Messages

1

Bug Reports / "APPCRASH" Error When Trying to Open PhotoScan

« on: November 05, 2013, 11:38:27 PM »

Hi,
I have been having an issue on some computers where Agisoft PhotoScan crashes while it's trying to start. Currently I have Agisoft on three computers (two with version 0.9.1 build 1714 and one with version 0.8.4 build 1289).
When trying to install version 0.9.1 (upgrading from 0.8.4), everything works fine on the installation but the program crashes when you try to start it up. If I try to go back to the previous version or try to install version 1.0.0, Agisoft crashes with the same error. All of the computers that are encountering this issue are Windows 7 64-bit and are up to date.

Here is the appcrash report that is generated:

Problem Event Name:   APPCRASH
  Application Name:   photoscan.exe
  Application Version:   1.0.0.1
  Application Timestamp:   524c5ced
  Fault Module Name:   MSVCR100.dll
  Fault Module Version:   10.0.40219.325
  Fault Module Timestamp:   4df2bcac
  Exception Code:   40000015
  Exception Offset:   00000000000761c9
  OS Version:   6.1.7601.2.1.0.256.48
  Locale ID:   1033
  Additional Information 1:   b2ed
  Additional Information 2:   b2ed4333ee41531504b8a0b164a28e50
  Additional Information 3:   c3e6
  Additional Information 4:   c3e6d57474d73037e91fc5d8ede4dddf

Thanks

2

General / Re: Problems Making 3D Model From Video Frames

« on: August 31, 2013, 07:11:34 PM »

Hi 7eicher,

For taking video I was using a RED Epic while I used the D800 to capture full frame pictures at 4 fps. The video resolution on the D800 is only 2 MP per frame which is too little for what I want to do. The RED Epic is capable of 5K video which is 13.8 MP per frame but its also significantly more expensive. I have used VLC to extract frames from video captured from GoPros but the RED Epic requires Adobe Premiere.

The problem of motion blur can be solved by adjusting the shutter speed. Faster shutter speeds will "stop" the motion across the sensor. To do this you'll have to test and adjust your camera for your setup (shutter speed, aperture and ISO), the object you are shooting at and the amount of light. Higher frame rates will only allow for more overlap of the frames.

3

General / Re: Problems Making 3D Model From Video Frames

« on: August 29, 2013, 09:41:18 PM »

Hi everyone,

So after a fare amount of testing with more imagery at various resolutions and overlap, I think I have found the root of the problem. In an earlier post I have mentioned using a 12.3 MP Nikon D5000 camera to make models and everything worked fine a couple of years ago. The extracted video frames I used have the same overlap and are 13.8 MP but I was not having any success.

So I went back to the original imagery that I took two years ago and ran it through PhotoScan Pro 0.9.1 and I was not able to make a 3D model... In fact I was seeing the same issues as with the video frames. I then loaded the older version (0.8.4 build 1289) that I used two years ago on another computer. I then ran the same set of photos from the D5000 through each version. The older version produced a 3D model while the newer version didn't. I have attached screenshots of the results. What's even more interesting is that I was able to generate an accurate model when running the extracted video frames though the older version of Agisoft.

Was something changed in the way models are constructed between the these two versions?

Thanks

4

General / Re: Problems Making 3D Model From Video Frames

« on: July 19, 2013, 10:58:32 PM »

That is pretty neat. I use Lexar Professional 1000x compact flash cards in my D800. They have a write speed of 145 MB/sec. It would be interesting to see what the Exceria Pro cards could do for me in my other cameras.

Any additional thoughts on the video frame issue? I just find it interesting that the D5000 with 12.3 MP works and the video at 13.8 MP per frame does not.

Also I don't have access to the RED Epic for the little while so I wont be able to try a high frame rate or the multiple flight line suggestions at this time.

5

General / Re: Problems Making 3D Model From Video Frames

« on: July 19, 2013, 09:45:13 PM »

That's interesting... I have made reconstructions of the same location with a 12.3 MP Nikon D5000. I have attached an example point cloud from D5000 photos of the same location and photo overlap as the 5K video frames that I attached previously. The photos from the D5000 are aligned properly and the 5K video frames are not...

The reason I am pursuing the video route now and not just continuing to use the D5000 which has always worked for me is that I need to have a higher frame rate. I have a Nikon D800 that will give me 4 frames/sec but for what I'm doing I need at least 20 frames/sec.

I have also posted example frames from the 4K, 5K and D5000 collect to our ftp for you to try.

ftp://ftp.mtri.org/pub/Agisoft/

Thanks for your help!

6

General / Re: Problems Making 3D Model From Video Frames

« on: July 17, 2013, 10:04:25 PM »

Hi Wishgranter,

The project that I showed in my first post had a little more than 60% overlap. So a feature on the ground would be represented in at least two frames. I have attached another example with increased overlap where a feature on the ground is represented in least four frames. I still have the same problem.

7

General / Problems Making 3D Model From Video Frames

« on: July 17, 2013, 07:06:04 PM »

I am trying to make 3D models from extracted video frames. I am not shooting HD video but rather taking 4K (8.8 MP) and 5K (13.8 MP) video. I am reconstructing a relatively flat surface and after aligning the photos the point cloud shows a distinctive arch that is not accurate (see attached).

I have made 3D models of this surface before using several different Nikon DSLRs with recent versions of Agisoft without a problem. I have tried to edit the EXIF data by adding the focal length in (since it is not the 50mm default) and tried changing the Fx and Fy in the camera calibration. I have also tried constructing small chunks as well as the full data set of 80 frames and both versions Agisoft Photoscan Pro 0.9 and 0.9.1 but the same problem persists.

Any thoughts?

8

Bug Reports / Out of memory error.

« on: October 13, 2011, 06:47:34 PM »

I keep getting an "out of Memory" error when I try to build the geometry of for projects involving more than about 60 photos or so. I have tried lowering the quality to medium but I receive the same error.

I am running the latest version of AgiSoft Photoscan Pro ( 0.8.3 Build 1224) on Windows 7 64-bit computer.

I have 96GB of ram installed on the computer but when I get the error, no more than about 10GB are being used.

Thanks,

Rick