Resin pockets, common in softwoods, are small lenses of resin oriented along annual rings. When using Norway spruce for making joinery products, resin pockets are considered as serious defect. CT- and RGB-scanning with various illumination were tested for contrast between resin-pockets and other wood properties. UV light in combination with the RGB-sensor showed good possibility to detect resin pockets on open wood surfaces while the other methods showed less contrast between the resin pockets and other wood properties. Segmentation of resin pockets within the 3-D volume was compared for the different sensors using 3-D graphical methods extracting segmentation from 2-D slices of the test piece. The obtained 3-D volumes can be used for investigation of the 3-D spatial representation of resin pockets in spruce.