International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B-YF. Istanbul 2004
Table 4. Interior orientation parameters
Calibration result
focal length f. 7.1789
principal point xp 1011.288
principal point yo 773.176
scale factor a; 289.564
scale factor a, 0.078
scale factor a; 0
scale factor ay 289.811
lens distortion parameter Æ; 2.859 x 10?
4. PERFORMANCE EVALUATION
Performance evaluation is performed using RMSE for 8 check
points. Result! shows the RMSE by the proposed calibration
method, and Result2 shows the RMSE by resection method
using 9 GCP. Figure 6 shows horizontal error for check points.
It can be seen that horizontal accuracy is lower 5 times, and
vertical accuracy is lower 2 times compare with the result of
resection method with 9 GCP, but it can be expected that
convenient digital photogrammetry using digital camera is
achived by the proposed method because of this method doesn't
need any GCP measurement on an object field nor previous
interior orientation procedures.
Table 5. Accuracy
T (mm) 2 .(mm)
Result 12.013 13.702
Result2 2.559 7.652
152
5, CONCLUSION AND FUTURE WORKS
Calibration method for convenient digital photogrammetry
using triplet images which were taken by amateur digital
cameras were investigated, and performance evaluation were
performed in this paper. Accuracy by the proposed calibration
method does not reach the accuracy which are calculated by
resection method using 9 GCP.
It may be concluded that influences of lens distortion still
remain, but it is concluded that low-priced, convenient digital
photogrammetry using digital camera is achieved by the
proposed method because of this method doesn't need any GCP
measurement on an object field nor previous interior orientation
procedures.
However, improvement of accuracy and efficient successive
orientation for more two models are still further works.
Reference
Kunii Y., Chikatsu H, 2001, On the Application of 3 Million
Consumer Pixel Camera to Digital Photogrammetry,
Videometrics and Optical Methods for 3D Sharpe Measurement,
Proceeding of SPIE, Vol. 4309, pp.278-287, San Jose.
Chikatsu H., Kunii Y, 2002, Performance Evaluation of Recent
High Resolution Amateur Cameras and Application to
Modeling of Historical structure, International Archives of
Photogramemetry and Remote Sensing, vol.XXXIV, Part5,
pp.337-341, Corfu.
Nakada R., Chikatsu H, 2003, Generating 3D model of
"Meguro Residence" using Digital Armature Camera,
International Archives of Photogrammetry and Remote Sensing
(CD-Rom), Vol.XXXIV-5/W10, ISSN 1682-1777, Vulpera.
] ]
0 50
Figure 6. Error distribution
100mm
