Abstract:In order to solve no feedback problem in measuring and modeling process, a new method of free-from surface's reverse engineering was proposed, making data acquisition and surface reconstruction form a closed-loop system, so the time of the whole reverse engineering was shortened, the quality of reconstructed models was improved. The core was the CMM adaptive measuring method and non-uniform B-spline surface reconstruction method were used to integrate the free-from surface measuring and modeling in a closed-loop system, realizing the CMM real-time online measurement and reconstructed surface real-time update.