This paper presents the factors that influence the form scanning processing by using the laser: light ambient, scanning surface, motion axial, focal length of the camera. This paper will present the method to reduce the error of the environment by using the camera calibration algorithms and the coordinate movements. | TAÏP CHÍ PHAÙT TRIEÅN KH&CN, TAÄP 17, SOÁ K2- 2014 Errors reducing method of Laser 3D scanner • Phan Huynh Lam • Nguyen Thanh Nam • Pham Van Duy DCSELAB, University of Technology, VNU-HCM (Manuscript Received on December 11th, 2013; Manuscript Revised August 26th, 2014) ABSTRACT: This paper presents the factors that influence the form scanning processing by using the laser: light ambient, scanning surface, motion axial, focal length of the camera. This paper will present the method to reduce the error of the environment by using the camera calibration algorithms and the coordinate movements. This errors reducing method to solve the problem from local to genera: from solving errors created by the curve of the cameras to the laser-line width, to the dark gray threshold of the images by the camera aperture and coupling 2movement axis to scanning-coupling more effectively. Keywords: Laser line, 3D scanner, OpenCV. 1. GENERAL INTRODUCTION 3D Laser Scanner is a combination of a moving axis and a scanning ray. Therefore, if there is not a good coordination, the asynchrony will appear and cause errors. In addition, when the laser ray is projected on the surface will cause reflections effective. If it is not handled, we will not be able to scan objects. CCD camera has certain flatness in the work area; we need to flatten the whole surface, to avoid focal curves generated by the focal distance. Figure 1-a. Model of scanner rotation form: Simulating the design Trang 41 SCIENCE & TECHNOLOGY DEVELOPMENT, Vol 17, 2014 - Adjusting the parameters of images extracted from camera - Reducing the errors of capturing images when laser capture is projected to the object by using light aperture parameters adaptation self- configured.[4] With the model in the citation, Laser and space environment aren’t integratedly filtered. The model of integrated filter groups includes: - Laser filter. - Cameras filter. - Continuously reading data from encoder to identify the .
