LED Based Multispectral Film Scanner for Accurate Color Imaging

LED (Light Emitting Diode) based spectral imaging is advantageous for its fast computer controlled switching ability, availability of many different types of LEDs and cost effectiveness. It has been used in some applications like biometrics and arts, however, it has not been explored in film scanning. Here in this paper, we have proposed a LED based spectral film scanner that allows acquiring spectral data and at the same time producing more accurate digital color images. Such a system, in practice, is constrained by the limit in the number of LEDs to be used. We have studied the performance of the system also, under the influence of the number of LEDs. Simulation experiments show that the system is capable of acquiring accurate color images with a fairly reasonable number of LEDs. We have also investigated the influence of noise on the number of LEDs, and it shows that the noise plays some part on the number of LEDs to be used.