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International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B5. Istanbul 2004
Sheet 3-1 Calculation results
Test scheme 1# building 3# building
Station number 55 30
Photography scale 1: 1000 1: 1000
Photography mode Normal Convergence
photography photography
Object coordinate
means of error (mm)
X 0.52 0.47
y 0.54 0.45
Z 0.53 0. 48
P 0.53 0.46
Relative means of error | 10000 12000
Model connection error | <10 <8
(pixel)
Means of reliability 0.63 0.65
Note: Distance and self calibration parameters added into
adjustment system
4.2 Conclusion
a.Building free network based on the first model of independent
coordinate system, the stance of first model affect sequence
processing, normal photography is a better ways.
b. Connection of free network consist of individual models, the
error is transmitted inevitability. Systemic error rectification
and relative control condition carried out can intensify the
intensity of photogrammetry network..
c. Free network take centriod as reference coordinate system,
known directions and coordinates under corresponding
coordinate system can easy to transfer to other coordinate
system.
d. Finite iterative algorithm used to solve spatial coordinates of
model.
e. Comparing with classic bundle adjustment, advantages of
free network bundle are: coordinate estimate values and precise
are not affected by accuracy of starting point, the errors are
even equality and small.
REFERENCE:
[1] Feng wenhao. Close-range photogrammetry, wuhan
university press, China,2002
[2] Zhang zhuxun, zhang jianqing. Digital Photogrammetry,
wuhan university press, China,1996
[3] Ma songde, zhang zhengyou. Computer Vision. Science
press, China, 1998
[4]Robert T. Collins. The Ascender System: Automate Site
Modeling from Multiple Aerial Images. Computer Vision And
Image Understanding, 1998, Vol.72
[5] Tanimoto S, Pavilidis T. Hierarchical Data Structure for
Picture Processing. Computer Graphics and Image Process,
4:104-119
[6] Shao xihui. Military Engineer Photogrammetry, PLA press,
China, 1991
[7] Tao benzao. Free Network Adjustment and Distort Analysis.
Mapping and Surveying Press, China.1984
[8] Huang weibin. Recent Adjustment Theory and Application.
PLA Press, China,1992
[9] Jia shengju. Study on Three-Dimension Modelling of Close-
range Objects. Tongji University, Doctoral Thesis, 2003.4