color segmentation of inked characters : application to meat traceability control (MA-P1)

Author(s) : Michèle Gouiffès (Cemagref, France) Christine Fernandez-Maloigne (IRCOM SIC, Poitiers, France) Alain Trémeau (LIGIV, St etienne, France) Christophe Collewet (Cemagref, France)

Abstract : Our work deals with traceability of porcine products. We have to segment the animal identifier, printed with blue ink on the pork rind. The inhomogeneousness of the pork rind color and the variability of the quantity of ink printed are likely to complicate this segmentation task. In this article, we study the color appearance of the ink printed on a background,according to both its concentration and the background color. We find some attributes, the concentration quotients ratios, that are more invariant to the ink concentration than the simple color attributes. Using the concentration quotients ratios, our segmentation technique succeeds for any quantity of ink, and any hue of pork rind. This technique could be applied to segment any set of pixels, that are colorimetrically and spatially close, but not necessarily all connected.

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