Re: [hugin-ptx] Help!!! Hugin not stitching correctly with fisheye lens

2018-09-09 Thread T. Modes 


Am Sonntag, 9. September 2018 10:22:30 UTC+2 schrieb Groogle:
>
> > The first one is due to the check of plausibility of the EXIF data. This 
> > was too hard. I relaxed the check. 
>
> What was the issue?  The Exif data looked fine to me. 
>
The EXIF data were fine. But Hugin does some checks for plausibility 
instead of blindly trusty them. This check was to hard - as I already 
wrote. It did also reject valid data. Now the check is relaxed.

>
> > The second one is no bug. If you don't crop the black border, this is 
> was 
> > you get - GIGO. 
>
> This has nothing to do with the border.  Did you check the images to 
> which I referred?  They're completely wrong, nothing like the stitched 
> result. 
>
It did test with the images. These (input) images clearly need a crop - the 
black border needs to be cropped, because the image circle does not cover 
the full sensor/image. Otherwise the black border is also used for the 
calculations. And this crop is saved in the database. This has nothing to 
do with crop of the final panorama - these are 2 different things.
With these images you need to set the lens projection to circular fisheye 
and crop all images to the image circle. When you then run the assistant 
the preview looks fine. (Without cropping the preview gets the big black 
areas you observed.)


> > (Using the crop has the advantage that the crop is remembered when 
> > you stitch a project and then loaded automatically when you load 
> > images from the same lens the next time.) 
>
> There seems to be a discontinuity here.  I crop completed panos, not 
> individual images.  Are you talking about the latter? 
>
Yes, see above.

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Re: [hugin-ptx] Help!!! Hugin not stitching correctly with fisheye lens

2018-09-09 Thread Greg 'groggy' Lehey 
On Thursday,  6 September 2018 at  8:58:30 -0700, T. Modes wrote:
> Hi Greg,
> Am Donnerstag, 6. September 2018 07:12:04 UTC+2 schrieb Groogle:
>>
>> TO HUGIN DEVELOPERS: It seems to me that there are bugs involved here,
>> possibly relating to circular fisheye lenses.  I take photos with full
>> frame fisheyes on a regular basis, and though I have issues that may
>> be related (and which I will report when I have investigated
>> sufficiently), I have never seen anything like this.  In particular
>> the lack of recognition of the field of view and the the initial
>> panorama previews look like bugs to me.
>
> The first one is due to the check of plausibility of the EXIF data. This
> was too hard. I relaxed the check.

What was the issue?  The Exif data looked fine to me.

> The second one is no bug. If you don't crop the black border, this is was
> you get - GIGO.

This has nothing to do with the border.  Did you check the images to
which I referred?  They're completely wrong, nothing like the stitched
result.

> (Using the crop has the advantage that the crop is remembered when
> you stitch a project and then loaded automatically when you load
> images from the same lens the next time.)

There seems to be a discontinuity here.  I crop completed panos, not
individual images.  Are you talking about the latter?

Greg

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Re: [hugin-ptx] Help!!! Hugin not stitching correctly with fisheye lens

2018-09-06 Thread jiangjiayao 
Great! Thanks a lot for the explanation!


On Thursday, September 6, 2018 at 12:24:57 PM UTC-5, T. Modes wrote:
>
>
>
> Am Donnerstag, 6. September 2018 18:15:03 UTC+2 schrieb jiang...@gmail.com
> :
>>
>> but I still have a question. saved to the database meaning saved to my 
>> computer? 
>>
> Yes.
>  
>
>> if so, I have loaded and stitched those photos for like a dozen times 
>> already, how come it doesn't recognize them before?
>>
> Before saving there are some checks done to prevent storing obviously 
> wrong values. So maybe the checks failed in the first runs.
> Or when you tested without crop then the crop information was removed from 
> the db.
>

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Re: [hugin-ptx] Help!!! Hugin not stitching correctly with fisheye lens

2018-09-06 Thread T. Modes 


Am Donnerstag, 6. September 2018 18:15:03 UTC+2 schrieb jiang...@gmail.com:
>
> but I still have a question. saved to the database meaning saved to my 
> computer? 
>
Yes.
 

