On 2/3/25 16:16, Greg 'groggy' Lehey wrote:
I have recently got a 7Artisans 4 mm f/2.8 circular fisheye lens with
an angle of view of claimed 225°. I'm using it on an Olympus E-PM2,
and I'm having no luck at all stitching panoramas. I suspect that
there is some issue with Hugin misinterpreting the Exif data, but
before I go to even more work, a question: is anybody using a lens of
this nature? Are there any tricks?
I'll follow up with more details if nobody sees an immediate issue.
You can also take a look at the three images
http://www.lemis.com/grog/Day/20250131/Office-0.jpeg
http://www.lemis.com/grog/Day/20250131/Office-1.jpeg
http://www.lemis.com/grog/Day/20250131/Office-2.jpeg (each about 900
kB), or at my diary at
http://www.lemis.com/grog/diary-feb2025.php?topics=p&subtitle=More%20fisheye%20fun&article=D-20250202-012736#D-20250202-012736
One thing that is interesting: the "focal length" popup sometimes
reports a horizontal angle of view of 248° (close enough, since it's
way off the end of the image), but at other times 186°, which is
clearly wrong. Is there any way to tell the GUI or the underlying
scripts what the real angle of view is?
Greg
Hi, Greg!
I tried several different ways of generating control points with your
JPEGs, and was unable to generate any control points connecting any images.
I manually added some, but alignment didn't give me anything except a
jumble of spikes. The nearest I got to anything coherent was using the
Lambert Cylindrical Equal Area projection, and that just gave me a row
of separate hump-shaped images that didn't really connect.
Sorry, I have no other ideas. I don't know if everything's being
affected by the pronounced chromatic distortion around the edges of each
image, but I know nothing about using fisheye lenses like yours!
--
David W. Jones
[email protected]
wandering the landscape of god
http://dancingtreefrog.com
My password is the last 8 digits of π.
--
A list of frequently asked questions is available at:
http://wiki.panotools.org/Hugin_FAQ
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