Piste)
(c) Serna regions(L)
(d) Segmented egions (R)
eA e ==> À M ut A
A MEN Y
i = Crd s 7)
Rem a rs à m TL)
Tar Pl Le :
Co ei Fines. ea
A
HO Ca M =
WR DR RES
— R3 IU A «a ca & -
€ em £s ize d
Um vA ura V bes.
m Qu ; zs e
_— a
(g) 3D regions above (h) 3D regions above (1) House extracted from (j) House extracted from
the ground (L) the ground (R)
region-lines pairs(L) region-lines pairs(R)
(k) 3D lines above the ground(L) (1) 3D lines above the ground(R) (m) A map data
Fig.4. Experimental results of house extraction(L--left, R--right). (a) and (b) are the original images involving a lot of
buildings, roads, and a few trees as well as cars. (c) and (d) present the totally segmented regions from the left and right
images, respectively. (e) and (f) show the 3D lines which lie on the ground surface. (g) and (h) illustrate the house
hypotheses extracted from 3D regions, i.e., these 3D regions which lie above the ground. (i) and (j) show the house
hypotheses extracted from region-lines pairs which are located above the ground. (k) and (1) are the 3D lines above the
ground. (m) is the map data at the experimental area in which two houses with X sign were unable to be detected in this
experiment.
785
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B4. Vienna 1996