Hugin freezing during blending

[Mikayla]

Hello!

I'm very new to Hugin, so I apologize if this is a rudimentary question. I am trying to stitch images taken from Google earth to create an equirectangular panorama shot. When I go to stitch the images, the  commands freeze when it gets to: 

"Blending images...

enblend: warning: input images too small for coarse mask

enblend: note: switching to fine mask"

I don't know what's happening or why It refuses to continue processing. 

Any help would be greatly appreciated!

Thanks!

-M

[Bruno Postle]

Hi Mikayla, this doesn't sound like a familiar problem, so we can't say for sure. Please can you post a PTO project file so we can have a look (no need to post the images).

--
Bruno

[MikaylaL]

Sure! 

Thanks for taking a look!

It occurred to me today that there is the possibility that it's a hardware issue, so I will be trying it on a different computer in the next few days.

Best,

M

[Bruno Postle]

Hi Mikayla, I can get it to stitch here, the enblend warning is just
because the output panorama is very small (4096x2048), but this is
ok. It takes a few minutes for enblend to blend everything
together, maybe it was just taking a very long time.

The images are all very precisely arranged in the panorama, but the
control points make no sense - are these the correct positions for
the photos? or do they need aligning?

The control points are all clustered in a small rectangle at the
bottom left of each image, is there a logo or something in every
picture? If you want to generate control points you will first need
to mask out this area using the Masks tab in the Panorama Editor.

--
Bruno

On Fri 19-Mar-2021 at 09:38 -0700, MikaylaL wrote:
>Sure!
>Thanks for taking a look!
>
>It occurred to me today that there is the possibility that it's a hardware
>issue, so I will be trying it on a different computer in the next few days.

>On Friday, March 19, 2021 at 8:34:34 AM UTC-5 bruno wrote:
>
>> Hi Mikayla, this doesn't sound like a familiar problem, so we can't say
>> for sure. Please can you post a PTO project file so we can have a look (no
>> need to post the images).
>>

[MikaylaL]

Hi Bruno,

Thanks so much! 

Yes, it's the google earth logo. I left it because I figured the photos overlapped enough it wouldn't be a problem. 

I considered it may have just been taking a long time to process, but I think what would happen is that it would eventually time-out on my computer and end up failing. I will try again! Hopefully I can get it to work.

Thanks again!

Best,

Mikayla

[Monkey]

Enblend is very slow. Multiblend is much, much quicker:

http://horman.net/multiblend/

You change the Hugin settings under the Programstab (Use alternative Enblend program) and point it to multiblend.exe instead.

[Mikayla Absher]

Oh that's great! Thank you! I'll definitely try it out

Best,

Mikayla

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[Gunter Königsmann]

Hmmm... One partially related question: Would it make sense to make multiblend the default for new hugin installs?

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[T. Modes]

gunter.ko...@gmail.com schrieb am Samstag, 20. März 2021 um 17:00:32 UTC+1:

Hmmm... One partially related question: Would it make sense to make multiblend the default for new hugin installs?

Multiblend does not support all necessary features needed by Hugin. So it can't currently be the default.

[Luís Henrique Camargo Quiroz]

   @Bruno: I think you have  used ptodummy to generate (missing) files for the pto, right?

    I tried this recently, however it is not working here, Debian testing, with this error message:

convert-im6.q16: unable to read image data `/tmp/9Y8FDe8hK7.pnm' @ error/pnm.c/ReadPNMImage/1340.
convert-im6.q16: no images defined `im31.jpg' @ error/convert.c/ConvertImageCommand/3229.

  Any clues about this? Thank you!

 Luis Henrique

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http://panoramaslh.net/

[Bruno Postle]

On Sun 21-Mar-2021 at 11:23 -0300, Luís Henrique Camargo Quiroz wrote:
> @Bruno: I think you have used ptodummy to generate (missing) files for
>the pto, right?
> I tried this recently, however it is not working here, Debian testing,
>with this error message:
>convert-im6.q16: unable to read image data `/tmp/9Y8FDe8hK7.pnm' @
>error/pnm.c/ReadPNMImage/1340.
>convert-im6.q16: no images defined `im31.jpg' @
>error/convert.c/ConvertImageCommand/3229.
>
> Any clues about this? Thank you!

Hi Luís, yes I used ptodummy. The error is caused by a change in
ImageMagick (it now requires a PNM image to have a trailing
newline).

It is already fixed in mercurial, or you could apply this patch to
ptodummy:

--- a/bin/ptodummy
+++ b/bin/ptodummy
@@ -22,7 +22,7 @@
my $r = 64 + int(rand(128));
my $g = 64 + int(rand(128));
my $b = 64 + int(rand(128));
- print $pnm "P3\n# CREATOR: $0\n1 1\n255\n$r\n$g\n$b";
+ print $pnm "P3\n# CREATOR: $0\n1 1\n255\n$r\n$g\n$b\n";

next unless $image->{w} =~ /^[0-9]+$/;
next unless $image->{h} =~ /^[0-9]+$/;

--
Bruno

[Monkey]

Not that I would expect it to be default - I assume that's going to be Verdandi at some point - but what "necessary" features is it missing?

I believe Multiblend was at one point bundled with Hugin as an alternative to Enblend for a release or two, not sure why it was dropped.

[Luís Henrique Camargo Quiroz]

  Bruno, thank you very much!   I will apply the patch to my ptodummy ASAP.

  regards,

  

   Luís Henrique

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[T. Modes]

Monkey schrieb am Montag, 22. März 2021 um 11:45:09 UTC+1:

Not that I would expect it to be default - I assume that's going to be Verdandi at some point - but what "necessary" features is it missing?

I thought, this is obviously. Multiblend does not support all bitdepths and necessary fileformats.