The macroporosity of Parallam®, a structural wood-based product based on parallel strand lumber technology, was investigated using two imaging techniques. A video camera and a line scan camera were used to capture the images of thin Parallam® squares viewed in transmitted light. Quantification of macro-void areas in the images recorded was performed using an image analysis system. Total macro-void areas determined for fifty Parallam® squares ranged from 2.90% to 3.90% as determined using the video camera and from 1.29% to 2.24% as determined using the line scan camera. The relative merits of the two imaging systems are discussed.