III 
CONTENTS 
COMMISSION I 
MEETING ON WEDNESDAY, 7TH SEPTEMBER 
General Introduction by the President of Commission I 
Invited paper: 
G. C. Brock, The Quality of the Photographic Image . 
Author's presentation of the paper 
Discussion ; 
FIRST MEETING ON THURSDAY, 8TH SEPTEMBER 
Introduction by the Chairman, Mr J. Cruset . M D ee ei A 
Presentation of papers by Prof Schwidefsky and Dr Meier; continuation of 
the discussion on Mr Brock's paper 
Related presented papers: 
E. Welander, Contrast Transfer Functions in Aerial Photography . 
K. Schwidefsky, Über die bei Luftaufnahmen wirksame Beleuchtung 
K. Schwidefsky, Kontrastübertragungs-Funktionen zur Bewertung der 
Bildsüte in der Photogrammetrie . —— — 9 . i Pals Jenin 
H. K. Meier, Diskussion der Bewegungsunschárfe bei Luftbildern mit 
Hilfe einer Kontrastübertragungsfunktion . : : ; ; : : 
S. A. Hempenius, Dodging, a Non-Linear Element in the Contrast 
Transfer of the Photographic System . : : ; ; ; 
K. B. Jackson, Factors Affecting the Interpretability of Air Photos 
SECOND MEETING ON THURSDAY, 8TH SEPTEMBER 
Invited paper: 
R. David, Über einige geometrische Eigenschaften des Bildes und die 
Elemente der inneren Orientierung von photogrammetrischen Kameras 
Author's presentation of the paper 
Discussion 
Related presented papers: 
B. Hallert, Results of Practical Investigations into the Accuracy of 
Aerial and Terrestrial Photograplis. |... 6 SE t + 
P. Tham, Vertical Parallaxes, Lens Distortion and Stereoscopical Model 
P. D. Carman, Recommended Procedures for Calibrating Photogram- 
metric Cameras and for Related Optical Tests 
J. A. Eden, Camera Calibration Constants . : : : ; 
J. A. Eden, The Need for an International Test House for Air Films 
F. L. Corten, Testing in Aerial Photography UHR» 
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