Detailled building reconstruction results: AREA 2 (Vaihingen)


Name S. Gilani et al. (PCA)
Affiliation Monash University, Australia
Abbreviation MON5

Quality measures in detail: completeness, correctness, quality

Geometric quality: Histograms

Assessment through comparison of DSM


DSM created from reconstruction result (left), and difference to reference (right)
Used color coding for differences: < -1.27m > 1.27m

Visualisation of quality:

Evaluation on a per-pixel level
Legend

true positive pixels

false negative pixels

false positive pixels

Evaluation on a per roof-plane level from the point of view of the reference data
Legend

Pixels available in both the reconstruction results and the reference and belonging to
a reference plane found to have sufficient overlap with planes in the roof reconstruction
results.

Pixels that belong to a reference plane found to have sufficient overlap with planes
in the roof reconstruction results but that are not inside a building in the reconstruction
results (because the extent of the corresponding planes in the reconstruction is smaller)

Pixels in reference roof planes not having sufficient overlap with detected roof planes and not being inside a building in the reconstruction results

Pixels in reference roof planes not having sufficient overlap with detected roof planes, but being inside a building in the reconstruction results

Evaluation on a per roof-plane level from the point of view of the reconstruction result
Legend

Pixels available in both the reconstruction results and the reference and belonging to a detected roof plane found to have sufficient overlap with planes in the reference

Pixels that belong to a detected roof plane found to have sufficient overlap with planes in the reference but that are not inside a building in the reference (because the extent of the detected roof plane is somewhat larger than the extent of the reference roof plane)

Pixels in detected roof planes not having sufficient overlap with roof planes in the
reference and not being inside a building in the reference

Pixels in detected roof planes not having sufficient overlap with reference planes,
but being inside a building in the reference

Topology: Assessment of the topological differences between the two data sets from the point of view of the reference data
Legend

Pixels inside reference planes having a 1:1 relation to planes in the extraction results

Pixels inside reference planes that have no corresponding plane in the extraction results

Pixels in reference roof planes that are merged with other planes in the reconstruction results (1:N relation)

Pixels in reference roof planes split into to two or more planes in the reconstruction results (M:1 relation)

Pixels in roof planes being part of a plane cluster having M:N relations between planes in the reference and planes in the reconstruction results

Topology: Assessment of the topological differences between the two data sets from the point of view of the detected roof plane data
Legend

Pixels inside reconstructed planes having a 1:1 relation to planes in the reference

Pixels inside reconstructed planes that have no corresponding plane in the reference

Pixels in reconstructed roof planes that correspond to several planes of the reference (1:N relation)

Pixels in reconstructed roof planes that are the result of a split of a plane in the reconstruction results (M:1 relation)

Pixels in reconstructed roof planes being part of a plane cluster having M:N relations between planes in the reconstruction results and planes in the reference