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Author Topic: PhotoScan ignoring most pics from the chunk after alignment  (Read 6579 times)

Malco

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PhotoScan ignoring most pics from the chunk after alignment
« on: November 17, 2014, 10:16:51 PM »



Hi everyone.

I've been playing with the DEMO version of PhotoScan to give it a try for a future project I'm working on.


I have taken more than 30 pics of the object I want to reconstruct but everytime happens me the same, after making the masks for each individual picture and align the whole photoset, PhotoScan just ignores sometimes half of the pictures within the photoset adding a "NA" sufix after the name of each ignored picture file.

I though it was because of ilumination, thinking that probably the ocluded part of the figure was to dark or dimly lit, but after proper ilumination stil NO luck and same results; PhotoScan just shows a half circle camera travel instead of the 360 travel around the object that was made onsite.



What I have tried so far:


-Taking the pictures under better/controlled light.

-Doubling the picture count.

-Circle the entire figure with pics (360 travel around the object).

-Tried inverting all the masks of the photoset.

-Using a white background to ease/speed up the masking process (Worst results yet).



All the pics imported into PhotoScan have EXIF data intact, images were not resized, rotated or manipulated in any way.

After reading the PDF manual I'm out of ideas!
What am I doing wrong?



Alexey Pasumansky

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Re: PhotoScan ignoring most pics from the chunk after alignment
« Reply #1 on: November 17, 2014, 10:46:56 PM »
Hello Malco,

Maybe you can post an example of the image from the set, so that we can understand what type of object you are trying to reconstruct?
Best regards,
Alexey Pasumansky,
Agisoft LLC

Malco

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Re: PhotoScan ignoring most pics from the chunk after alignment
« Reply #2 on: November 18, 2014, 12:19:52 AM »


Hi Alexey.

The figures I'm trying to reconstruct are action figures, here are two examples.

Complete photoset is about 37 and 46 pics for each figure.

PD: Attached images were resized to comply with maximum picture size allowed in the forum.

Thanks for your quick response and help.


James

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Re: PhotoScan ignoring most pics from the chunk after alignment
« Reply #3 on: November 18, 2014, 01:26:11 AM »
Did you try without masking?

Malco

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Re: PhotoScan ignoring most pics from the chunk after alignment
« Reply #4 on: November 18, 2014, 01:49:08 AM »

Hi James, thanks for your reply.

I assumed that in order to align the picture set a mask was always necesary to better reconstruct the figure, I just tried to align without masks, same results, half of the picture set is not used ("NA at the end of unused file")...


Alexey Pasumansky

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Re: PhotoScan ignoring most pics from the chunk after alignment
« Reply #5 on: November 18, 2014, 02:25:10 AM »
Hello Malco,

Thanks for sharing the image.

For me it seems that the alignment should be successful, at least by the background. So probably you can provide us (to support@agisoft.com) the compete dataset or send the project saved after Align Photos stage in High accuracy mode?
Best regards,
Alexey Pasumansky,
Agisoft LLC

Malco

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Re: PhotoScan ignoring most pics from the chunk after alignment
« Reply #6 on: November 18, 2014, 07:56:51 PM »
Thanks Alexey for the support.

Since I'm testing the demo version I can't save the file, by the compete dataset you mean the whole photoset?

I can send you all the pics, please confirm if this is what you are asking for.
...

Alexey Pasumansky

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Re: PhotoScan ignoring most pics from the chunk after alignment
« Reply #7 on: November 18, 2014, 09:55:45 PM »
Hello Malco,

Yes, I meant the original images that you are using.

Note that you can request a 30-day Trial for PhotoScan Pro on the following page: http://www.agisoft.com/downloads/request-trial/
In this case you'll be able to save the project and use export features.
Best regards,
Alexey Pasumansky,
Agisoft LLC

Malco

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Re: PhotoScan ignoring most pics from the chunk after alignment
« Reply #8 on: November 19, 2014, 04:04:59 AM »

Ok, I have sent you an email with 2 complete photosets.

With these photosets I've experienced the same issues, instead of a 360 photo travel all I got is half the pictures after aligment (a 180 photo travel).

All pictures within the photoset are unmodified with the complete EXIF data.

Also already requested a 30 day trial from the link you provided.

Many thanks for your help.


Alexey Pasumansky

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Re: PhotoScan ignoring most pics from the chunk after alignment
« Reply #9 on: November 19, 2014, 02:17:44 PM »
Hello Malco,

Thank you for providing the data, I've sent you the processed projects back.
Best regards,
Alexey Pasumansky,
Agisoft LLC

Malco

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Re: PhotoScan ignoring most pics from the chunk after alignment
« Reply #10 on: November 20, 2014, 06:09:16 AM »

Thanks Alexey, I  reshoot following your advice and well everything worked as expected.

In case anyone encounters this same problem here is what you can do to get a proper 3D reconstruction from your pics:

1- Good light is the key, avoid hard shadows or shooting against the light (My first mistake!).
2- Overlap is good the more overlap the better.
3- Use at least 60 pics, my first good reconstruction I used around 130 pics.

With a good photoset I did not needed the use of any masks, PhotoScan did all the job after a few minutes.

Hope this tips helps someone.