P. David et Wjj. Fermont, DETERMINATION OF COAL MACERAL COMPOSITION BY MEANS OF COLOR IMAGE-ANALYSIS, Fuel processing technology, 36(1-3), 1993, pp. 9-15
With the development of Colour Image Analysis Systems (CIAS) which are
capable of processing multi-colour images it has become possible to d
efine more complex optical units in comparison to black and white imag
e analysis systems. The colour composition of each maceral group can b
e defined by intensity levels of three different colours, i.e. red, gr
een, blue, thus allowing the user to characterise macerals within smal
l diagnostic thresholds. This investigation presents the results of th
e application of CIAS (Cue 3, Olympus) to coal petrology. Maceral grou
p analyses have been carried out on a series of 7 high to medium volat
ile bituminous coals from the Carboniferous Coal Measures of The Nethe
rlands, using both conventional point count analysis (PCA) and CIAS. T
he results show that CIAS is applicable to maceral group analysis of c
oals of different ranks. CIAS is time efficient as compared to PCA.