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Re: [OM] PTGui vs PhotoShop photomerge

Subject: Re: [OM] PTGui vs PhotoShop photomerge
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Mon, 12 Jan 2009 12:41:13 -0500
Very pretty.  What are the trees?

Chuck Norcutt


Frank van Lindert wrote:
> What a concidence, Chuck.
> I also was busy today building a small panorama picture, consisting of
> 2 frames only. And I also have always used PTGui, but today started
> with CS (version 2 in my case).
> It worked like a dream: I could just accept all default values
> suggested by PS.
> Here is a small version of the result (next years X-mas card, perhaps)
> http://www.vanlindert.nl/Frank/knot1+2_with_c.jpg
> 
> Pictures taken with OM-Zuiko 90/2 on E-400. Difficult to focus because
> of the stopping down and the lack of focusing aids on the matte
> screen....
> 
> Frank van Lindert
> Utrecht NL.
> 
> 
> On Mon, 12 Jan 2009 08:46:35 -0500, Chuck Norcutt wrote:
> 
>> I've used PTGui for making panoramas for almost 5 years.  Perhaps 
>> because I don't make very many panos, I've only previously encountered 
>> one problem and that was clearly due to motion between frames.  But last 
>> night I tried to make a seven frame pano of Grand Island, Michigan which 
>> was driving PTGui over the edge.  It insisted that the leftmost frame 
>> (which contained an orange building) was tied to four of the other six 
>> frames despite only one of them containing part of the same building. 
>> Despite its complaints the preview image it built looked correct.  But 
>> allowing it to go ahead and build the final output only resulted in a 
>> ridiculous looking mess.
>>
>> To be fair, I hadn't used a tripod and I wasn't particularly careful 
>> with the shots.  After examining the two frames with the orange building 
>> I realized there was only about 15% overlap and I usually try for about 
>> 30%.  Also, some of the key points on the building (such as window frame 
>> corners) were obscured by leaves.  I decided to help it out by manually 
>> positioning the two frames with the building, making a small pano from 
>> that and then feeding that into a new pano with the remaining frames. 
>> Didn't work.  It just created a different looking mess with blurry 
>> streaks of the orange building appearing several times across the final 
>> pano.  I think it somehow decided that the patterns in the trees and 
>> leaves were more important than the bright orange.
>>
>> Frustrated, I finally decided to give PhotoShop CS3's photomerge a try. 
>>  I'd never previously used it since I didn't have to.  It build a near 
>> perfect pano on the first try but I noticed that the horizon had a 
>> slight bow downwards in the middle.  So I changed to (I think it was) a 
>> cylindrical mapping from the auto mode and all was well.  I was 
>> impressed.  All done with no fuss and with good performance.  Recommended.
>>
>> Chuck Norcutt
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