A novel 3D multispectral vision system based on filter wheel cameras

The combination of the multispectral imaging and the 3D imaging in one system would render possible varieties of applications in different fields. In this work a method is proposed for the registration of multispectral data and 3D point cloud, in which the number of spectral bands is increased by combining different multispectral images through 3D information. Based on this method, a 3D multispectral imaging system consisting of two filter wheel cameras and a digital projector is developed. This system can provide maximally 23 spectral bands with a short acquisition duration of ca. 1.5 seconds and achieve a data fusion accuracy of 15 μm for a measurement field of 128 mm × 145 mm. Furthermore, there exists a significant potential to extend the spectral range and raise the spectral resolution by integrating additional cameras with the proposed data fusion principle.