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Messages - FLuca

Pages: [1] 2 3 4
1
General / Re: Masked areas generated in texture
« on: January 30, 2018, 07:14:39 PM »
+1 for this feature to be active again

or at least an option to activate/deactivate the masking in the texture setting overlay

2
General / Re: Issue when scaling model with camera relative postions
« on: January 08, 2018, 12:23:08 PM »
thanks for your answer

after several testing I found that the camera position in photoscan is corresponding to the entrance pupil of the camera/lens

when using the figures as defined in the nodal ninja database https://wiki.panotools.org/Entrance_Pupil_Database I found that the measure distance is correct

but as you mentioned, I now take a reference shoot with a visible scale and use the value for the other shoots

3
General / Re: How to share a 3d textured model on a website?
« on: December 04, 2017, 01:52:02 PM »
Hi mrafiei,

To embed your models without using third party websites, I think you should look to Unity.

But it requires Unity knowledges and some development to allow the interaction you want.


4
General / Issue when scaling model with camera relative postions
« on: December 04, 2017, 01:46:11 PM »
Hello Guys,

I am confused with poor result in scaling 3D models.

Instead of taking reference measurements on the model, which is not very precise on human body, or marker on the ground, I wanted to use the camera relative distance.
On my rig this distance is fixed and larger than any feature that can be reconstructed so I expected to have more precise scaling than using object feature.

So I scanned a wood chunk 8x8cm large with a camera distance of around 2 meters from each other.
The result is very disapointing. The resulting model is about 8.5% larger than reality.

Even with unprecised measurement of the camera positions, I expected only few %

My questions are:

What does the camera position represent in photoscan: focal point, sensor center, ... ?

Did any of you used this method with success ?

Any tip welcome



5
@ArtKru
Considering the glossiness of ceramic, you have pretty good results.
You will never have perfect mesh out of scanning process, you have to finish it manually.
From my humble experience, scanning and calculating a model is only 20-25% of the time required to generate a finished model.
After photoscan you have to crop the model, remove unwated mesh, close the holes, then retopologise, re-sculpt, remove the noise and correct the texture(s).

6
with smartshooter you can setup the cams parameters and download the images directly to the computer without needing the cards.
however it can not be used for synchronous triggering as it uses USB and each cams is triggered one after the other
the speed of cards or speed of download influence only the time between two shots. this time is reduced with cards but requires many manual operation.

7
Face and Body Scanning / Re: Distorted feet
« on: June 23, 2016, 05:57:11 PM »
Hi Garyb,
hard to advise without a screenshot
maybe depth of field issue ?

8
Face and Body Scanning / Re: Megapixels vs. Quantity
« on: June 23, 2016, 05:49:20 PM »
From my experience I would say that more cams is better than more resolution.
With only 50 cams you will be very limited in the model pose or you will have to change camera positions to have the minimum occluded areas.
The more cams you have, the less you have to reconstruct the areas not seen by at least 2 cams.

9
Face and Body Scanning / Re: children scan
« on: June 23, 2016, 05:40:19 PM »
Very nice and clean scans !
bravo

10
Face and Body Scanning / Re: Sony a6000 for Full Body Scan Rig
« on: April 20, 2016, 05:44:56 PM »
I hope for you that the USB cable they provide with the camera have all pins connected, like that you can hack it.
Because it will be hard to find these specific connectors with 10 pins instead of 5 in the regular micro-USB connectors.
Relays are a good option, but requires a lot of wiring or printed boards for 50 cams as 2 contacts are usually required to trigger the cam (focus + shoot)
I have developed my own boards and it works very well.

11
Face and Body Scanning / Re: Sony a6000 for Full Body Scan Rig
« on: April 20, 2016, 02:59:29 PM »
Yes triggering might be an issue, the only connector available for remote control is a micro USB hence you need an 'intelligent' electronic triggering system instead of simple switches on Canon cameras.
And with USB, unless you have one dedicated electronic triggering system for each camera, forget about sync triggering as as far as I know and my experiments, USB is a peer-to-peer communication and does not allow broadcast signal to trigger all. With 50 cams, you will wait a long time between the first and last cam triggering.
If I were you I would also be concerned about camera setting control and image download
The only option I have found for tethering this cam is the sony provided software (limited and does it support multi-cams?) and lightroom with additional plugin.
But the best thing is that you buy your dream cam and try by-yourself
Good luck
Fred

12
+1 on full explanation of the camera optimise parameters
on each model I have a different proposition and don't know if I should trust it or select more parameters
also I would like to know if it does make sense to perform several optimisation like in the following scenario:
- align cameras
- delete bad points in the sparse cloud
- optimise
- deleted new bad points in the sparse cloud
- optimise
- etc

13
General / Re: New marketplace for your 3D scans {SnapTank}
« on: April 19, 2016, 05:10:21 PM »
sketchfab works well but would requires to specifically generate low poly models and associated normal maps for each of your proposed model -> internal development or additional requirement for the uploaders
in addition for the moment, whatever your subscription, you cannot have embedded models if they are not in public mode hence you cannot control where the models are displayed over the internet
maybe you could use unity

14
General / Re: New marketplace for your 3D scans {SnapTank}
« on: April 19, 2016, 04:12:43 PM »
Hi Ross,
Nice initiative !
However I still find that the the royalties are too high, especially when you compare to what you can expect with gumroad.
I have looked at your website, that works well, except that the preview images suffer from a lack of resolution when entering in zoom mode (with mouse flying over the image), making the function useless.
I may try it in the near future, but I have first to change the face of my life models to respect their privacy.
Regards
Fred

15
General / Re: Extreme distortion of the sparse cloud using masks?
« on: April 19, 2016, 03:43:09 PM »
Hi Jerry,
It would be nice to have a picture of the statue to confirm my words but I suspect that the statue is shinny or specular. In this case, the camera alignement has been made properly due to the environment points.
When you have restricted the matching points to the statue with your masks, there where not enough matching or many wrong matching resulting in bad camera alignment.
In your specific case, I think it is preferable to keep the environment for alignment, or limit the masked area to unfocused areas, such as out of DOF, or changed areas such as people moving around.
Good luck and send screenshot of you final model


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