> if so, I have loaded and stitched those photos for like a dozen times 
> already, how come it doesn't recognize them before?
>
Before saving there are some checks done to prevent storing obviously wrong 
values. So maybe the checks failed in the first runs.
Or when you tested without crop then the crop information was removed from 
the db.

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Re: [hugin-ptx] Help!!! Hugin not stitching correctly with fisheye lens

2018-09-06 Thread jiangjiayao 
ok, good to know! 

but I still have a question. saved to the database meaning saved to my 
computer? if so, I have loaded and stitched those photos for like a dozen 
times already, how come it doesn't recognize them before?

JJ


On Thursday, September 6, 2018 at 11:00:11 AM UTC-5, T. Modes wrote:
>
>
>
> Am Donnerstag, 6. September 2018 17:37:22 UTC+2 schrieb jiang...@gmail.com
> :
>>
>> Another weird thing is that Hugin automatically filled out the lens info 
>> correctly, it also figured out the correct crop area, which I have to 
>> manually to them before.
>>
>
> Nothing weird here. This is exactly what Hugin should done. The lens 
> settings are saved in a database when you stitch a pano. When you now add 
> images to a new project the settings are read from the database.
>
> Thomas
>

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Re: [hugin-ptx] Help!!! Hugin not stitching correctly with fisheye lens

2018-09-06 Thread T. Modes 


Am Donnerstag, 6. September 2018 17:37:22 UTC+2 schrieb jiang...@gmail.com:
>
> Another weird thing is that Hugin automatically filled out the lens info 
> correctly, it also figured out the correct crop area, which I have to 
> manually to them before.
>

Nothing weird here. This is exactly what Hugin should done. The lens 
settings are saved in a database when you stitch a pano. When you now add 
images to a new project the settings are read from the database.

Thomas

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Re: [hugin-ptx] Help!!! Hugin not stitching correctly with fisheye lens

2018-09-06 Thread T. Modes 
Hi Greg,
Am Donnerstag, 6. September 2018 07:12:04 UTC+2 schrieb Groogle:
>
> TO HUGIN DEVELOPERS: It seems to me that there are bugs involved here, 
> possibly relating to circular fisheye lenses.  I take photos with full 
> frame fisheyes on a regular basis, and though I have issues that may 
> be related (and which I will report when I have investigated 
> sufficiently), I have never seen anything like this.  In particular 
> the lack of recognition of the field of view and the the initial 
> panorama previews look like bugs to me. 
>

The first one is due to the check of plausibility of the EXIF data. This 
was too hard. I relaxed the check.
The second one is no bug. If you don't crop the black border, this is was 
you get - GIGO.

(Using the crop has the advantage that the crop is remembered when you 
stitch a project and then loaded automatically when you load images from 
the same lens the next time.)

Thomas

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Re: [hugin-ptx] Help!!! Hugin not stitching correctly with fisheye lens

2018-09-06 Thread jiangjiayao 
Just a follow up on the previous discussion. I have tried 3 different 
methods this morning.

   1. crop without masks (exactly the same as original post), quality is 
   still bad as expected.
   2. crop with masks, the output is bad as well.
   3. masks without crop (from Greg's pto file), the output is not bad 
   (same as Greg's), but it still looks bad in hugin preview.

Another weird thing is that Hugin automatically filled out the lens info 
correctly, it also figured out the correct crop area, which I have to 
manually to them before.

