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Messages - R2DS

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1
General / Re: Problem with builds in orthophoto
« on: December 07, 2017, 08:08:45 PM »

R2DS if i fly with 600m 80 /70 is better then fly 200m 80 /70 ?  tks again :D

I tried to draw the situation of doing photogrammetry with mixed ground (flat surface and elevation).
The red triangle shows, why you have less overlap at the point of elevation.

So normally, if it's possible you should fly higher in the region of elevation.

2
General / Re: Problem with builds in orthophoto
« on: December 07, 2017, 05:57:27 PM »
You have this problem because of insufficient overlap. If you fly above buildings, which are logically higher than the ground, you will have less overlap, because your camera is much closer to the building(s). So if you were flying with an overlap of 80% front and e.g. just 50% sidelap, you should go for 80/70 or 80/80%. The more overlap your pictures have, the better results you reach. An alternative solution is to fly higher, but then you will have worse resolution on the ground.

3
General / Re: DenseCloud generation - CPU or GPU important?
« on: December 04, 2017, 10:07:50 AM »
Hello Daniel,

The first phase - depth maps calculation, can be boosted with GPU, the second step - dense cloud filtering is CPU-only dependent.

Hi Alexey,

here are the Processing Parameters with "Mdium/Aggressive" Densecloud settings.
So what do you think?


Processing Parameters

General

Cameras 967
Aligned cameras 967
Markers 14
Shapes
Polygons 3
Coordinate system WGS 84 (EPSG::4978)
Coordinate system WGS 84 / UTM zone 32N (EPSG::32632)
Rotation angles Yaw, Pitch, Roll
Point Cloud
Points 353,572 of 2,884,665
RMS reprojection error 0.083636 (0.559126 pix)
Max reprojection error 0.17679 (17.8943 pix)
Mean key point size 5.2442 pix
Effective overlap 3.99894
Alignment parameters
Accuracy High
Generic preselection Yes
Key point limit 40,000
Tie point limit 20,000
Matching time 33 minutes 59 seconds
Optimization parameters
Parameters f, b1, b2, cx, cy, k1-k4, p1, p2
Fit rolling shutter Yes
Optimization time 35 seconds
Dense Point Cloud
Points 38,148,330
Reconstruction parameters
Quality Medium
Depth filtering Aggressive
Depth maps generation time 22 minutes 31 seconds
Dense cloud generation time 5 hours 44 minutes
Model
Faces 7,629,465
Vertices 3,817,024
Texture 4,096 x 4,096, uint8
Reconstruction parameters
Surface type Arbitrary
Source data Dense
Interpolation Enabled
Quality Medium
Depth filtering Aggressive
Face count 7,629,666
Processing time 19 minutes 25 seconds
Texturing parameters
Mapping mode Generic
Blending mode Mosaic
Texture size 4,096 x 4,096
Enable color correction No
Enable hole filling Yes
UV mapping time 1 minutes 26 seconds
Blending time 1 hours 29 minutes
Software
Version 1.3.4 build 5067
Platform Windows 64

4
General / Re: DenseCloud generation - CPU or GPU important?
« on: December 02, 2017, 04:34:58 PM »
Hello Daniel,

Do you have any projects processed by this configuration? Can you post the processing time values for all the stages, so that it would be possible to understand better, which steps are taking the longest time.

Hi Alexey,

I will show you some reports. But do you not have an answer for the question, which of them is more important for generating Densecloud. CPU or GPU? Some people say CPU, some GPU and other peoples say both of them.
Holy cow... what is right?? Is it better to buy new CPU or GPU?? I mean just for processing DenseCloud. I can't understand that there is no simple answer to find. Nowhere =(

5
General / DenseCloud generation - CPU or GPU important?
« on: December 01, 2017, 12:31:05 PM »
Hi @ all,

simple question. What is more important for generating DenseClouds?
CPU or GPU??

Currently I'm using i7-5930K CPU and Geforce GTX 980 ti GPU.

For huge projects with >1.000 Pictures of buildings, I have processing times of more than 48 - 72h with "High/Moderate" Settings e.g..

So should I go for new GPU like 1080 ti or new CPU like Threadripper 1950X?

Thank you for you help! It's really urgent!

Regards
Daniel

 

6
General / Re: Which is the best workflow to create thermal orthomosaics?
« on: November 06, 2017, 11:25:10 PM »
I would like to know, if someone have experience with this, how to create a good thermal orthomosaic with Agisoft Photoscan, is better use the sparse cloud or the dense cloud? if is the dense cloud, wich mode: aggressive, mild or moderate? and finally with the mesh: height field or arbitrary?

Thanks.

A few months ago, I've been working hard for a good result of a thermal orthomosaic. So these were my best results at the end.

Thermal black and white
https://drive.google.com/open?id=1XQtWdHOnti0Qh3OrJhizMucATOB1RyHj

Thermal color
https://drive.google.com/open?id=13vl9IVYKFxvbHCKiyD9QoifwNtIZllJG

I will also upload the report of this project, so that you can read which settings I did use.

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