Measuring and Rendering Art Paintings Using an RGB Camera
Measuring and Rendering Art Paintings Using an RGB Camera
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使用 RGB 相机测量和渲染艺术绘画
DOI：
10.2312/egs.20021000
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
N. Tanaka
中科院分区：
文献类型：
--
作者：
S. Tominaga;N. Tanaka
提出了一种仅使用RGB摄像机的简单系统来测量和绘制艺术颜料的方法。艺术画的表面形状被认为是一个粗糙的平面，而不是一个三维曲面。由于表面材料具有二色性反射特性，光谱反射率函数由漫反射分量估计。首先，我们提出了一种算法，用于估计表面法线在每个像素点，基于扩展的光度立体，而不使用测距仪。接下来，提出了一种用于从在不同照明方向上获取的一组RGB颜色值估计光谱反射率函数的算法。然后，利用表面反射率和法线数据估计光反射特性。Torrance-Sparrow模型用于模型拟合和参数估计。最后，通过一幅油画的实验验证了该方法的可行性。
A method is proposed for measuring and rendering of art paints by using the simple system of an RGB camera only. The surface shape of an art painting is considered as a rough plane rather than a three-dimensional curved surface. Because the surface material has the dichromatic reflection property, the spectral reflectance function is estimated from the diffuse reflection component. First, we present an algorithm for estimating surface normal at each pixel point, based on an extended photometric stereo without using a rangefinder. Next, an algorithm is presented for estimating the spectral reflectance function from a set of RGB color values acquired at different illumination directions. Then, the surface reflectance and normal data are used for estimating the light reflec-tion properties. The Torrance-Sparrow model is used for the model fitting and parameter estimation. Finally, an experiment using an oil painting is executed for demonstrating the feasibility of the proposed method.