panorama software,virtual tour software
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2005-09-29
#12

Your issue come's with PTGui.

You "should" stitch to 4000x2000 .tiff (output)

Then using Photoshop resize to 1500x750 (for use in a 400x300 java viewer window) and compress using the "Save for Web" option at around 50 to 70 depending on colours and what is pleasing to the eye.

Don't use any "colour correction" within PTGui it almost always gives bad results.

Follow my method and lets hear the results.

Regards, Smooth


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2005-09-29
#13

AAAAAAAAAAAAAAAAAAAHHHHHHHHHHHHH Its sooooooooo obvious when you put it like that. That is MUCH better.

Should have spotted that from the start (been messing around for 2 solid days now). Obviously a pano thats stitched at relatively low res then reduced further will be worse than a high res one reduced to the same size. Shame that Ptgui set the default at 2500ish rather than 4000 - that would have saved me from endless hours wasted. Actually wasted is not true- this experience has made me get used to all the functions of Ptgui and TW instead of the commonly used ones. I am now alot more confident (competent) at using both.

Thanks for all your help.


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2005-09-29
#14

In the immortal words of Columbo................just one more thing if I may.

At which stage do you sharpen the image; after stitching then re-size down or resize down then sharpen......or both

 

Thanks Guys


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2005-09-29
#15

hmmm good discussion going on here.  We use a Canon 20d and a Canon Rebel XT (350d) and a Sigma 8 lens. Use Photoshop or the $100 PS Elements 3.  Virtually the same options just in different locations.

I stitch to 2500 high x 5000 width  8 bit .tiff which creates a 33mb file which is good for archiving but too large to use on our website.

For Full Screen

Resize to 1600 x 3200 13mb and "Save for Web" convert to .jpg 1.3mb
Web Display is 450 x 900

For Small Screen

Resize to 800 x 1600 .TIF and 3.66 mb and "Save for Web" converting it to a .jpg file that is around 320kb.
Web display is 275 x 450.

Rule of thumb:  Viewer height is about 30 to 35% of image height.  Example: Image height of 800 might have a web display of 240.

Background:  I actually did some research on this.  My objective was to achieve best quality when comparing QTVR .mov to Java delivery techniques with same image display windows.

Recent comparision may be viewed here:

http://www.360texas.com/tips/rd/java/index.htm 

AND  IMHO you should sharpen after resizing as a last step before converting it to a .jpg.    Do not edit the new .jpg - go back to the original  fix it.. then resize and sharpen.


/s/
Dave
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EasyPano - Panoweaver
Pano2VR


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2005-09-29
#16

I convert to resized .jpg and sharpen to suit the final .jpg which varies with size and each image. Sharpening should "always" be the very last step on the image that you are using. It is best suited to spherical images 2:1. If you need to sharpen cubes do it as a spherical image first and then cube it.

You could and can like Dave stitch your images to 5000x2500 but in the final wash up makes little difference. As you are reducing it anyway for display in Tourweaver.

Regards, Smooth