Imaging light space tracking lingual surface colored three-dimensional imaging method and system

Abstract

The invention relates to a visual three-dimensional measurement technology, in order to realize accurate and rapid acquisition of color three-dimensional point cloud data of the tongue surface, improve the accuracy of traditional Chinese medicine diagnosis, and realize accurate acquisition of color three-dimensional information on the upper and lower surfaces of the tongue. The technical solution adopted by the present invention is that the imaging light space traces the tongue surface color three-dimensional imaging system, which is composed of a color CCD camera, two inline lasers, a high-speed precision electric lifting platform, a white LED ring light source, a computer and an image acquisition card. Among them, the line structured light sensor Ⅰ composed of a line laser Ⅰ and a color CCD camera completes the scanning measurement of the upper surface of the tongue; the line structured light sensor Ⅱ composed of a line laser Ⅱ and a CCD camera completes the scanning measurement of the lower surface of the tongue. The invention is mainly applied to the occasion of color three-dimensional imaging.

Description

technical field [0001] The present invention relates to visual three-dimensional measurement technology, specifically, to a method and system for imaging ray space tracing tongue surface color three-dimensional imaging. Background technique [0002] Tongue diagnosis is a method to understand the physiological functions and pathological changes of the human body by observing the appearance of the tongue. The analysis and judgment of traditional tongue diagnosis are often affected by factors such as the doctor's personal experience and the patient's environment, and have a certain degree of subjectivity. Since the early 1980s, many research institutions at home and abroad have cooperated in the objective study of tongue diagnosis. At present, most of these studies are based on the analysis and diagnosis of two-dimensional tongue images. However, two-dimensional tongue images cannot provide tongue diagnosis information. The three-dimensional information of the body, such as th...

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Problems solved by technology

Among them, the pinhole imaging perspective transformation model is an ideal situation established according to the camera imaging principle, and its system measurement accuracy is limited by the adjustment error of the optical system, lens distortion, and image acquisition error, etc.; the analytical geometric model needs to know the optical axis and optical plane of the camera The three-dimensional information of the measurement point can be solved by the spatial analysis method, but the system often cannot provide these parameters during the actual measurement; the space mapping model establishes the coordinates of the image coordinates (u, v) to the coordinates of the spatial measurement point on the light plane (X w ,Y w ), but the spatial measurement point (X w ,Y w ,Z w ) to the coordinate mapping relationship of the image point (u, v), so it is difficult to complete color rendering accurately and quickly

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