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Author Topic: PTGUI question  (Read 2537 times)

theophilus

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PTGUI question
« on: September 02, 2008, 09:55:06 pm »

OK, finally got around to purchasing PTGUI.  I know some of you use it, and I was wondering how much processing you do in your raw processor before you try to stitch your photos.  

I am using Lightroom 2 - I'd like to at least do some basic contrast/exposure correction, and I'd like to know everyone's experiences with this.
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sergio

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PTGUI question
« Reply #1 on: September 02, 2008, 10:24:51 pm »

What I do in LR is have the images as uniform as possible in their settings. I choose the image with the greater contrast, find the best possible settings, finesse my WB and then have the exact same settings for all of them. I try to avoid setting the exposure or brightness individually as this will either make stitching more difficult or result in unnatural looking image. After that, I stitch, and finish off in PS.
« Last Edit: September 02, 2008, 10:25:48 pm by sergio »
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Panopeeper

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PTGUI question
« Reply #2 on: September 02, 2008, 10:30:03 pm »

Quote
OK, finally got around to purchasing PTGUI.  I know some of you use it, and I was wondering how much processing you do in your raw processor before you try to stitch your photos
1. This has nothing to do with PTGui.

2. Generally you should do in the raw conversion everything, which is done best in the raw conversion; the following stitching does not change on that. Particularly, vignetting correction should be done in that stage.

3. Do only scene sharpening, and only moderately. I often generate a set with medium sharpening for picking the control points (I do this manually), and later a new set for the final pano.

4. Pick WB and change colority on all images together.

5. If possible, change contrast, saturation, brightness, recovery and curve adjustments on all images together. If you have to make individual adjustment, do it only moderately.

6. 4 and 5 above are under the assumption, that all frames have been shot with the same exposure and ISO, and the illumination did not change during shooting the frames. If this is not the case, then a tiresome process follows: adjusting the frames, so that the brightnesses match.
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Gabor

BernardLanguillier

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PTGUI question
« Reply #3 on: September 03, 2008, 01:42:25 am »

Quote
6. 4 and 5 above are under the assumption, that all frames have been shot with the same exposure and ISO, and the illumination did not change during shooting the frames. If this is not the case, then a tiresome process follows: adjusting the frames, so that the brightnesses match.
[a href=\"index.php?act=findpost&pid=219074\"][{POST_SNAPBACK}][/a]

Agreed in general, but Autopano Pro () can do a pretty good job at merging seemlessly images that have been shot with different exposures. This can be great when dealing with very high contrast panos like night scenes.

This mimics what could be done with some of the rotational film based pano cameras where the speed of rotation could be modified as a function of the angle. Slower rotation for dark areas, faster for lighter areas.

Cheers,
Bernard

Thomas Krüger

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PTGUI question
« Reply #4 on: September 03, 2008, 02:46:32 am »

Preparing images in LR for PTGui I tend to process the images with a bit lower contrast. Optimizing is done later in PS on the stitched image.

LR/Enfuse is a Lightroom plug-in for Enfuse to merge bracketed images:
http://timothyarmes.com/lrenfuse.php

Another helpful tool is TuFusePro at http://www.tawbaware.com/tufusepro.htm
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