LabVIEW base software for spatial frequency domain imaging system

Abstract.

Spatial frequency domain imaging, a novel non-contact optical imaging technology, can quantitatively detect optical properties of agro-products which are connected with chemical components and physical structure of tissue. This study introduced a custom program written in LabVIEW 2014 to simplify the configuration and operation of spatial frequency domain imaging system. The LabVIEW procedure can realize several functions: generating sinusoidal grayscale patterns which were projected onto the surface of phantom through a digital projector, controlling motorized precision translation stage to change the position of sample accurately, triggering the CCD camera to circularly collect images, and doing data processing to extract optical properties of tissue. We detected the absorption coefficient and reduced scattering coefficient of a series of self-made solid phantoms with known optical properties and a Fuji red apple using the system proposed in study. The results of phantoms experiment were compared with that detected by the former procedure which processes data in MATLAB. The detection time is reduced, and few difference in accuracy was obtained which means the new software is practicable in spatial frequency domain imaging system. The result of apple experiment demonstrated this system can realize the correct detection of optical properties of apple.