Patent ID: 7777897

Claim:
An apparatus for assessing surface roughness of a wood test surface, comprising: an illumination source configured to direct a first illumination flux and a second illumination flux to a wood test surface along a first axis of incidence and a second axis of incidence, respectively, the first and second illumination fluxes having different wavelengths; an imaging system configured to produce a first image of a selected portion of the wood test surface based on the first illumination flux and a second image of the selected portion of the wood test surface based on the second illumination flux; and a processor configured to provide an indication of the surface roughness of the wood test surface on the first image and the second image; wherein the processor is configured to produce a combined image of the selected portion based on the first image and the second image, the combined image having a single intensity value for each image location and edge filter the combined image to generate the indication of the surface roughness.