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Re: [hugin-ptx] Help!!! Hugin not stitching correctly with fisheye lens

2018-09-06 Thread jiangjiayao 


On Thursday, September 6, 2018 at 12:12:04 AM UTC-5, Groogle wrote:
>
> On Wednesday,  5 September 2018 at 12:43:40 -0700, jiang...@gmail.com 
>  wrote: 
> On Wednesday,  5 September 2018 at 12:55:36 -0700, jiang...@gmail.com 
>  wrote: 
>
> Once is enough,especially since you included relatively large images 
> (for email).  It would have been better to put all the images on your 
> Google Drive page. 
>
 

> I posted it once but didn't see it on the website, so posted it again. I 
> realized the post has to be approved after the second try. 
>
 

> > I have 4 pictures taken using canon 5d mark ii and 8mm fisyeye lens. 
> files 
> > can be found 
> > here, 
> https://drive.google.com/drive/folders/1HpG0k7f9Zg8L-W3fuVrItYqtvZpLNRgY?usp=sharing
>  
> > 
> > I followed the simple steps on hugin, but the final output looks awful. 
> > 
> > [image: IMG_0429 - IMG_0432.jpg]  
>
> Indeed, this is not good.  I've put a copy at 
> http://www.lemis.com/grog/Photos/20180906/small/IMG_0429---IMG_0432.jpeg 
> for anybody who is interested in checking. 
>
> > In contrast, ptgui has no major issues at all. 
> > [image: IMG_0429 Panorama.jpg]  
>
> This is better, but still not good.  Copy at 
> http://www.lemis.com/grog/Photos/20180906/small/IMG_0429-Panorama.jpeg. 
> There are clear discontinuities round the frame of the “Chicago" 
> poster on the left. 
>
> > Can anyone help and tell me what I was doing wrong? and how can I 
> > improve the quality? 
>
> This is really very puzzling.  I downloaded the images and stitched 
> them.  I expected problems, and I got them.  But they were in no way 
> related to your problems.  Some look like Hugin bugs: 
>
> 1.  The Exif data clearly show: 
>
> File IMG_0429.JPG 
> Date taken: Friday, 24 August 2018, 21:12:58 
> Exposure:   1/4 sec, f/4.0 (EV 6.0), 29/640 ISO 
> Camera: Canon Canon EOS 5D Mark II 
> Lens:   Canon EF 8-15mm f/4L Fisheye USM 
> Focal length:   8.0 mm (full frame equivalent: 8 mm) 
>
> But Hugin still asks for a crop factor.  That shouldn't be 
> necessary.  I put in 1, of course.  Did you?  That might be part 
> of the problem. 
>

Yeah, I selected circular fisheye and put 1 for crop factor. 
 

> 2.  I set "circular fisheye" in the Assistant, and it located control 
> points relatively well, a maximum error of 4.6.  But the fast 
> panorama preview looked terrible, full of black: 
> http://www.lemis.com/grog/Photos/20180906/Hugin-1.png.  I tried a 
> normal panorama preview and got the same thing. 
>
> I even manually added couple control points myself, but preview still 
looks terrible. 
I thought it might be showing me pre-blending image, so I decided 
to stitch it anyway.


> 3.  I stitched the panorama anyway, and got a panorama still with 
> black areas, but not nearly as much: 
> 
> http://www.lemis.com/grog/Photos/20180906/small/IMG_0429-IMG_0432-2.jpeg 
>
> 4.  The disturbance was clearly related to the panorama head reaching 
> into the image, so I masked that off.  And then, without any 
> further problems, I was able to stitch a reasonable panorama: 
> http://www.lemis.com/grog/Photos/20180906/small/IMG_0429-IMG_0432.jpeg. 
>
> Clearly it needs cropping, but I deliberately didn't do so. 
>
> I did crop all the pics, and I the areas left are the same as 
ptgui. which left the pano head IN.
I will try it again to left those out. and I will let you know how 
it goes.

All of these images are available at 
> http://www.lemis.com/grog/photos/Photos.php?dirdate=20180906 
> 
>  
>
> I can't see any discontinuities in the final panorama, and I did 
> absolutely nothing to avoid them.  So I'm really puzzled how you ended 
> up with such poor results.  The project file is at 
> http://www.lemis.com/grog/Photos/20180906/IMG_0429-IMG_0432.pto.  Try 
> it and see what you get. 
>
> TO HUGIN DEVELOPERS: It seems to me that there are bugs involved here, 
> possibly relating to circular fisheye lenses.  I take photos with full 
> frame fisheyes on a regular basis, and though I have issues that may 
> be related (and which I will report when I have investigated 
> sufficiently), I have never seen anything like this.  In particular 
> the lack of recognition of the field of view and the the initial 
> panorama previews look like bugs to me. 
>
> Greg 

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>


Thank you very much Greg! 

