彩色数码相机单幅RGB图像光谱重建研究

发布时间：2018-08-06 16:06

【摘要】：通过彩色数码相机单幅RGB图像的响应值重建物体表面的光谱反射率,不仅可以有效避免基于带通滤光片光谱成像系统存在的通道间图像像素偏移问题,而且可以缩短图像采集周期和获得高空间分辨率的光谱图像,但是光谱重建误差受光谱重建方法的影响。提出了一种基于相机响应值扩展和局部反距离加权优化的光谱重建方法,以CIEDE2000色差和光谱均方根误差为评价指标,以600个矿物颜料色块为实验样本,利用佳能600D型数码相机对所提方法进行了验证,并与当前几种较先进的方法进行了对比。实验结果表明,所提方法的平均CIEDE2000色差和平均光谱均方根误差分别降低到1.0389和0.0230,所提方法的光谱重建精度优于当前几种较先进方法的光谱重建精度。
[Abstract]:The spectral reflectivity of the object surface can be reconstructed by the response value of a single RGB image of a color digital camera, which can not only effectively avoid the problem of pixel migration between channels based on the band-pass filter spectral imaging system. It can also shorten the period of image acquisition and obtain the spectral image with high spatial resolution, but the spectral reconstruction error is affected by the spectral reconstruction method. A spectral reconstruction method based on camera response value expansion and local inverse distance weighted optimization is proposed. The color difference of CIEDE2000 and root mean square error of spectrum are taken as evaluation indexes, and 600 mineral pigment blocks are used as experimental samples. The proposed method is verified by Canon 600D digital camera and compared with several advanced methods. The experimental results show that the average CIEDE2000 color difference and the mean spectral root mean square error of the proposed method are reduced to 1.0389 and 0.0230 respectively, and the spectral reconstruction accuracy of the proposed method is better than that of several more advanced methods.
【作者单位】：武汉大学印刷与包装系;
【基金】：国家自然科学基金(61275172,61575147) 国家973计划(2012CB725302)
【分类号】：TP391.41

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