Topics

1

General / The accuracy of inner and outer camera orientation parameters

« on: February 04, 2015, 05:52:37 PM »

Dear Photoscan-ers,

We did a fensy model out of UAV imagery (3 cm GSD -> 3 GB orthophoto  ). Thanks Agisoft!
However, one thing we miss ..

Our customer would like to know what is the accuracy of inner and outer camera orientation parameters (or intrinsic and extrinsic orientation parameters).
I exported cameras in PS xml format (thanks James for describtion of the file format http://www.agisoft.com/forum/index.php?topic=2570.0]), then camera exterior parameters in BINGO format .. but no accuracy info here 

How/where can I finde those in Photoscan?

Thanks for the answer in advance!

bw, Maja

2

General / The size of coded markers for UAV acquisition

« on: August 26, 2014, 07:50:44 PM »

Dear all,

We are planing an UAV acquisition at a height approx. 75 m & the GSD = 2 cm. The question is, how big should be the coded marker (printable from PhotoScan) to be automatically recognised and coordinates precisely computed?

It is stated in the Tutorial (Intermediate level):Coded Targets & Scale Bars in Agisoft PhotoScan Pro 1.0.0 that the "central black circle-point on the taken photo is not greater than 30 pix." What would be the minimum requirement (the min no.pixels that the target is recognised)?

There was a discussion in 2012 (Automatic GCP identification), when a right/better marker was searched for .. to be used for mid&far range photogrammetry. Any solutions, we could use now?

Many thanks for any info & advice.

bw, Maja

___________________________________
Maja Bitenc, MSc
University Assistant

Graz University of Technology
Institute of Applied Geosciences
Rechbauerstrasse 12, 8010 Graz, AUSTRIA
Email: bitenc@tugraz.at
Web: www.egam.tugraz.at