Biomedical materials have different optical properties (e.g. absorption) for different wavelengths. Therefore, probing biomedical materials with multiple wavelengths not only can get in-depth understanding of the detected biomedical materials but also can differentiate the detected biomedical materials. To achieve this purpose, in this conference paper, we present our initial results of building up a portable multiple-wavelength biomedical sensing system. At this initial phase, we assembled this kind of system with multiple wavelengths of light sources and photodetectors and preliminarily tested the absorbance of the glucose solutions with different concentrations. The result shows good linearity of the absorbance of the glucose solution with concentration. In addition, we also measured the absorbance of the glucose solutions using a broadband white light source and a spectrometer. This result also exhibits linearity but different slop of absorbance with glucose concentration, which confirms the linearity result obtained from the built sensing system. The difference of slop maybe relates to the difference of optical design between these two systems.

In this study, we demonstrated the feasibility of using a handheld optical coherence tomography (OCT) for in vivo visualizations of the microstructural and microvascular features of various oral mucosal types.To scan arbitrary locations of the oral mucosa, a scanning probe was developed, composed of a probe body fabricated by a 3D printer, miniaturized two-axis galvanometer, relay lenses, and reflective prism.With a 3D printing technique, the probe weight and the system volume were greatly reduced, enabling the effective improvement of imaging artifacts from unconscious motion and system complexity.Additionally, in our design, the distal end of the probe can be switched to fit various oral conditions, and the optical parameters of the probe, such as the transverse resolution, working distance, and probe length can be easily varied.The results showed that the epithelium and lamina propria layers, as well as the fungiform papilla and salivary gland, were differentiated.Moreover, various microcirculation features at different mucosal sites were identified that are potentially effective indicators for the diagnosis of premalignant lesions.The demonstrated results indicate that the developed OCT system is a promising tool for noninvasive imaging of oral mucosae.

Thesimulation of 3D Chinese ink painting style is an important research topic of theNon-Photorealistic Rendering(NPR). The traditional rendering methods are mostly confined to black and white ink. This paper puts forward a contour optimization of multi-channel 3D ink rendering model. Firstly, this method completes the inner coloring of multi-color ink by using the illumination model with the Alpha channel. Then it achieves contour stylization by means of the grid model expansion and texture map. Lastly, it hides the excess contours on the Alpha channel through the table priority algorithm of 3D depth sorting method for achieving the output of 3D Chinese ink rendering images. The experimental results demonstrate that the rendering effects under contour stylization provide more vivid ink effects. And the output of multi-channel images facilitates the following images procession as well.

Three-dimensional display technology has developed fast in recent years, resulting in gradual attention to ink-style simulation in three-dimensional space. Currently, most studies on three-dimensional ink style drawings aim at the existing three-dimensional animals and plants models, but researches on terrain generation are rare. Based on freehand-ink-style analog in three-dimensional terrain, by simulating freehand-ink-style in three-dimensional terrain, an advanced Catmull-Rom spline interpolation algorithm is advocated, and reduces the next vertex computation in shading and reaches a smoother topography. The results provide a method based on gray-colored ink-style, and an easy speculation of the effect on Ink changes in the terrain changes, thus successfully achieving ink landscape mist misty mood.

This paper started with a two-dimensional image of ancient Chinese architecture. Firstly, it detected edge of target to obtain the contour and detected its corner points, which would be used to get contour curve equation. Then a rotating body reconstruction method based on the cross-sectional radius was proposed. It realizes the modeling of 3D rotation. What's more, non-photorealistic rendering of the three-dimensional model was also achieved.

目的中国水墨风格模拟是非真实感图像模拟的重要研究课题,现有的模拟算法对于边缘绘制的连贯性不足、颜色汇聚不平滑,导致效果生硬,色彩表现力不强。为此提出一种真实图像转换的方法来对图像进行水墨风格化处理。方法首先利用改进的基于流的高斯差分滤波来生成边缘轮廓;接着运用各向异性Kuwahara滤波实现墨色的汇聚以及自然过渡;最后引入Perlin噪声模拟背景宣纸的褶皱感。结果本文方法能够实现真实图像输入到水墨画风格图像输出的转换,处理速度快。结论实验结果表明,该方法可以在不破坏原图像结构的基础上获得很好的水墨模拟效果。