Issues with stitched pans: I shot several pictures that I was able to stitch together, but the resulting shot had a lot of circular patterns in the sky or that's where they are most...

manofhg Loc: Knoxville, TN

I shot several pictures that I was able to stitch together, but the resulting shot had a lot of circular patterns in the sky or that's where they are most noticed. I've attached one of the pans that has minimal PS work on it. I know there are many issues that need to be worked on, like spots and other things, but the patterns is what I don't know how to resolve or know exactly what caused them. I tried several times to also post a processed image that shows the patterns better, but for whatever the reason, UHH won't accept it saying there are internal errors. Yes, I've told the admin about it, but nothing resolved yet. If you take the attached, you can ramp up the "dehaze" and various other sliders in PS and see what I'm talking about. Anyone know the cause, solution, prevention? This is made from 7 images and there are probably 7 of the patterns in the pan, so it came from each individual image probably. Thanks for taking a look.

(Download)

Rongnongno Loc: FL

Dust on the sensor, nothing to do with your stitching.

Also, this is the wrong section, use the Gallery or the panorama section.

CHG_CANON Loc: the Windy City

The 'internal error' is probably due to the image file being too large, in bytes. The documented file size limit is 20MB (mega bytes). 'Stitched' images tend to easily exceed this storage size. You can post an image of any 'width' in pixels. If wider than around 1200px, a thumbnail display will be created, such as above. But, the attachment can be opened and viewed at the full pixel resolution.

None of us can control the vague error messages the UHH site provides. But, we all can understand a 20MB file size limit, and act appropriately. If you need help on how to action this limit, see this link for help.

Recommended resizing parameters for digital images

manofhg Loc: Knoxville, TN

CHG_CANON wrote:

The 'internal error' is probably due to the image ... (show quote)

Yes, I realized that the first time and there wasn't an error, only the message that the image was too large. After hand palming, I reduced the image to about 14 MB and that is when the internal error arose. The image I have attached here is only about 6 MB, much larger and it only gives the internal error message. The other image I've tried to post is 5.22 MB and here is the error message I get (ends with a comma).

"There was an internal problem processing your attachment. Please go back and try again. If the problem persists, then please contact the administration,"

CHG_CANON Loc: the Windy City

manofhg wrote:

Yes, I realized that the first time and there wasn... (show quote)

Oh well, maybe there's still another technical limit inside UHH these files have exposed, beyond the minimum pixels wide and attachment storage in bytes. Only ADMIN would know those details.

R.G. Loc: Scotland

Did you use a CPL filter or any other kind of filter?

manofhg Loc: Knoxville, TN

R.G. wrote:

Did you use a CPL filter or any other kind of filter?

Trying to remember, but if I used anything, it would have been a CPL. I'm wondering if I were to take each image and try to use the vignette tool to remove vignette that I don't even see, if when stitching they would be better.

cahale Loc: San Angelo, TX

manofhg wrote:

I shot several pictures that I was able to stitch ... (show quote)

Those circular patterns are dust on either your lens or your sensor. Also, while stitching yields nice results sometimes, this shot looks like it could have been made with a wide-angle lens and then cropped to produce the panorama effect.

R.G. Loc: Scotland

manofhg wrote:

Trying to remember, but if I used anything, it would have been a CPL. I'm wondering if I were to take each image and try to use the vignette tool to remove vignette that I don't even see, if when stitching they would be better.

CPL filters have been known to produce funny effects with panoramas (and also with wide angle lenses - but in this case I see it was shot at 200mm). Seven shots suggests that the camera angle changed significantly from the start of the sweep to the end.

Another possibility - when you import into your photo editor, does it perform automatic lens corrections? If anything it looks like something may be over-enthusiastically trying to correct vignetting.

Whatever the cause, trying to remove vignetting beforehand sounds like a good idea.

bwana Loc: Bergen, Alberta, Canada

manofhg wrote:

I shot several pictures that I was able to stitch ... (show quote)

The biggest problem I have with stitching images is not handling vignetting prior to stitching. I now use AutoGiga Pano which handles this automatically; a godsent!

manofhg Loc: Knoxville, TN

R.G. wrote:

CPL filters have been known to produce funny effects with panoramas (and also with wide angle lenses - but in this case I see it was shot at 200mm). Seven shots suggests that the camera angle changed significantly from the start of the sweep to the end.

Another possibility - when you import into your photo editor, does it perform automatic lens corrections? If anything it looks like something may be over-enthusiastically trying to correct vignetting.

LR did recognize that it was using that lens and corrected. I haven't tried turning the auto correction off to see if it changes though. I'll have to remember to NOT use a filter when shooting pans in general.

Thanks

manofhg Loc: Knoxville, TN

bwana wrote:

The biggest problem I have with stitching images is not handling vignetting prior to stitching. I now use AutoGiga Pano which handles this automatically; a godsent!

I'll have to take a look at AutoGiga Pano. Thanks

manofhg Loc: Knoxville, TN

cahale wrote:

Those circular patterns are dust on either your lens or your sensor. Also, while stitching yields nice results sometimes, this shot looks like it could have been made with a wide-angle lens and then cropped to produce the panorama effect.

While there are some dust issues in the form of spots that I can take care of, that wasn't causing the vignette effect. The original images were shot at 200 mm.

manofhg Loc: Knoxville, TN

Rongnongno wrote:

Dust on the sensor, nothing to do with your stitching.

Also, this is the wrong section, use the Gallery or the panorama section.

Thanks for the correction of section. I don't believe it is entirely a dusty issue though. I've shot many panos, but never had this issue. I think that I was using a CPL and know I shot at 200 mm.

R.G. Loc: Scotland

manofhg wrote:

LR did recognize that it was using that lens and corrected. I haven't tried turning the auto correction off to see if it changes though. I'll have to remember to NOT use a filter when shooting pans in general.

Thanks