 3684
- Joined: Sat Sep 09, 2006 6:06 pm
- Location: Fort Worth, Texas USA
- Contact:
Hmmm well, I will try.
Cube faces are the 6 sides of a real cube. Their sizes are measured in pixels height x width. Typically the larger the cube face is the better image detail quality you get. Desirable cube face size is determined by width of panorama like 4000 pixels divided by Pi or 3.1416. So lets say your stitched panorama that is 2000 pixels high x 4000 pixels wide. 4000 / 3.1415 =1273.236 or 1273 pixels cube face size. Cube faces are numbered 0 front, 1 right, 2 back, 3 left, 4 top or UP, 5 down or bottom.
Optimal is some variation of the width x Pi arithmetic. (Maybe Thomas can add more explanation here) Once clicked the cube face size is automatically calculated.
Sub Tile is the gray tiling you see when the panorama is downloading and starting to be seen 3 x 3 divides the cube face up into gray scale images 3 across and 3 down. 5x5 makes smaller gray squares you see while loading. Gray squares just load first to show the visitor some activity is working.. while the color panorama finishes downloading. Gives the visitor something to see.
Image Quality = amount of compression applied to whole panorama. low lots of compression - high.. with almost no compression
Tile Quality = Here you can decide for yourself which cube face side gets individual compression.
For example, Tile
0 front,
1 right,
2 back,
3 left, are all around the horizon and you need best detail 100% means no compression. Start off using say compress down to 70% or only 30% reduction.
4 top or up is the sky or ceiling where there is not alot of detail blue sky. Too much compression causes the sky to get checkered or banded. Most I ever compress the sky is 35%. You can test by using 35 or 40% create the pano.. and look up at the sky.. look for small artifacts or checkering. If you see artifacts then compress down to 50% and recreate the pano and look again.
5 down or bottom - here I can get away with more compression say 30% because the ground is already detailed and you probably won't see any over compression artifacts like in a solid blue sky.
End result is that you can overall control the end file size like 1 mb - 1.5mb. Individual Cube Face Quality compression give you the best control over end file size.
Hope that helps
Cube faces are the 6 sides of a real cube. Their sizes are measured in pixels height x width. Typically the larger the cube face is the better image detail quality you get. Desirable cube face size is determined by width of panorama like 4000 pixels divided by Pi or 3.1416. So lets say your stitched panorama that is 2000 pixels high x 4000 pixels wide. 4000 / 3.1415 =1273.236 or 1273 pixels cube face size. Cube faces are numbered 0 front, 1 right, 2 back, 3 left, 4 top or UP, 5 down or bottom.
Optimal is some variation of the width x Pi arithmetic. (Maybe Thomas can add more explanation here) Once clicked the cube face size is automatically calculated.
Sub Tile is the gray tiling you see when the panorama is downloading and starting to be seen 3 x 3 divides the cube face up into gray scale images 3 across and 3 down. 5x5 makes smaller gray squares you see while loading. Gray squares just load first to show the visitor some activity is working.. while the color panorama finishes downloading. Gives the visitor something to see.
Image Quality = amount of compression applied to whole panorama. low lots of compression - high.. with almost no compression
Tile Quality = Here you can decide for yourself which cube face side gets individual compression.
For example, Tile
0 front,
1 right,
2 back,
3 left, are all around the horizon and you need best detail 100% means no compression. Start off using say compress down to 70% or only 30% reduction.
4 top or up is the sky or ceiling where there is not alot of detail blue sky. Too much compression causes the sky to get checkered or banded. Most I ever compress the sky is 35%. You can test by using 35 or 40% create the pano.. and look up at the sky.. look for small artifacts or checkering. If you see artifacts then compress down to 50% and recreate the pano and look again.
5 down or bottom - here I can get away with more compression say 30% because the ground is already detailed and you probably won't see any over compression artifacts like in a solid blue sky.
End result is that you can overall control the end file size like 1 mb - 1.5mb. Individual Cube Face Quality compression give you the best control over end file size.
Hope that helps
