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Author Topic: Smart Shooter, Nikon D3200 and noiseprojection.  (Read 41862 times)

Infinite

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Re: Smart Shooter, Nikon D3200 and noiseprojection.
« Reply #30 on: July 03, 2013, 04:23:53 PM »

UV is possibly of interest but i think mainly for motion capture, think using a UV make up diluted down and speckle sprayed on the face then illuminate with "disco style" UV lights or UV canon as we call them http://www.soundsavers.com/shop/all-lighting/special-effects-lighting/uv---blacklight/products/acme-400w-u-v--cannon.html?utm_source=google&utm_campaign=Google+Shopping+Results&utm_medium=Product+Feed&gclid=COT1vvehk7gCFSXMtAodmloAAg
Used in small doses these lights are perfectly safe they are after all certified for disco/show use.

At the end of the day I still think you're better off with just more cameras and white light.


Similar to Mova Contour - http://www.mova.com/

I would be interested to see how the mixture of normal light is with using those ACME 400W and UV converted cameras. i.e. some cameras for UV some for colour.
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jeancampos

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Re: Smart Shooter, Nikon D3200 and noiseprojection.
« Reply #31 on: July 05, 2013, 08:45:30 PM »
Hi Magnus

Incredible same result you had with only 6 cameras, have to understand what I'm doing wrong.

This is a test I did using 10 cameras.

https://dl.dropboxusercontent.com/u/10237587/Artes_Web/Forum/Agisoft/foto% 20% 283% 29.JPG

But alignment centered on each camera is generating much noise in the nose, I'm having trouble with that.

But this result is not correct, I redesigned the space where the scans happen, I built a room all white, and realinhei towers for a set of 180? with 30? spaces each. The cameras are focusing on automatic and ISO 100, with 18 -55 mm lens. Today I will test the new rig, and see.

My dream is to reach ul result close to this:

https://dl.dropboxusercontent.com/u/10237587/Artes_Web/Forum/Agisoft/Grey-Large.jpg

Let us work.

jeancampos

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Re: Smart Shooter, Nikon D3200 and noiseprojection.
« Reply #32 on: July 09, 2013, 06:20:03 AM »
Hello Magnus,

As was previously spoken, We made ??new tests with the new Rig scan in our studio, we use two lighting Daylights (5500K each) + 2 Flashs + 1 Octagon for  inferior lighting. With the following settings: F: 9, 1/20 and ISO 100

https://dl.dropboxusercontent.com/u/10237587/Artes_Web/Forum/Agisoft/Captura%20de%20Tela%202013-07-09%20%C3%A0s%2000.07.30.png

And the preliminary results are very encouraging:

Here are some pictures:

https://dl.dropboxusercontent.com/u/10237587/Artes_Web/Forum/Agisoft/Captura%20de%20Tela%202013-07-08%20%C3%A0s%2023.48.59.png

https://dl.dropboxusercontent.com/u/10237587/Artes_Web/Forum/Agisoft/Captura%20de%20Tela%202013-07-08%20%C3%A0s%2023.48.49.png

Unfortunately the number of points is not sufficient to capture fine details of the skin, can at most 11,000 cloud points:

https://dl.dropboxusercontent.com/u/10237587/Artes_Web/Forum/Agisoft/Captura%20de%20Tela%202013-07-08%20%C3%A0s%2023.49.35.png

Whereas these shots are not using the projector, I wonder how we can capture more points without using noiseprojection.

There were some problems in the neck, under the chin, had to take the intense noise in Zbrush, I could not resist and did a quick render in Modo, no pretense, rs:

https://dl.dropboxusercontent.com/u/10237587/Artes_Web/Forum/Agisoft/Captura%20de%20Tela%202013-07-08%20%C3%A0s%2023.47.51.png

Cheers

Jean campos

mala

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Re: Smart Shooter, Nikon D3200 and noiseprojection.
« Reply #33 on: July 09, 2013, 01:40:52 PM »
Hi Jean,

Interesting results for such few cameras.

In regard to fine details of the skin, I think you will struggle to ever acheive the fine detail in the Ten24 picture (example you posted in the your previous post) using Photoscan alone.

I'm 99% sure that the fine detail in that image comes from using the texture(with some tweaks) to emboss those fine details into the mesh in ZBrush.

In terms of the number of points Photoscan is matching in your photos, you have a few things that are maybe not helping

- The subject appears to have foundation make up applied to his face(and some on the hat!) maybe you have done this to reduce reflections but it also gives a smooth even texture which makes it harder for Photoscan to find points in that area....and therefore less fine detail.
I would suggest using a polarising filter instead to reduce the reflections.

- The jumper/ sweatshirt has a very distinct pattern, in my experience this means that Photoscan will use up more of the points (you have set as the limit) to build that part of the subject.

Cheers,
Mala


Magnus

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Re: Smart Shooter, Nikon D3200 and noiseprojection.
« Reply #34 on: July 13, 2013, 01:59:55 AM »
Hello!

Thanks for the heads-up and information mala and Lee!

Jean, great to see your tests! I think your results are starting to look pretty good.
By zooming in (or moving closer) one can get good detail in the mesh but ofcourse there is the problem of depth of field and processing times if going Ultra High (coverage is even more important too).
I will see if I can put together some examples because when I've tried with different ratios one can actually see how the noise changes in the mesh.
We are aiming for a decent enough mesh (without too much noise so as to simplify cleanup) and then get the fine details from the textures (as mala pointed out about Ten24 pic).

Best, Magnus.