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Messages - SuperNewb

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16
General / Re: aligning forest images
« on: August 23, 2016, 05:27:38 AM »
I agree with pap1956,

When I am shooting heavy canopy areas, I increase my overlap by as much as 90% to get photoscan to build.  It is overkill in many situations but it saves me from having to re-mobilize to the scan site again.

17
General / Help with GCP tie-ins after initial survey
« on: August 05, 2016, 05:29:20 PM »
Hello again everyone,

I am working on a survey where some of the GCPs placed on-site had moved just before photos were taken...  I have isolated these erroneous markers and processed the data to not include these GCPs.

However, the resulting DSM is flawed in the areas missing the GCPs as expected and I have been trying to correct this without reflying the site. 

A surveyor has collected a series of points on-site now in areas where no changes to topology have occurred. I want to use these to drive the elevations of the incorrect regions.  My thinking was that I could simply drop these phantom GCP points into my data, go along and tag them to their corresponding photos where photoscan estimates that they should be, and optimize the points. 

It looked as though it was working well, too well in fact, and it is now clear that it did not work at all.  After optimization, Photoscan tells me that there is error in the new points between .2 and 3cm...  but after building a new dense cloud, these points are still stranded in the air and not actually helping to drive the new elevations....  The Resulting DSM is exactly the same as the DSM without these points added.

Any ideas from the gurus out there?

Thanks

18
General / Re: Help creating a .prj file for Local Mine Grid
« on: July 30, 2016, 03:19:21 AM »
Thanks Pap1956,

I was able to get a version up and working yesterday.  However I am uncertain if NAD83 CSRS is the correct datum.

In the info supplied to me, it makes reference to the WGS84 ellipsoid model, so I added that in there rather than Nad83. 

Am I wrong for doing this?  It seems to be working.

Also, I haven't dug into it too hard but do you think I will be able to use the TOWGS84 to apply the coordinate shifts and rotations necessary?

Here is what I am working with right now.

19
General / Help creating a .prj file for Local Mine Grid
« on: July 28, 2016, 01:24:18 AM »
Hi Guys,

I am having a hard time trying to wrap my head around building this .prj file and getting it to work inside PS Pro.

I have a set of images from my client that I assume they screen capped from MineSite.  I have put a word doc together with all the info contained in the images to make this easier.   I am hoping that someone can help me use this information to put together  a working .prj file that photoscan can read.


Much thanks,

Matt

Edit:

I am using Global Mapper to help me sort this out.  It appears however that the .prj files GM creates are not directly compatible with PS.  I have attached 2 UTM NAD83 10N .prj files, one from PS and one from GM.  It looks like the authority tags are the only difference.   What am I missing here, do I need to find Authority tags to let me create a .prj file for PS?


20
General / Re: Building dense cloud for soil surface (bare soil)
« on: January 26, 2016, 11:14:40 PM »
The Phantom 3 and Inspire 1 are not very close to a fisheye lense.  The older phantom 1 and 2 used gopro cameras which were very fish eyed.

There should be no need to calibrate the phantom 3 camera.

-Capture the images in the brightest conditions possible.

-generate sparse point cloud on high or very high setting using Reference mode.
   -clean up points

-generate dense point surface on medium or high setting.  (Ultra high setting does not add much with DJI cameras, just creates unwanted noise.)

Is this what you were looking for or are you talking PC configuration?

21
General / Re: Agisoft PhotoScan 1.2.0 pre-release
« on: November 21, 2015, 01:23:23 AM »
Hi Alexey,

I see that the "Reference Settings" dialogue has changed in the recent updates.  With the new changes, I find myself unable to lower my overall error when optimizing to GCPs.

Normally in my workflow I optimize cameras only first to remove as much scene warping as possible.  Then I uncheck all cameras and optimize to my GCPs using the default 0.005 GCP accuracy.  This always worked nicely for me but now I can not get my error down using the same method...

I also see that there are new boxes in the "optimize" dialogue.  I have played with checking and unchecking different boxes and still can not get my error down.

with my current project, I expected a 5 to 10cm average error but I can not get the error below 18cm now.

Could you explain what all the new options mean in both the "Reference Settings" and "Optimize" Dialogues?

Thanks and keep up the good work.

(Edit)  I took the GCP accuracy down to 0.0005 and after optimizing got my expected error back to normal. 
Also I see the manual has been updated to version 1.2 and covers most of my queries.

22
General / Re: Agisoft PhotoScan 1.2.0 pre-release
« on: November 18, 2015, 12:05:35 AM »
Thanks Alexey,

I used DDU to clean out my old drivers and used the 14.4 version of catalyst drivers for AMD.   It looks like my troubles have all gone away... Woohoo, I thought this was going to be a lot more trouble.

23
General / Re: Agisoft PhotoScan 1.2.0 pre-release
« on: November 17, 2015, 06:01:33 AM »
Hi Alexey,

I am getting this error when building dense point cloud on high setting.

"ocl_engine.cpp Line 231: clEnqueueWriteBuffer failed"

It happens once or twice during a medium quality build but during a build on high it is pretty much constantly switching to use the CPU.

The video card being used is a radeon HD 7990 with latest drivers installed...  Could it be a temperature issue?  what should I be looking for?

