Panorama help
Jul 24, 2016 17:49:31 #
I need to get up to speed taking panoramas for an upcoming vacation. This is my first attempt. I had no trouble stitching using Gimp, but so far I've had no success balancing the color and exposure across the layers. I've spent hours trying, using google, researching and practicing various methods, but I guess I'm just not getting it.
The attached photo was shot using using a Canon 70D in manual mode, and all three layers are at the same aperture and shutter speed. I probably should have used evaluative metering, but the exif data shows I was using spot.
Thanks for any suggestions.
The attached photo was shot using using a Canon 70D in manual mode, and all three layers are at the same aperture and shutter speed. I probably should have used evaluative metering, but the exif data shows I was using spot.
Thanks for any suggestions.
Jul 24, 2016 18:04:27 #
It almost appears that something changed exposure index wise between frames.
Jul 24, 2016 18:04:51 #
It almost looks like you've overlapprd the images, and the densities added together, rather than stitching them together. And, were you using a polarizing filter?
Jul 24, 2016 18:10:02 #
twowindsbear wrote:
It almost looks like you've overlapprd the images, and the densities added together, rather than stitching them together. And, were you using a polarizing filter?
Good question. I didn't think of that one.
Jul 24, 2016 18:16:48 #
Longshadow wrote:
It almost appears that something changed exposure index wise between frames.
That is entirely possible if you don't lock exposure before shooting the pano.
I have seen recommendations to switch to manual exposure for pano and HDR bracketing.
Jul 24, 2016 18:21:57 #
Rob909 wrote:
I need to get up to speed taking panoramas for an ... (show quote)
There are several free panorama programs available that might be easier to use than Gimp: http://www.techsupportalert.com/best-free-digital-image-stitcher.htm#Quick_Selection_Guide
I've not used any of them since I have Photoshop/Lightroom so I can't recommend any.
Jul 24, 2016 18:22:26 #
twowindsbear wrote:
It almost looks like you've overlapprd the images, and the densities added together, rather than stitching them together. And, were you using a polarizing filter?
Yes, circular polarizer.
Don't you have to overlap to stitch them together? And wouldn't the software take care of the densities adding? In Gimp, once you have the layers aligned properly you go to Filters, Combine, Arrange as panorama.
Jul 24, 2016 18:24:16 #
rwilson1942 wrote:
That is entirely possible if you don't lock exposure before shooting the pano.
I have seen recommendations to switch to manual exposure for pano and HDR bracketing.
I have seen recommendations to switch to manual exposure for pano and HDR bracketing.
That's what I thought at first, but he did state the same exposure parameters were used.
Jul 24, 2016 18:28:10 #
Rob909 wrote:
Yes, circular polarizer.
Generally, a polarizing filter doesn't work very well on a view of the sky that is this wide. Try another without the pola filter on your camera.
Don't you have to overlap to stitch them together? And wouldn't the software take care of the densities adding? In Gimp, once you have the layers aligned properly you go to Filters, Combine, Arrange as panorama.
Generally, a polarizing filter doesn't work very well on a view of the sky that is this wide. Try another without the pola filter on your camera.
Don't you have to overlap to stitch them together? And wouldn't the software take care of the densities adding? In Gimp, once you have the layers aligned properly you go to Filters, Combine, Arrange as panorama.
Yes, you DO have to overlap the images for a pano photo. This pano looks like the individual images were somehow 'added' together, on top of the overlap rather than stitched. I'm probably not making myself clear though.
Jul 24, 2016 18:29:22 #
Rob909 wrote:
I need to get up to speed taking panoramas for an ... (show quote)
Make sure you're in manual mode and Auto ISO is off.
Jul 24, 2016 20:06:18 #
Rob909 wrote:
I need to get up to speed taking panoramas for an ... (show quote)
The photos have just been stitched together, so there is no correction for vignetting or geometric distortion or exposure blending.
First you want to do lens profile correction on each image.
Then you want to stitch these using a geometric projection (I recommend cylindrical) with exposure blending.
Of course, the images should have been taken in manual exposure mode with fixed ISO, and with fixed focus.
Jul 24, 2016 20:08:46 #
A CPL would change the color of the sky into alternating light/dark patterns. See the left hand side of the image where the reflection on the water changes. It also looks like there is not enough overlap on the original images before the merge. I usually overlap by ΒΌ of the image.
If you are shooting in JPG, look at Microsoft ICE for merging panoramas.
If you are shooting in JPG, look at Microsoft ICE for merging panoramas.
Jul 24, 2016 20:19:19 #
I think twowindsbear's comment was embedded in the original quote in his response.
I agree, I think the light on the left and right had a different effect on the image because of the polarizer.
"Generally, a polarizing filter doesn't work very well on a view of the sky that is this wide. Try another without the pola filter on your camera. "
I agree, I think the light on the left and right had a different effect on the image because of the polarizer.
"Generally, a polarizing filter doesn't work very well on a view of the sky that is this wide. Try another without the pola filter on your camera. "
Jul 25, 2016 00:01:40 #
The Lightroom panorama stitcher is trivial to use and shows no issues. It is very forgiving. I know you are supposed to fix the camera on a tripod and rotate on its axis to do it right. But I just handhold and take multiple overlapping shots. I know you are supposed to use M to lock the exposure. But I usually just use A.
Here are a couple recent quick examples:
http://www.uglyhedgehog.com/t-401386-1.html
Here are a couple recent quick examples:
http://www.uglyhedgehog.com/t-401386-1.html
Jul 25, 2016 00:48:39 #
rwilson1942 wrote:
There are several free panorama programs available that might be easier to use than Gimp: http://www.techsupportalert.com/best-free-digital-image-stitcher.htm#Quick_Selection_Guide
I've not used any of them since I have Photoshop/Lightroom so I can't recommend any.
I've not used any of them since I have Photoshop/Lightroom so I can't recommend any.
Thanks for the link. I tried two of them. Microsoft ICE did a beautiful job with the color and exposure blending, but a poor job of stitching. It would only let me align them horizontally. It wouldn't let me do any vertical adjustment. Autostitch was unable to stitch them at all. The third program wouldn't download.
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