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基于复合抖动技术的三维轮廓数据压缩方法
Three-dimensional profile data compression based on composite dithering technique
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摘要: 三维扫描技术获取的三维轮廓数据体积较大，不便于三维数字博物馆数据的实时传输和显示。针对这个问题，提出了基于复合抖动技术的三维轮廓数据压缩方法。首先，利用虚拟结构光投影系统实现三维轮廓数据的图像存储。然后，对图像的不同通道使用不同的抖动技术进行处理，并将结果保存到8位灰度图中主要的3位或者3幅1位逻辑图中，实现三维轮廓数据的进一步压缩存储。实验表明，与提供的三维模型格式相比提出方法的数据压缩比高达75．9∶1，非常适合三维轮廓数据的实时传输、重建与显示。Abstract: The size of three dimensional (3D)profile data is too large for the 3D digital museum to properly transmit and display in real time.To solve the problem,this paper proposes a 3D profile data compression method based on composite dithe-ring technique.Firstly,3D profile data are stored into 24 bit image by utilizing the virtual structured-light projection system. Then,different dithering methods are applied to the different channels of the image,and the results are saved into the three most significant bits of the 8 bit grayscale image or three 1 bit logical images,to achieve a further compression of 3D profile data.The experimental results show that the proposed method achieves a compression ratio up to 75.9 ∶1 compared with the provided 3D model format,and is very suitable for real-time transmission,reconstruction and display of 3D profile data.
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