A Compact Multispectral Imaging System for Online Poultry Contaminant Inspection

Abstract

The final goal of this research was to design and fabricate a compact, cost effective multispectral instrument for real-time contaminant detection at poultry processing plants. The prototype system developed in this research was a dual-band spectral imaging system that acquired two different spectral images simultaneously. It was a two-port imaging system that consisted of two identical monochrome cameras, optical system and two interchangeable optical filters. A spectral reflectance from an object was collimated by lenses and split identically in two directions by a beamsplitter, and then each light was focused on the sensor by lenses through an optical filter. Two optical filters, that determined the spectral characteristic of the imaging system, were interchangeable without complicated manufacturing process. To create an accurately registered two-band image, an image calibration algorithm that corrected lens distortions and lens-sensor geometric misalignments were developed.