Agisoft Metashape

Agisoft Metashape => General => Topic started by: Superxiong on April 23, 2020, 05:42:52 PM

Title: Failed to align
Post by: Superxiong on April 23, 2020, 05:42:52 PM

Hi, I am trying to create a model of an ukulele.

I masked the background, clicked "tie to keypoints", but only a few cameras aligned. This is strange cos this method used to work for my other model.  May I ask if there are not enough pictures, or what's the problem...?

My dataset is here: https://photos.app.goo.gl/PXnurCBpZnAK57f19

Appreciate your help!

Title: Re: Failed to align
Post by: Alexey Pasumansky on April 23, 2020, 07:14:32 PM

Hello Superxiong,

I think that the problem could be related to the object specifics itself - the surface is quite reflective. Also some images are noisy and partially out of focus.

Title: Re: Failed to align
Post by: bestable on April 23, 2020, 08:51:38 PM

and it is not on tripod, but every frame (and especially empty background) are of different position in space

Title: Re: Failed to align
Post by: Alexey Pasumansky on April 24, 2020, 01:44:37 AM

Quote from: bestable on April 23, 2020, 08:51:38 PM

and it is not on tripod, but every frame (and especially empty background) are of different position in space

It shouldn't be very critical for Tie Point masking option. But in this given case, there are too few tie points detected on the object surface itself, therefore the cameras cannot be aligned properly.

Title: Re: Failed to align
Post by: Superxiong on April 27, 2020, 05:58:22 PM

Thanks for the replies I appreciate them! I re-took my pictures. There are 180 of them. https://photos.app.goo.gl/dQbiKShhi7DLDWzw8

The surface looks fine, but the strings and the pegs are difficult to be modelled. The strings look as if they have merged on the board. The hole becomes bulging up, and the pegs don't look very nice.

Do any of you have any tip to solve these issues? Is it better to put them in several chunks and merge them? Or I should just try another object...?