area. This paper presents a near-infrared LED-based sensor system for robust material
classification and ranging up to a distance of 1,000mm. … After correcting our 16 sensor
values (4 wavebands × 4 photodiodes), the four values for each waveband are merged into
a single value, which represents the spectral signature used to classify material. For this
purpose, we map the spectral signature and the estimated distance to one of the …