Re: [hugin-ptx] Re: Nona crashing on simple images

[Fabrice Kerzerho]

Thanks; yeah, indeed, but using new versions at work implies tests and
scripts adaptations - I'll do it asap in 2018 ;-)

On Tue, Jan 16, 2018 at 5:17 PM, T. Modes  wrote:

>
>
> Am Dienstag, 16. Januar 2018 10:56:58 UTC+1 schrieb FabKzo:
>>
>> Hi,
>> From which version can we find this option in the gui? I can't manage to
>> find it in 2014.0.0
>>
>> Since 2016.0, more comfortable in 2017.0.
> If everybody is using old old versions I don't need to release new
> versions and fix bugs.
>
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Re: [hugin-ptx] Getting Hugin interface to display decimal angular values ( not truncated) in assembly tab

[Fabrice Kerzerho]

Hi Thomas,

We're working with gps ( with ~3m error) to limit that and we can have a
lot of precise positionned landmarks at such distances ( above 20 kms)  to
adjust our panos on 180° hfov with ~125px/degrees for the less resoluted,
that's why we can note and correct those errors ; the work is greatly eased
while working with 360 panos, as we then presume that positioning problems
come from the stitching, quality of control points or moved tripod while
shooting- and with this process we can bypass the use of the theodolit.
I agree with you that we are reaching the limits of precision with this way
of doing things...

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Re: [hugin-ptx] Getting Hugin interface to display decimal angular values ( not truncated) in assembly tab

[Fabrice Kerzerho]

Hi Thomas,

I use Hugin since version 2009 - and I never saw that :-/

But we are talking from different things: this is the angle per pixel, but
> HFOV is the angle for the full pano. If you pano is not only 10 pixels wide
> the resolution per pixel is better then a hundredth of a degree given the
> precision of HFOV  by a tenth of degree.
> To play with your numbers: 3.5 m on 20 km correspond to 0.01 deg/pixel,
> with 1 pixels wide this is a hfov of 100 deg. Taking a hfov of 101 deg
> (+1 deg)  changes to resolution by 0.0001 deg/pixel or 3 cm on 20 km (or
> with the current precision of 0.1 deg 3 mm on 20 km).
> Sorry, but you did not convince me.


You're right but the farthest I see, the greatest the error : report an
error of 3cm per pixel at 20km on a 10k px wide pano , and you'll get a
difference of 300 meters for the whole distance represented by the v/hfov .
While working with 0.01 it would only represent 30 meters, which is
negligible for such distance, from my point of view ...

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Re: [hugin-ptx] Getting Hugin interface to display decimal angular values ( not truncated) in assembly tab

[Fabrice Kerzerho]

Hi T.Modes,

Indeed I just have tested with Hugin 2017.0.0.eac5e8cc546e and it indeed
does display fov with thenth degree rounded - and that's very cool ; I was
previously on 2014 then 2016 versions.
But I'm working with distances equiv. to ~20km , at this distance a simple
pixel represents ~ 3.5 meters ; I have to  accurate at the hundredth  - and
I am : I correct my panos multiple time to conform it to my grid  (
considering the topographical errors) by a "trial and error" method through
the "GL" tab since there's indeed no visible change in this preview window.
But when I don't have 360° horizontally I have to guess the hfov
considering that there's differences between hugin values and my soft, and
thus the pixel/degree ratio.
The possibility for me to display the fov to hundredth degree rounded would
ease this job - a simple choice of the rounded precision would be welcome
:-) .
Meanwhile I'll try to recompile and modify as Sean's proposal.

On Thu, Nov 9, 2017 at 5:57 PM, T. Modes  wrote:

> Hi,
>
> sorry.
> Some people seems to be using another Hugin version. Current version is
> displaying fov for the the pano to tenth degree rounded (not truncated!).
> This is IMHO more than precise.
>
> And there seems to be excessive expectation to the precision.
> One example: Take a pano 1 pixels wide (a small value) and a hfov of
> 100 deg (also a small value for a normal pano).
> So in the interface you can distinguish between 100.0 and 100.1 deg hfov.
> These values correspond to a angular resolution of 0.010 and 0.01001 deg
> per pixel, respective.
> The difference is 1e-5 deg/pixel. This angle corresponds to the width of a
> hair in 500 m distance. So you would need a very special gear to resolve
> this difference.
> And this is with the current setup. So I don't understand why this should
> be too imprecise.
>
> (The fit and center algorithm work with a resolution of 1 deg. So the
> displayed values are more precise than they were calculated.)
> So before posting more demands for more precision please think first
>
> Thomas
>
> PS:
> @Gunter: I don't know to which arrow buttons you refer. Or are you
> referring to the slider in the fast preview window? A change of 1 deg in
> fov translate to change in the pixel range when relating to the monitor
> width (this is what you see in the fast preview window). So a step width of
> 0.1 deg here would result in nearly no visible changes in the preview. And
> you would need to click several times before you even see a change. This is
> not practicable.
>
> @David: My version saves the changes to the column width.
>
> @Luis
>
>> to have more/configurable display precision, also for translations (TrX,
>> TrY, camera). Would help to clone & place missing sky patchs
>>
> Sorry, but this contradict each other. For cloning/place missing sky
> patches you don't need much precision.
>
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Re: [hugin-ptx] Getting Hugin interface to display decimal angular values ( not truncated) in assembly tab

[Fabrice Kerzerho]

@Sean : Many thanks, I'll try it asap . Would be great to be a display
option in expert mode; how can I ask for it?
@Gunter : Cool to discover that someone else need it ; I would increase it
to work with hundredth of degrees : the farthest the objects are in my
panoramas the accuratest I have to be.

