It is based on images of an object in which each pixel acquires bands of light intensity data from the spectrums. In other words, where traditional VIS/NIR spectroscopy gives a spectrum that provides information about a milder property, imaging spectroscopy provides the basis for producing a two-dimensional property map.
Nofima Marin has been involved in developing a high resolution on-line instrument with spatial resolution at 0.5x1.0 mm^2 with 128 spectral bands in the area 400 to 1000 nm. This may be used for production line speeds of up to 40 cm/s. This technology fulfils the fishing industry's requirement for processing speed. Applications developed to date cover the detection of parasitic nematodes, blood, black lining and skin remnants in white fish fillet and blood and melanin spots in red fish fillet.
This activity also covers the development of instruments to handle analytical data. Scientists have come up with a pre-processing algorithm which simplifies calibrating of the system and which is particularly favourable for defection of small objects in a diffused medium such as a fish fillet.