Detailled building reconstruction results: AREA 3 (Vaihingen)

Name	P. Dorninger
Affiliation	Vermessung Schmid, Klosterneuburg, Austria
Abbreviation	VSK

Quality measures in detail: completeness, correctness, quality

Per object, as function of object area

Per object, as function of object area, cumulative

Geometric quality: Histograms

Histogram of RMS along extracted boundaries

Histogram of RMS along reference boundaries

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