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Messages - holgar

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General / Re: Reuse Depth Maps
« on: February 16, 2015, 06:14:03 PM »
oh..ok..thats a valid usecase. Thanks for the info.

General / Re: Sparse Cloud: very few Points
« on: February 15, 2015, 10:59:04 PM »
Looks great and it will be interesting to follow your progress.  T

 I am aslo doing scans for game engines, PBR renders and 3D print using Zbrush as  my main app for editinng , UV and retopology. 
Are you planning on using high settings on the dense cloud?  For a project like this i would probably run it at medium.  That way you should be able to run everything in one chunk using less than 32GB of RAM.  Generating the mesh is the stage that sucks up a lot of RAM.  For this you will have too divide in to chunks if you donĀ“t have a lot of RAM. 

Good luck and keep us updated.

Hi Igor,
I have started the Densecloud with High-settings two days ago and I regret it. My memory is full and swaping. The remaining Time has increased since I last checked. It is now still 31 hours to go. I fear it will increase even more. I guess I will have to cancel the process as I need my computer tomorrow to work. :-(.

Next week I will start it again. Maybe with medium settings or with separated chunks. I really wonder why it is taking all my memory. I have 64 GB. And I thought only Meshgeneration takes so much memory.

I have three options to try:
1. Medium settings
2. High settings but Car divided into two or three chunks
3. Jpg images instead of 16 bit tiff.

Do you think the last option would help to reduce memory cosume in densecloud-generation?

General / Dealing with DOF
« on: February 13, 2015, 02:27:27 PM »
Hello, me again with another Question. I hope I can some day give you some valluable Infos on my experiences back ;-).

I would like to scan small Objects. I am considering buying a Canon EF 50mm/ 2,5/ Makro.
Now the Problem with Marco is certainly the shallow DOF. So I wonder how PS is dealing with blurred parts of the images.

I have made a test with proccessing Focus-stacks with a Software called Helicon Focus. The results where very good in PS. But the Process of taking Focusstack Photos is very long. I would prefer to instead take more Photos from different angles and distances.

If I take enough pictures from different angles I assume I will still get good results even with only small parts in Focus.

Another though I had was to make masks based on Sharpness of the images (Photoshop has such a fucntion). Would that help in PS?

My question is how Ps is dealing with blurred parts? Will big unsharp parts of the image reduce quality? Or are thoose part ignored in Recontruction?

General / Re: Reuse Depth Maps
« on: February 13, 2015, 12:18:34 PM »
Thanks for your reply. I fear I still dont fully understand why I would want to reuse the Depthmaps. You could describe a real world Example when I would want to save the Maps and keep them in the Project? It is increasing the Projectsize quite a bit so I would prefer not to keep them.
But I dont want to regret that In case I should need them later.

General / Re: Sparse Cloud: very few Points
« on: February 13, 2015, 03:51:07 AM »
I have processed 10 Cameras of my Imageset with the recommended Setting of Zero Tiepoints. Now I am getting very good results. Calculationtimes have increased a lot. I hope I get the 700 Images processed.

But I am very very happy with the result:

General / Re: Sparse Cloud: very few Points
« on: February 13, 2015, 01:17:43 AM »
Zbrush is awesome for editing scan data so you definitely have chosen a good workflow.   Good luck 

My Goal is to generate a Game-Ready asset with Normal-maps. I hope I can produce a good result. I will keep you informed.

General / Reuse Depth Maps
« on: February 13, 2015, 01:04:05 AM »
there is this option in the preferences to keep depth maps. Also there is the Option in the Denscloud generation Dialog "reuse depth maps".

I wonder how I should use these Options and in which cases I can benefit from these options? I have not found any helpfull info in the documentation.

greetings, Holger

General / Re: Sparse Cloud: very few Points
« on: February 12, 2015, 06:07:13 PM »
Thanks for your Reply Igor. Yes I figured out that too. a very sparse Cloud can surly result in a very dense Cloud.
But I am more precupied about the Alignment-Quality. I fear that so few Valid points in the Sparse cloud can lead to not su accurate Alignment/Optimization.

I will for sure share my results here ;-). Its the biggest Project I have done so far.Postprocessing the mesh in Zbrush will be a Challange.

General / Re: Halfres-Image and Ultra vs. Fullres-Image and High setting
« on: February 12, 2015, 04:27:25 PM »
Thanks for your reply. Right...I haven't considered this. I think I will stick to Fullresimages than.

General / Re: Sparse Cloud: very few Points
« on: February 12, 2015, 03:40:27 PM »
Thanks Alexey, Now I understand better. I will do another Alignment. This will take much longer with TP set to Zero, right?

General / Re: Sparse Cloud: very few Points
« on: February 12, 2015, 03:29:18 PM »
Do you think 40K is a good vallue for Keypoint limit in my case?
Should I try 40K for Keypoints and Zero for Tiepoints?

General / Re: Sparse Cloud: very few Points
« on: February 12, 2015, 03:25:19 PM »
Thanks for your answer.
I will defenetly do another Alignment. I will try zero tiepont-limit.

Just for my Understanding:
I thought the white dots in the Image-View are Keypoints and the Blue Dots are Tiepoints?
But if that is correct I wonder why I have so few Blue Points? I have like only 10 - 20 Blue Points on each Photo.
What is a good number to have per Image?

General / Re: Sparse Cloud: very few Points
« on: February 12, 2015, 03:10:26 PM »
I left the Tiepoint limit on 1000.

General / Sparse Cloud: very few Points
« on: February 12, 2015, 02:36:18 PM »
Hello Agisoft Community,
I have found a pretty cool Object which I want to Scan. It is a burned out Carwreck.
So I waited for the best weather conditions with a cloudy sky and took the photos.
I made 700 Images with 21 Mpixel with my Canon 5DII.

The Images are very sharp and have good quality. Now I run the Alignment and all Cameras aligned fine.
I used the default settings for Keypointlimit of 40k. This morning I checked the result and I am suprprised I got only 12K points in my sparse clould. After doing some filtering I ended up with 1700 Points.

I would have expected much more points with 700 Cameras. Each camera should find 40K Points.

Before I start the Densecloud calculation I would like to ask you if I should try another Alginment with a higher Keypointlimit.  I fear my sparsecloud is way to small.

General / Halfres-Image and Ultra vs. Fullres-Image and High setting
« on: February 11, 2015, 03:17:49 PM »
Hello, I am wondering if anybody has compared Processing time and results with these two Scenarios:

Full-Res image but with High-setting (densecloud)


Halfres-Image (size reduction before importing in PS) and instead Ultra-High setting in Denscloud.

I wonder if performancewise and Qualitywise it makes any Difference. As far as I understood the High-setting downsamples the original image by half. So from my understanding I could also reduce the Resolution before I load into PS. But does that have any advantages? I am wondering if anybody has tested that already?

greetings, Holger

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