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#1 2012-09-22 14:43:07

Christian Stüben
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From: Wuppertal, Germany
Registered: 2012-07-03
Posts: 289
Website

things that can go wrong when stitching, or: fooled by the wind

It was a perfect day, sunny, blue sky, no wind at all. The lake was a perfect mirror. Trees, houses, the cloyster doubled in the lake. Perfect.

But at home, when stitching the pictures, i had to notice that at the bottom row of the pictures some wind has come up. So the structure of the water had changed from glassy to waves. There is a clear viewable border between glassy and waves sad

Must be redone completely at the next sunny and windless day.

http://www.wackel3d.de/gigapanos/daneben/beyenburg.html

greetings from germany
Chris


---
always remember, the world is a flat disk.

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#2 2012-10-05 04:43:09

Judy-A
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From: Edmonton, Canada
Registered: 2009-11-12
Posts: 234
Website

Re: things that can go wrong when stitching, or: fooled by the wind

Christian Stüben wrote:

But at home, when stitching the pictures, i had to notice that at the bottom row of the pictures some wind has come up. So the structure of the water had changed from glassy to waves. There is a clear viewable border between glassy and waves sad

Hi Christian,

That’s a very pretty scene.

This problem with water texture has happened to me, too. One trick that sometimes works if you have overlapping images shot with a wide lens, is to output to a PSB file with pictures embedded. Then, in the water area, make a wide zig-zag mask to blend two overlapping images.

I did that in three places in this Lake Louise panorama. Look carefully and you can see the zig-zags of separate water texture.

http://www.judyarndt.ca/pano-july2011/l … uise1.html

Judy Arndt

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#3 2012-10-07 15:20:42

beetwo77
Member
Registered: 2012-08-28
Posts: 29

Re: things that can go wrong when stitching, or: fooled by the wind

I tend to load my problematic water surface into photoshop and use surface blur filterand some brushing / masking to smooth the water smile Cheating but can work nicely if you need to recover a pano that has bad water.

I duplicate the layer with the water, use the surface blur filter on the whole layer, add a layer mask and invert it (to empty it) then gradually smooth out the bits of water that need smoothing by brushing in with a low opacity brush. This is an example of such a shot where I had to smooth the boundaries between images due to change in water patterns. It is there if you look but doesn't jump out at you:

http://farm9.staticflickr.com/8291/7876717150_1742649340.jpg
Sydney_After_Dark by Beetwo77, on Flickr

The other options of course include using neautral density filters for long exposure or multiple image stacking to smooth the water. This is an example of such a shot (no surface smoothing at all):

http://farm9.staticflickr.com/8182/8049458512_c958bd06c6.jpg
Two_Toning_Darling_web by Beetwo77, on Flickr

Last edited by beetwo77 (2012-10-07 15:52:30)

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