**4. Results of surface scans**

This section will show the results of using the HWT for various surfaces. In review, the surface quality assessment system is being designed to assist wood product manufacturers in monitoring their machining operations and alert them if the operation or the product quality changes during the machining process. To that end, the system must be able to scan the surface, analysis the data and make a decision on the state of the operation in an acceptable time frame. Information in the frequency domain can be limited to below 50 marks per inch since very high spatial frequencies are not of importance to the manufacturer. However, higher frequencies still must be included in order to detect the localized defects in the frequency domain.
