how to export an equirectangular to circular image?

[Terry Burton]

How can I export 360 x 180 equirectangular panos to a circular format like this?

[John Houghton]

On Nov 19, 8:31 pm, Terry Burton <tbur...@fcgov.com> wrote:
> <https://lh5.googleusercontent.com/-vnsePKKsSsc/UKqW1zFXqYI/AAAAAAAAAA...>

> How can I export 360 x 180 equirectangular panos to a circular format like
> this?

Specify the output projection as circular, with horizontal and
vertical fov=180 degrees. An equirectangular panorama image can be
input with the lens type specified as Equirectangular, with 360
degrees horizontal fov.

John

[Michael Oates]

I have a rather unusual feature request...

Here is what I have found when I use my shift lens to take 3 lots of bracketed shots, i.e.
about 5 or 7 different exposures at left, middle and right of the shift.

Load the images, align and it then brings up the "Bracketed Exposures" box. I would them
select "Enable HDR mode and link the bracketed images" tick the Exposure Fusion option and
then "OK"

If I do this with say three lots of brackets shots made with my shift lens, I would have
ticked the images that have been shifted in the Lens Setting tab, before pressing Align. I
have found that this produces the best HDR fusion image I have ever had comparing with
other HDR software such as Photomatix or Nik HDR Pro. By best I mean it does not look like
a typical HDR image and looks very natural yet with highlight and shadow information
retained. It also reduces noise in the image just because it is combining a few images,
fantastic just what I want.

Now for my request...

As this program does such a great job of producing a HDR image (Fusion), I would like to
be able to load up one set of bracketed exposures all without moving the camera/lens. i.e.
I am not stitching at all (tripod used so there is no movement). Is it possible to tell
PTGui to go through the motion of loading the images, align to bring up the "Bracketed
Exposures" box etc, without actually performing any stitching?

Or perhaps this can already be done by making some settings changes?

So basically what I am asking is, can I use PTGui as a HDR program without any stitching?

Thanks,

Mike

[Erik Krause]

Am 19.11.2012 22:16, schrieb Michael Oates:
> As this program does such a great job of producing a HDR image (Fusion), I would like to
> be able to load up one set of bracketed exposures all without moving the camera/lens. i.e.
> I am not stitching at all (tripod used so there is no movement). Is it possible to tell
> PTGui to go through the motion of loading the images, align to bring up the "Bracketed
> Exposures" box etc, without actually performing any stitching?
>
> Or perhaps this can already be done by making some settings changes?
>
> So basically what I am asking is, can I use PTGui as a HDR program without any stitching?

PTGui does exposure fusion on the images. This is exactly what enfuse
does, the first (command line) program to implement exposure fusion.
Have a look at EnfuseGUI. If you are not on Windows perhaps you find
something on
http://wiki.panotools.org/Enfuse#GUIs

--
Erik Krause
http://www.erik-krause.de

[PTGui Support]

Hi Michael,

Or if you insist on using PTGui see 6.14:
http://www.ptgui.com/support.html#6_14

PTGui will always do warping and blending step though so the process
would take more time than necessary.

Joost

[Michael Oates]

Joost, and Erik,

Many thanks for both your replies. Fantastic I will try both methods and see which suits
me best.

I had not heard of Enfuse before or the GUIs that use it.

PTGui does a superb job of stitching my shifted images, never a problem, Photoshop can't
cope with it.

Thank you,

Mike

[luca vascon]

In effect ptgui alone is so powerful that still surprends me, once you get the grip on it, the "alternative uses" are so many that using it for panoramas only is quite a limit. :-)

And it gives you great control on quite everything.

I never ttried it for focus stacking.... :-D

2012/11/20 Michael Oates <m...@mikeoates.org>

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