Fig. 4From: Traceability and quality assessment of Norway spruce (Picea abies (L.) H.Karst.) logs: the TreeTrace_spruce databaseRGB images of cross-section E024B_le taken with Huawei device at FVA Baden-Württemberg (Freiburg). The first image (left) was taken before cutting the disc, the other three after cutting the discBack to article page