the Afga and Ilford films. First, taking into account the dif-
ferent resolutions as a factor between the test results, the
information and quality of the analog images scanned at
the different resolutions are quite similar. The conclusion
is that scanning a film image with 5/m is unnecessary be-
cause the 20;/m scan contains the same information. There
is no more information included in the film and thus can-
not be revealed by scanning at higher resolution. Second,
the digital sensed images are equal to the 20m scanned
film image in the edge response and Siemens star tests, but
outperforms the film images in stereo matching accuracy.
Stereo matching results in a 2.5 times smaller noise level
and it is possible to match also in poorly textured ares be-
cause of the absence of noise.
The conclusion of the work is that digital sensors are lead-
ing to highly accurate and robust photogrammetric pro-
cessing. The next stage is to perform these tests on syn-
chronized exposed aerial images of digital UltraCam p and
analog RMK Top from an airplane holding both cameras
on the same flight.
REFERENCES
Agfa, 2003. Agfa Technical Data - Agfa Professional
Films. Report F-PF-E4, 4th Edition.
Blonski, S., Pagnutti, M., Ryan, R. E. and Zanoni, V.,
2002. In-flight edge response measurements for high-
spatial-resolution remote sensing systems. In: W. L.
Barnes (ed.), Proceedings of SPIE: Earth Observing Sys-
tems VII, Vol. 4814, pp. 317-326.
Farid, H. and Simoncelli, E. P., 1997. Optimally rotation-
equivariant directional derivative kernels. In: Computer
Analysis of Images and Patterns, pp. 207-214.
Gleason, S. S., Hunt, M. A. and Jatko, W. B., 1990. Sub-
pixel measurement of image features based on paraboloid
surface fit. Proc. Machine Vision Systems Integration in
Industry, SPIE, Boston MA.
Haralick, R. M. and Shapiro, L. G., 1992. Computer and
Robot Vision. Vol. 2, Addison-Wesley Publishing Com-
pany.
Harris, C. and Stephens, M., 1988. A combined corner and
edge detector. Proceedings 4th Alvey Visual Conference
pp. 189-192.
International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B3. Istanbul 2004
Hinz, A., Dórstl, C. and Heier, H., 2000. Digital modu-
lar camera: System concept and data processing workflow.
Archives of the Intl. Soc. for photogrammetry and remote
sensing. Amsterdam, The Netherlands.
Ilford, 2002. Ilford 100 Delta Professional. Report No.
95026A.www.
Kodak, 2002. KODAK Technical Data - T-MAX Profes-
sional Films. KODAK Publication No. F-32, CAT 155
8527.
Kodak, 2003. KODAK Technical Data - Professional
Technical Pan Film. KODAK Publication No. P-255, CAT
817 2785.
Kodak, 2004. KODAK Technical Data - T-MAX Profes-
sional Films. KODAK Publication No. F-4016.
Leberl, F., Gruber, M., Ponticelli, M., Bernoegger, S. and
Perko, R., 2003. The UltraCam large format aerial digital
camera system. Proceedings of the American Society for
Photogrammetry & Remote Sensing, Anchorage, Alaska.
Luxen, M. and Fórstner, W., 2002. Characterizing image
quality: Blind estimation of the point spread function from
a single image. ISPRS Commission III: Theory and Algo-
rithms XXXIV(3A), pp. 205—210.
Perko, R. and Gruber, M., 2002. Comparison of qual-
ity and information content of digital and film-based im-
ages. ISPRS Commission lil: Theory and Algorithms
XXXIV(3B), pp. 206—209.
Torr, P. H. S., 2002a. Bayesian model estimation and se-
lection for epipolar geometry and generic manifold fitting.
International Journal of Computer Vision 50(1), pp. 35-61.
Torr, P. H. S., 2002b. A structure and motion toolkit in
matlab: Interactive adventures in s and m. Technical Re-
port MSR-TR-2002-56, Microsoft Research.
Vexcel Imaging Austria, 2002. Ultrascan 5000 - Precision
photogrammetric scanning. VIAOOIPB-1002 rev 0.1.
Zhang, Z., 1997. Determining the epipolar geometry and
its uncertainty: A review. International Journal of Com-
puter Vision 27(2), pp. 161—195.
