[HDR-photo] Alignment (was: Starting out...)

[listmail at mab3d.com]

On Feb 12, 2007, at 3:18 PM, Bernhard Vogl wrote:

> My previous post was meant assuming high quality panoramic imaging.  
> All the pro's and con's would go too far to be discusses here so  
> you may want to look on some examples to see the difference:
> Compare the following panoramas: (sorry, once again the Vienna  
> subway...):
>
> - in 2006 i used an automatic panohead solution to capture  
> bracketed images. The middle exposure was stitched and the  
> remaining 2 brackets used the template from the middle exposure.  
> All 3 exposures were then merged to an HDR and tonemapped back to  
> an LDR:
> As you can seein the following link (the 2006 images!), the  
> panoramas lack "crispyness":
> http://www.austria-360.at/wien/ubahn/donaukanal/index.html
> ...especially if you compare them to my latest HDR panoramas from  
> the Praterstern which were created with the method(s) described in  
> the former mail (the 2007 images!):
> http://www.austria-360.at/wien/ubahn/praterstern/index.html

Hi Bernhard,

Even more great panoramas from underground! (This will be invaluable  
to the city as a record in later years...)  The more recent set is  
much sharper, as you indicate. Are you doing any automatic alignment  
or ghost removal during the HDR creation process, or do you attribute  
this sharpness solely to stitching in 32 bits? In a following email  
you mentioned "pre-aligning" with PTGui, but not in regards to these  
shots. You obviously have my interest piqued regarding the quality of  
these HDRIs, so please tell me more.

-Mark