magnified distortion of the structure, and they may be presented in simple 
straightness diagrams or in three dimensional (isometric) sketches. 
CONDUCTOR FRAME NR : 1 
OBE 
© e 9 
go 
HOG 
View of a jacket. Frames in deck level O drawn 
Measured decks are dotted. with deviations as vectors 
(two dimensional view). 
   
Fig.3 Example of graphic presentation 
CONCLUTIONS 
Photogrammetry is well suited for use in the shipyard industry. However, 
even with further integration, use of the method will still be restricted 
to control activities without strong limitations in time consumption. 
The speed of the process may be improved by additional automation of the com- 
putations, especially by automated error detection. But a further reduction 
of the time spent for film and picture digitizing is difficult to achieve 
with traditional methods. The speed of this process might be increased by 
applying digital image processing. The photographing should then be done 
with digital cameras, and point co-ordinates obtained with the aid of image 
processing. Unfortunately, the needed accuracy seems not yet to be safis- 
fied by available digital cameras. 
REFERENCES 
N.N., 1976 Mále- og kontrollrutiner for skipsbygging. 
Sluttrapport, Division of Marine System Design, 
Norwegian Institute of Technology, 178 pages. 
Granshaw, S.I., 1980 Bundle adjustment methods in Engineering Photogrammetry 
Photogrammetric Record, 10 (56):181-207. 
Kenefick, J.F., 1976 Photogrammetry in Shipbuilding 
The National Shipbuilding Research Program, 34 pages 
Kenefick, J.F., 1979 Photogrammetry in Shipbuilding: 
Measuring a Complex Casting 
The National Shipbuilding Research Program, 11 pages 
209