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Author Topic: Tie Points = Great! Dense Cloud = Super BAD!  (Read 605 times)

olivierth

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Tie Points = Great! Dense Cloud = Super BAD!
« on: December 03, 2017, 08:37:33 PM »
Hi!

I'm trying Photoscan on a rock with a total of 44 photo done on a cloudy day.

When I align photos, I get a great Tie Points result that look exactly like the rock. Only 2 photos were not aligned.  But when I build the Dense Cloud, the result is a bit exploded. 

I've tried different Depth Filtering but the result is always the same.

One odd thing I noticed is that the alignement (Tie Points) was done using the mask I did manually within Photoscan but the dense cloud looks like it did not use the masks. You can see on the dense cloud the white pole I used to hold the rock but that I masked out.

I'm using Agisoft PhotoScan Standard Version 1.3.4 build 5067 (64bit).  I've got an i7, 32Gb ram and a gtx 1070.
« Last Edit: December 03, 2017, 08:40:34 PM by olivierth »

Alexey Pasumansky

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Re: Tie Points = Great! Dense Cloud = Super BAD!
« Reply #1 on: December 03, 2017, 09:00:59 PM »
Hello olivierth,

You need to invert masks, currently the object is masked and the background - isn't. So only background data would be used for the dense cloud generation process.
Best regards,
Alexey Pasumansky,
AgiSoft LLC

olivierth

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Re: Tie Points = Great! Dense Cloud = Super BAD!
« Reply #2 on: December 03, 2017, 09:04:49 PM »
DOOOOOHHHHHHH!!!!!!!!!

hahaha! Thanks!

Well, it's interesting to see that the alignment (Tie Points) don't use the masks at all.

The more you know!

...is there a way to tag a this tread as SOLVED ?


Alexey Pasumansky

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Re: Tie Points = Great! Dense Cloud = Super BAD!
« Reply #3 on: December 03, 2017, 09:06:17 PM »
Hello olivierth,

For the alignment the use of masks is optional - there's "Constrain features by masks" option in the Align Photos dialog.
Best regards,
Alexey Pasumansky,
AgiSoft LLC