Thanks

24
General / Re: Will Photoscan work well with a ram disk?
« on: November 10, 2015, 11:10:51 PM »
i7 can adress only 64 GB ram, for 64+ GB ram need a XEON CPU 
using RAM disk is useles, better buy a SSD as RAM is more important

Thanks Wishgranter,

Another question for you:

For the Xeon, what is more handy? More cores or more hz?

  My current rig is a dual xeon e5-2690,  they are clocked at 2.9ghz and combined have 16 cores.   When i process some jobs against a fast i7, the i7 gets some tasks done far faster.  Should I try a high ghz quad core xeon to best match the i7 or go for another expensive high core cpu?

Thanks

25
General / Re: Area measured
« on: November 10, 2015, 04:55:53 AM »
Hi Vinicius,

Check that the photos taken by your UAV have correct geotags.

What coordinate system are the Geotags recorded in?

Did you convert the coordinates at all within photoscan?

Sometimes I accidentally uncheck some photos before I convert to UTM and it gives very wild results. 

Maybe you simply used the wrong coordinate system altogether.

26
General / Will Photoscan work well with a ram disk?
« on: November 10, 2015, 04:34:01 AM »
Hi guys,

I am building a new PC to pair with my current xeon rig and have a question regarding ram.

I want to go with an i7 for this build and the max ram it supports is 64gb.  Motherboard supports up to 128gb though.

If I build with 128gb of ram, will Photoscan be able to utilize the additional 64gb if I assign it as a ram disk?  Has anyone tried doing something like this before?

I may try this setup and if it does not work out I can swap the i7 for a quick single xeon to get all the ram working.   

Build looks like this right now:


Intel Core i7 – 5820K Processor

Intel Liquid Cooling

MSI X99A Gaming 7 Motherboard

Thermaltake Core X9 ATX Desktop Case

128GB RAM (Crucial 16GB x 8)

 1200W PSU

Intel 480GB 2.5” SSD

Western Digital 4TB Red HDD

MSI R9 390 Gaming 8GB DDR5 GPU




27
General / Re: Agisoft PhotoScan 1.2.0 pre-release
« on: September 28, 2015, 01:18:37 AM »
Hi Alexey,

i have not seen this covered yet so I thought I would ask.

Is there a way to select the mosaic cells that photoscan has generated?  It is very tedious to click out a polygon everytime to assign new image projections. 

I imagine there is a hotkey somewhere for this but I have missed it.

Thanks

28
General / Re: DJI Phantom 3 profesional
« on: September 01, 2015, 01:20:14 PM »
For new DJI products like the phantom 3 and Inspire 1, have a look at Map Pilot http://www.dronesmadeeasy.com/Articles.asp?ID=254  from the guys who offer the MapsMadeEasy service.

The app is in beta stage and should be released in the near future.  I have been lucky enough to be in the beta and the app is pretty rock solid.

If you can not wait for the app to be released you can manually fly in a grid pattern and snap photos manually as well.  All photos taken with the Phantom3 and Inspire 1 are automatically georefferenced via the onboard GPS and ready to be processed inside of Photoscan.

After the "align images" step,  you can add your GCPs to the project if you have them to bring up your accuracy.  Then just continue on to produce a Dense Cloud followed by the mesh/DSM/Orthomosaic.

Alternatively to using Photoscan and processing yourself, you can also use an online service like MapsMadeEasy or DroneDeploy.  I have tested MapsMadeEasy and it produces great results.  I prefer to process locally though for more thorough accuracy and filtering.



29
General / Re: Agisoft PhotoScan 1.2.0 pre-release
« on: August 28, 2015, 11:32:31 PM »
Hello mwillis,

The procedure can be briefly described as follows:
- after building the orthomosaics open it in the Ortho tab by double-clicking on the corresponding line in the Workspace pane,
- choose Draw Polygon instrument on the toolbar,
- draw a polygon,
- select polygon with the left-click then right-click on it and choose Assign Images in the context menu,
- specify the image (or images) to be used for the current fragment,
- repeat previous steps any times you wish on different areas,
- when all the changes have been made press Update Orthomosaic button on the toolbar to apply the changes (it will take some time).
Hello Alexey,
I tried this workflow hoping that roofs will be computed with higher accuracy.
So I marked a roof with the polygon and assigned an image to it where the whole roof is visible.
But the jagged roof edge is still there.
I have attached a screenshot.

Regards,
Mathias

For clean roof lines, I first filter the building out of the dense point cloud before meshing and building orthomosaic.  This method works well for small houses,sheds, and cars to keep their edges clean. 

30
General / Re: Agisoft PhotoScan 1.2.0 pre-release
« on: August 24, 2015, 05:57:46 AM »
Trying to generate an orthophoto in this release is giving me trouble...  In previous versions, after generating a mesh I could export an orthophoto in pieces.  now you must first generate an orthophoto within photoscan and it does not allow to generate it in multiple pieces...  It keeps running out of memory now, and I am quite stuck.

Maybe I am missing something.

I am running 128gb of ram and upon monitoring the usage it looks like it didnt go beyong 50% of Ram usage.

The Chunk is roughly 6800 photos and is quite large but I have tried Chopping the chunk down with no luck...

Also, I have just upgraded to windows 10 which may have been a bad idea as now while processing in photoscan, the computer grinds to a near halt and cannot do much else at the same time.

Any help would be greatly appreciated.

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