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Topics - mwillis

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Feature Requests / Write Camera Locations to EXIF
« on: May 27, 2012, 05:41:09 PM »
It would be very useful on some projects to be able to write the camera orientation (exterior orientation) data to each images EXIF header.  This would be great in the following workflow:
  • Place ground control (actual markers on the ground)
  • Conduct aerial photography withOUT an onboard IMU (like with a kite)
  • Process the data in PhotoScan to determine camera locations
  • Write camera locations to EXIF
  • Start a new PhotoScan project and import photos but use new EXIF data for camera locations

Why would one do this?  I’ve found in some projects with multiple chunks when using Differentially-corrected GPS data collected at ground marker that some errors still exist.  These errors can cause slight might alignments of the chunks.  If EXIF data is used to generally align things, these misalignments seem to be go away or are reduced.

I’ve tested writing to the EXIF data with external programs and this process works.



General / Use Lens Calibration with Photoscan Pro?
« on: May 17, 2012, 03:38:26 PM »
Hi, I am taking photographs of nearly flat petroglyph panels using a Canon 50D and an 18mm lens.  Do you recommend using Agisoft’s Lens calibration tool in conjunction with PhotoScan?  Perhaps PhotoScan is calibrating on the fly during optimization and external calibration is not needed?



General / How much RAM can Photoscan use?
« on: March 14, 2012, 01:57:04 PM »
I'm interested in building up a computer to use solely for Photoscan Pro.  What are the upper limits of Photoscan Pro in terms of memory and GPU use?  Can the program support 64 gigs of ram and multiple GPU's?


Camera Calibration / Distortion Coefficients
« on: September 13, 2011, 05:02:15 PM »
Hi, can anyone tell me if the K1, K2, P1, and P2 coefficients are expressed in pixels, microns, or mm? 

I am trying to convert from a known camera calibration to Agisoft's format.

Thank you,


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