Determining multispectral or hyperspectral image data

Abstract

This disclosure concerns the determination of electronic multispectral or hyperspectral images, such as by a processor in a camera. The processor receives first image sensor signals that are associated with a first wavelength and with multiple first imaging elements at respective first imaging element locations. The processor determines a spline approximation to the first image sensor signals across the first imaging element locations and determines the multispectral or hyperspectral image data by interpolating the spline approximation at the pixel location. Finally, the image data is stored on a data store. Using splines to interpolate the image sensor signals outperforms other methods, which means increased image quality due to more accurate interpolation. More specifically, using splines leads to a more accurate spectrum at each point and reduced spectral error compared to other methods.