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    ESTIMATION OF WHOLE VOLUME OF GREEN SHELLED MUSSELS USING THEIR GEOMETRICAL ATTRIBUTES OBTAINED FROM IMAGE ANALYSIS
    (Taylor & Francis Inc, 2014) Alcicek, Zayde; Balaban, Murat Omer
    Aquacultured green shelled mussels are an important export product of New Zealand. Using image analysis, several geometrical attributes of live mussels were measured. The volume of individual live mussels was estimated by several methods. When the cubic splines method was applied to top and side view images, volume was estimated with a coefficient of determination of R-2 = 0.97. When only the top view area was used, the R2 decreased to 0.94. When the side view area was also included and empirical equations were fitted to estimate whole volume, the R-2 was 0.97. When measured length, width, and thickness were used to estimate volume, the R-2 was 0.95. There was a wide variation of the measured density of live mussels (1.05-1.27 g/cm(3)). Also, the condition index of the live mussels varied between 48 and 95. There was no correlation between the size of the mussel and its condition index. The mass of the mussel meat could not be accurately predicted by using the whole mass of the live mussel.
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    Use of polarized light in image analysis: Application to the analysis of fish eye color during storage
    (Elsevier, 2015) Balaban, Murat Omer; Alcicek, Zayde
    The evaluation of the eye is one method to determine the state of the fish: it is expected that the eye will start as black, transparent, and convex, and during storage it will become progressively lighter in color, more opaque, and will be sunken. Image analysis is an objective method to measure color. In this study, a method was developed to define a region of interest within the image of the eye, and to analyze its color. The effects of using polarized or non-polarized illumination, the dry or wet condition of the fish, and the eye touching ice during storage or being only exposed to air were determined. The L* values of the eye of the fish on the side touching the ice behaved as expected: L* values increased during storage for 7 or 11 days. However, the eye exposed only to air during storage on ice had significantly lower L* values. Wet or dry conditions did not affect L* values, however the eyes illuminated by non-polarized light had higher L* values than those illuminated by polarized lighting. These results should be considered when developing subjective or automated methods to evaluate fish by examination of their eyes. (C) 2014 Elsevier Ltd. All rights reserved.