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Research on the Denoise Method of Speckle Image Contour and Background

When the laser spot is irradiating directly on the surface of the measured object, the accuracy of the center coordinate value (CCV) of the speckle will affect the depth information. A lens imaging model of monocular vision and laser spot combination was established, the analytical relationship between CCV of the speckle and depth information was derived, the causes of speckle contour noise and background noise were expounded, the denoise method was proposed and the corresponding denoise algorithm was designed. Finally, the simulation verifies that the proposed method is feasible by theoretical data, and the proposed algorithm enables to ensure the robustness of CCV of the speckle.