Full text: XVIIIth Congress (Part B5)

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he targets 
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ipal point, 
meters for 
tangential 
ned. Next, 
onvergent 
tion of all 
oordinates 
! common 
signalized 
y, on the 
y in image 
space corresponds to 0.5 of the pixel spacing. The 
resulting standard deviations of the points of the 
testfield after bundle adjustment lied in the range of 0.2 
mm which is equivalent to a relative accuracy of 
1:3000 in object space. Considering the applied 
method of pixel coordinates measurement and the 
functional model enhanced in small degree for 
additional parameters, the obtained results can be 
accepted as sufficient. 
5. FINAL REMARKS 
The digital system for close range photogrammetric 
applications presented in this paper is in testing phase 
now. The test comprise optimisation of conditions of 
digital images sequences performing, studies of effects 
of certain filtering methods and contrast correction on 
measurement accuracy in the pixel coordinate system. 
In current form, the system can be used for off-line 3D 
data acquisition in the process of monitoring of non- 
topographic objects in close range ,in such cases when 
immediate extraction of information on the studied 
object is not needed. The current architecture of the 
system, i.e. its first stage of development, limits the 
speed and accuracy of digital processing. The first, 
experimental tests gave sufficient results of three 
dimensional points determination, especially when the 
simplified procedure of elaboration is regarded. 
In the nearest future, the system will be developed in 
the following directions : 
e to apply automatic procedures of structural object 
recognition on images, and automatic measurement 
of pixel coordinates, 
e to enhance the functional model of bundle method 
with further, additional system calibration 
parameters. 
On the basis of gained experience, we perform 
construction of video-thermal system (multi-media- 
sensor system) within independent research project. In 
this system, a new generation frame grabber board will 
be coupled with AGEMA-880 infrared camera together 
with CCD  multicameras photogrammetric digital 
System. Video-thermal system, in which all the sensors 
will work parallel will designated for multi-purpose 
industrial monitoring. 
6. REFERENCE 
Baltsavias, E.P. et al. 1990. Fundamentals of Real-Time 
Photogrammetry. ISPRS ETH Zurich. Close Range 
photogrammetry Meets Machine Vision SPIE Vol.1395. 
Symposium Zurich 1990. 
Beyer, H.A., 1987. Some Aspecs of the Geometric 
Calibration of CCD -Camerac. Proceedings of the 
Intercommission Conference on Fast Proccesing of 
Photogrammetric Data, Interlaken, Schwizerland, pp. 
68-81. 
Beyer, H.A., 1988. Linejitter and Geometric Calibration 
of CCD-Cameras. International Archives of 
517 
Photogrammetry and Remote Sensing, Kyoto, Japan, 
Vol. XXVII, Part B10, pp. 315-324. 
Beyer, H.A., 1992. Geometric and  Radiometric 
Analysis of a CCD-Camera Based Photogrammetric 
Close-Range System. Dissertation Nr. 9701, Institut 
fuer Geodaesie und Photogrammetrie, ETH- 
Hoenggerberg, Zuerich. 
George, A., Liu, J., 1981.Computer Solution of Large 
Sparse Positive Definite Systems. Prentice-Hall 
Englewood Cliffs, New Jersey 
Gruen, A., 1988. Towards Real-Time Photogrammetry. 
Photogrametria., 42(1988), pp. 209-243. 
Gustafson, P.C., 1988a. The Application of Real-Time 
and Near Real-Time Photogrammetry in Industry: A 
Test of Accuracy. International Archives of 
Photogrammetry and Remote Sensing, Kyoto, Japan, 
Vol. XXVII, Part B10, pp. 198-205. 
Gustafson, P.C., Handley, H.B., 1992b. Video-Based 
Industrial Measurement System. International Archives 
of Photogrammetry and Remote Sensing, Washington, 
USA, Vol. XXIX, Part B5, pp. 501-506. 
Heipke, C., 1992. Photogrammetric Calibration and 
Point Determination Using a Dogital CCD Camera. 
International Archives of Photogrammetry and Remote 
Sensing, Washington, USA, Vol. XXIX, Part B5, pp. 
556-560. 
Lenz, R., 1989. Image Data Acquisition with CCD 
Cameras.Optical 3D Measurement Techniques. Vienna / 
Austria, pp. 22-34. 
Lenz, R., Fritsch, D., 1990. Accuracy of videometry 
with CCD sensors. ISPRS Journalof Photogrammetry 
and Remote Sensing, 45(1990), pp. 90-110. 
Luhman, T. 1991. Aufnahmesysteme fuer die 
Nahbereichsphotogrammetrie. Zeitschrift f. 
Photogrammetrie und Fernerkundung 59(3), pp. 80-87. 
Wester-Ebbinghaus, W., 1983.  Einzelstandpunkt- 
Selbstkalibrierung - ein Beitrag zur Feldkalibrierung von 
Aufnahmekammern. Deutsche Geodeatische 
Kommission Reihe C, Heft Nr. 289. 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B5. Vienna 1996 
 
	        
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