|t.
Ee
o
[iieri -ImISIVI
[erem ET
n in [76]. Overall
Build.: building;
'ctness.
s V M Lesen AN oh, ne itd un NRF BEART»
IE EIRE ES EI
0
43
02
—
—
re given in [%].
integrating more
res related to car
i-scale features.
ticated model of
Cumar & Hebert,
the association
Finally, we will
| by using image
ence Foundation
(DFG) under grants HE 1822/25-1 and HI 1289/1-1. The
Vaihingen data set was provided by the German Society for
Photogrammetry, Remote Sensing and Geoinformation (DGPF)
(Cramer, 2010):
http://Www.ifp.uni-stuttgart.de/dgpf/DKEP-Allg.html.
Class : d n 2 2, à
= = = = = $ m = E
Ref. eila&ailajlsiailslalsale
Asph. | 25.14 | 1.31 | 1.76 | 0.48 | 0.01 | 0.53 | 0.44 | 0.04 184.62
Build. 1.80 [13.14] 0.48 | 0.08 - 0.16 | 0.24 | 0.13 | 81.93
Grass 1.54 | 0.63 | 14.65 | 1.21 | 0.41 | 4.65 | 0.09 | — [6321
Agr. 0.98 0.31 | 0.75 | 7.32 = 3.231.003 == 158.02
Beach 0.10 - - - 10.00] -- = - ES
Tree 0.31 012 | 257 ]-0.18 — |1428| 0.01 — 181.73
Car 0.26 0.02 | 0.03 | 0.01 - 0.01 | 0.31 - 147.94
Bridge 0.14 | 0.06 [ -- - - - 10.02 7000| —
Corr. 83.02 |84.24 | 72.37 | 78.94 | -- |62.48 127.22 | —
Table 3: Confusion matrix for the experiment using 8 classes
and the car confidence feature. All values are given in
[%]. Overall accuracy: 74.84%. Asph: asphalt.
Class à = : ; = ; : $ :
Ref. za ZZ Al ES
Asph. 24.63 | 1.28 | 1.60 | 0.72 | 0.01 | 0.56 | 0.88 | 0.03 | 82.90
Build. 1.53 [13.26] 0.44 | 0.11 -- 0.16 | 0.40 | 0.13 | 82.70
Grass 1.30 | 0.62 | 14.21 | 1.60 | 0.41 | 4.87 | 0.17 - 161.30
Agr. 0.96 | 0.27 | 0.68 | 7.38 3.25 | 0.07 - 158.53
Beach 0.10 - - -- 0.00 - m I m
Tree 0:10 | 0.12 2.36 | 0.27 - [1458] 0.02 - 183.48
Car 0.25 | 0.02 | 0.03 | 0.02 -- 0.01 | 0.32 -—- | 49.33
Bridge | 0.12 | 007| - | - | - | - | 003 |000| -
Corr. 84.95 | 84.79 | 73.49 | 72.99 | -- |62.24]|17.001| -
Table 4: Confusion matrix for the experiment using 8 classes
without car confidence feature. All values are given in
[%]. Overall accuracy: 74.39%. Asph: asphalt.
au
Figure 2: Classification results. Left: original orthophoto;
centre: ground truth superimposed to the intensity
mage; right: results achieved with 14 classes and the
car feature superimposed to the intensity image.
REFERENCES
Barsi, A., Heipke, C., 2003. Artificial neural networks fort the
detection of road junctions in aerial images. In: /APRSIS
XXXIV (3/W8), pp. 18-21.
Birchfield, S., Tomasi, C., 1998. A pixel dissimilarity measure
that is insensitive to image sampling. JEEE-TPAMI 20(4), pp.
401-406.
Cramer, M., 2010. The DGPF test on digital aerial camera
evaluation — overview and test design. Photogrammetrie—
Fernerkundung-Geoinformation 2(2010):73-82.
Dalal, N. and Triggs, B., 2005. Histograms of Oriented
Gradients for Human Detection. Proc. of IEEE Conference
Computer Vision and Pattern Recognition: 886-893.
Friedman, J., Hastie, T., Tibshirani, R., 2000. Additive logistic
regression: A statistical view of boosting. Ann. Stat. 28(2):337—
407.
Geman, G. and Geman, D., 1984. Stochastic relaxation, Gibbs
distribution and Bayesian restoration of images. JEEE Trans. on
Pattern Analysis and Machine Intelligence, 6(6): 721-741.
Hinz, S., Bamler, R., Stilla, U., 2006. Theme issue: Airborne
and spaceborne traffic monitoring. ISPRS J. Photogramm.
Remote Sens. 61(3/4).
Hirschmiiller, H., 2008. Stereo processing by semiglobal
matching and mutual information. /EEE TPAMI 30(2):328-341.
Kumar, S. and Hebert, M., 2006. Discriminative Random
Fields. Int’l. J. Computer Vision, 68(2): 179-201.
Kurz, F., Rosenbaum, D., Leitloff, J., Meynberg, O., Reinartz,
P., 2011. In: Proceedings of International Conference on
SMPR 2011 (on CD-ROM).
Leitloff, J., Hinz, S., Stilla, U., 2010. Vehicle extraction from
very high resolution satellite images of city areas. [EEE Trans.
on Geoscience and Remote Sensing, 48(7): 2795-2806
Li, S. Z., 2009. Markov Random Field modeling in image
analysis. 3" ed., Springer, London, 357 p.
Lienhart, R., Kuranov, A., Pisarevsky, V., 2003. Empirical
analysis of detection cascades of boosted classifiers for rapid
object detection. Pattern Recognition, vol. 2781, pp. 297-304
Mayer, H., Hinz, S., Bacher, U., and Baltsavias, E., 2006. A test
of automatic road extraction approaches. In: JAPRSIS XXXVI-
3, pp. 209-214.
OpenCV, 2012.
http://opencv.itseez.com/modules/calib3d/doc/calib3d.html
Ravanbakhsh, M.; Heipke, C.; Pakzad, K., 2008a. Road
junction extraction. from high resolution aerial imagery.
Photogrammetric Record 23 (124):405-423.
Ravanbakhsh, M.; Pakzad, K.; Heipke, C., 2008b. Automatic
extraction of traffic islands from aerial images. Photo-
grammetrie—Fernerkundung-Geoinformation 5(2008):375-384.
Rutzinger, M., Rottensteiner, F. Pfeifer, N., 2009. A
comparison of evaluation techniques for building extraction
from airborne laser scanning. IEEE Journal of Selected Topics
in Applied Earth Observations and Remote Sensing 2(1):11-20.
Stilla, U., Michaelsen, E., Sórgel, U., Hinz, S., Ender, J., 2004.
Airborne monitoring of vehicle activity in urban areas. ZAPRSIS
XXXV- B3, pp. 973—979.
Tieu, K., Viola, P., 2004. Boosting image retrieval. Int. J.
Comput. Vis., vol. 56, no.1-2, pp. 17-36
Viola, P., Jones, M. J., 2004. Robust real-time face detection.
Int. J. Comput. Vis., vol. 57, no. 2, pp. 137-154
Vishwanathan, S., Schraudolph, N. N., Schmidt, M. W.,
Murphy, K. P., 2006. Accelerated training of conditional
random fields with stochastic gradient methods. 23" Int. Conf.
on Machine Learning: 969-976.