JJ  

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Re: [hugin-ptx] Help!!! Hugin not stitching correctly with fisheye lens

2018-09-05 Thread Greg 'groggy' Lehey 
On Wednesday,  5 September 2018 at 12:43:40 -0700, jiangjia...@gmail.com wrote:
On Wednesday,  5 September 2018 at 12:55:36 -0700, jiangjia...@gmail.com wrote:

Once is enough,especially since you included relatively large images
(for email).  It would have been better to put all the images on your
Google Drive page.

> I have 4 pictures taken using canon 5d mark ii and 8mm fisyeye lens. files
> can be found
> here, 
> https://drive.google.com/drive/folders/1HpG0k7f9Zg8L-W3fuVrItYqtvZpLNRgY?usp=sharing
>
> I followed the simple steps on hugin, but the final output looks awful.
>
> [image: IMG_0429 - IMG_0432.jpg] 

Indeed, this is not good.  I've put a copy at
http://www.lemis.com/grog/Photos/20180906/small/IMG_0429---IMG_0432.jpeg
for anybody who is interested in checking.

> In contrast, ptgui has no major issues at all.
> [image: IMG_0429 Panorama.jpg] 

This is better, but still not good.  Copy at
http://www.lemis.com/grog/Photos/20180906/small/IMG_0429-Panorama.jpeg.
There are clear discontinuities round the frame of the “Chicago"
poster on the left.

> Can anyone help and tell me what I was doing wrong? and how can I
> improve the quality?

This is really very puzzling.  I downloaded the images and stitched
them.  I expected problems, and I got them.  But they were in no way
related to your problems.  Some look like Hugin bugs:

1.  The Exif data clearly show:

File IMG_0429.JPG
Date taken: Friday, 24 August 2018, 21:12:58
Exposure:   1/4 sec, f/4.0 (EV 6.0), 29/640 ISO
Camera: Canon Canon EOS 5D Mark II
Lens:   Canon EF 8-15mm f/4L Fisheye USM
Focal length:   8.0 mm (full frame equivalent: 8 mm)

But Hugin still asks for a crop factor.  That shouldn't be
necessary.  I put in 1, of course.  Did you?  That might be part
of the problem.

2.  I set "circular fisheye" in the Assistant, and it located control
points relatively well, a maximum error of 4.6.  But the fast
panorama preview looked terrible, full of black:
http://www.lemis.com/grog/Photos/20180906/Hugin-1.png.  I tried a
normal panorama preview and got the same thing.

3.  I stitched the panorama anyway, and got a panorama still with
black areas, but not nearly as much:
http://www.lemis.com/grog/Photos/20180906/small/IMG_0429-IMG_0432-2.jpeg

4.  The disturbance was clearly related to the panorama head reaching
into the image, so I masked that off.  And then, without any
further problems, I was able to stitch a reasonable panorama:
http://www.lemis.com/grog/Photos/20180906/small/IMG_0429-IMG_0432.jpeg.
Clearly it needs cropping, but I deliberately didn't do so.

All of these images are available at
http://www.lemis.com/grog/photos/Photos.php?dirdate=20180906

I can't see any discontinuities in the final panorama, and I did
absolutely nothing to avoid them.  So I'm really puzzled how you ended
up with such poor results.  The project file is at
http://www.lemis.com/grog/Photos/20180906/IMG_0429-IMG_0432.pto.  Try
it and see what you get.

TO HUGIN DEVELOPERS: It seems to me that there are bugs involved here,
possibly relating to circular fisheye lenses.  I take photos with full
frame fisheyes on a regular basis, and though I have issues that may
be related (and which I will report when I have investigated
sufficiently), I have never seen anything like this.  In particular
the lack of recognition of the field of view and the the initial
panorama previews look like bugs to me.

Greg
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