  Our sensor system consists of a combination of Photonic Mixer Device - PMD
and Mono optical cameras. Some traffic signs have stripes at 45{deg}. These
traffic signs cancel different restrictions on the road. We detect this class
of signs with Radon transformation. Here the Radon transformation is calculated
using Central Slice Theorem. We approximate the slice of spectrum by the
Discrete Cosine Transformation (DCT).