On Thu, Nov 9, 2017 at 5:23 AM, Gunter Königsmann <
gunter.koenigsm...@gmail.com> wrote:

> Actually (perhaps because panoramas tend to be quite big, not sure) the
> arrows that change the angle by a full degree at a time always are a little
> bit too coarse to be useless => one Democratic vote from me, too, to
> display another digit and to make the arrows change the angles only by a
> tenth of a degree at a time.
>
> Am 08.11.2017 20:40 schrieb "Sean Greenslade" <s...@seangreenslade.com>:
>
>> On Wed, Nov 08, 2017 at 10:44:12AM +0100, Fabrice Kerzerho wrote:
>> > Hi,
>> >
>> > No, I mean displaying decimal angular values for the whole panorama, not
>> > for each photos; I work in expert mode with a French interface - I may
>> have
>> > done a bad translation. I need accurate angular values to conform a
>> > topographic grid on a panorama, I have to work with decimal values.
>>
>> OK, I think you're referring to the Stitcher tab. Indeed, it does seem
>> to force a rounding to the nearest 0.1 degree. However in my tests, it's
>> purely a display thing. The actual values internally are full precision
>> doubles, so if you type 65.623 into the box, it will use that exact
>> number.
>>
>> If you want to change the display behavior, you'll have to recompule
>> Hugin. The relevant lines are in src/hugin1/hugin/PanoPanel.cpp, in the
>> PanoPanel::UpdateDisplay function:
>>
>> > ...
>> > val = hugin_utils::doubleToString(opt.getHFOV(),1);
>> > m_HFOVText->ChangeValue(wxString(val.c_str(), wxConvLocal));
>> > val = hugin_utils::doubleToString(opt.getVFOV(), 1);
>> > m_VFOVText->ChangeValue(wxString(val.c_str(), wxConvLocal));
>> > ...
>>
>> The second argument in doubleToString is how many decimals to show in
>> the text box. Increasing that should cause the UI to show more decimal
>> points.
>>
>> --Sean
>>
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Re: [hugin-ptx] Getting Hugin interface to display decimal angular values ( not truncated) in assembly tab

[Fabrice Kerzerho]

Hi,

No, I mean displaying decimal angular values for the whole panorama, not
for each photos; I work in expert mode with a French interface - I may have
done a bad translation. I need accurate angular values to conform a
topographic grid on a panorama, I have to work with decimal values.

BR,

On Wed, Nov 8, 2017 at 8:23 AM, David W. Jones  wrote:

> On 11/07/2017 06:41 PM, Sean Greenslade wrote:
>
>> On Tue, Nov 07, 2017 at 12:58:57AM -0800, FabKzo wrote:
>>
>>> Hi all,
>>>
>>> Could it be possible to perform this type of modification in the
>>> interface ?
>>>
>>> In fact I need complete angular datas with decimal values  to work on
>>> panoramas I produce; while all decimal values are considerated  to
>>> calculate panoramas pixel width and height with no problem ( I can apply
>>> a
>>> roll modification of 0.01° , or make a panorama of 32,1 ° vertical angle
>>> ),
>>> I find those values to be rounded too quickly in the interface.
>>>
>>> How can I modify this behavior?
>>>
>>
>> Can you be a more specific about what you're trying to accomplish?
>> Manually editing image positions / angles is a somewhat unusual way of
>> using Hugin. Is the optimizer not producing good results for you?
>>
>> I don't know of any "assembly" tab in Hugin, and the only tab that
>> contains angle data for the individual images is the optimizer tab.
>>
>
> Maybe he means Expert Interface > Photos tab > Display 'Positions'? Shows
> Yaw, Pitch, Roll, X/Y/Z translation, Plane yaw, Plan pitch, Camera
> translation.
>
> The few times I've looked at it when working on a pano, the columns by
> default are too narrow to display the full number of digits, so they
> display a rounded version. When I widen the column enough, all the digits
> show up.
>
> Perhaps Hugin could remember column widths when someone sets them? The
> version I have installed here now (2017.0.0.eac5e8cc546e from Debian
> Testing repository) doesn't.
>
> --
> David W. Jones
> gnomeno...@gmail.com
> wandering the landscape of god
> http://dancingtreefrog.com
>
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Re: [hugin-ptx] Re: Focal length and FOV badly defined in Hugin?

[Fabrice Kerzerho]

Thank you for those explanations, I think that precision is important when
we have to batch a lot of panos; we need the accurate informations to get
the same ratio px/degrees in the resulted pictures, in order to integrate
real elements geo localized (with Gimp or blender for example); this should
help me a lot:-)

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