Fig. 1From: Consumers’ perceptions and preference profiles for wood surfaces tested with pairwise comparison in GermanyFifteen Norway spruce floor samples each composed of ten single floor boards, representing 15 visual classes (see Table 1). The images presented online represent floor samples of originally 2-m height (600 pixels) and 1-m width (300 pixels). The framed samples were used in the consumer preference testBack to article page