New DTM extraction now in Pix4D Desktop 3.1

Pix4D is proud to announce the implementation of successful academic research on DTM extraction into Pix4D Desktop from version 3.1.

Precisely distinguishing bare earth from digital surface models (DSMs) has always been sought-after. However, it remains difficult to accurately separate objects from terrain, due to the large variety of vegetation and man-made structures above ground.

DSM to DTM examples

Using DSMs generated from high-resolution images, Pix4D Desktop’s algorithms can now detect bare earth, as well as compute and remove above-ground objects precisely without pulling the terrain height up for interpolation.

This new approach gives the accurate terrain model elevation, instead of just visually removing objects.

This fully-automated algorithm works perfectly on surface models, whether it contains small and scattered houses or large, dense trees.

Here is the sample results from the city of Lausanne data set (GSD=10 cm):

Digital Surface Model of the city of Lausanne
DSM of Lausanne.
Digital Terrain Model of the city of Lausanne
DTM of Lausanne.

Two contrasting contour lines of the same area of Lausanne. The left contour lines are based on DSM and are very detailed. The other contour lines are based on DTM and are less detailed.
Contour lines generated based on DSM (left) and DTM (right)

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To experience the amazing new DTM extraction!

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