基于线性化动态范围变换的光学投影层析三维成像
发布时间：2018-07-16 18:15
【摘要】：传统的光学投影层析受相机感光元件动态范围及曝光时间的限制,难以对具有复杂空间结构分布的样品获取其完整且精细的三维结构信息。针对传统光学投影层析三维成像系统存在的问题,提出了在传统光学投影层析技术中引入朗伯体光源以及线性化动态范围变换的新方法。使用朗伯体光源照射样品,通过多次曝光分别对样品进行图像采集,获取相机实际响应曲线,线性化处理曲线中非线性响应区域以解决传统多次曝光动态范围变换存在的非线性失真和假象问题,然后应用图像融合技术对多次曝光获取的原始图像数据进行融合,运用反投影算法重构样品三维成像,从而获得具有复杂空间结构样品的精细三维结构信息。理论分析与成像结果表明,这种基于光学投影层析的三维结构成像新方法可以获得复杂空间结构样品更多的信息。
[Abstract]:The traditional optical projection tomography is limited by the dynamic range and exposure time of the camera's photosensitive elements, so it is difficult to obtain the complete and fine three-dimensional structure information for the samples with complex spatial structure distribution. Aiming at the existing problems of traditional optical projection tomography three-dimensional imaging system, a new method of introducing Lambert volume light source and linearizing dynamic range transform into traditional optical projection tomography technology is proposed. The sample was irradiated with a Lambert body light source, and the image was collected by multiple exposures, and the actual response curve of the camera was obtained. The nonlinear response region in the linearized processing curve is used to solve the nonlinear distortion and false image problems existing in the traditional multi-exposure dynamic range transformation. Then the image fusion technique is applied to fuse the original image data obtained by multiple exposures. In order to obtain the fine 3D structure information of the sample with complex spatial structure, the backprojection algorithm is used to reconstruct the 3D image of the sample. Theoretical analysis and imaging results show that the new 3D structure imaging method based on optical projection tomography can obtain more information of complex spatial structure samples.
【作者单位】： 华南师范大学物理与电信工程学院;佛山科技学院电子与信息工程学院;广东省量子调控工程与材料重点实验室;
【基金】：国家自然科学基金(61575067) 广东省自然科学基金重点项目(S201302002810)
【分类号】：TP391.41
本文编号：2127225
[Abstract]:The traditional optical projection tomography is limited by the dynamic range and exposure time of the camera's photosensitive elements, so it is difficult to obtain the complete and fine three-dimensional structure information for the samples with complex spatial structure distribution. Aiming at the existing problems of traditional optical projection tomography three-dimensional imaging system, a new method of introducing Lambert volume light source and linearizing dynamic range transform into traditional optical projection tomography technology is proposed. The sample was irradiated with a Lambert body light source, and the image was collected by multiple exposures, and the actual response curve of the camera was obtained. The nonlinear response region in the linearized processing curve is used to solve the nonlinear distortion and false image problems existing in the traditional multi-exposure dynamic range transformation. Then the image fusion technique is applied to fuse the original image data obtained by multiple exposures. In order to obtain the fine 3D structure information of the sample with complex spatial structure, the backprojection algorithm is used to reconstruct the 3D image of the sample. Theoretical analysis and imaging results show that the new 3D structure imaging method based on optical projection tomography can obtain more information of complex spatial structure samples.
【作者单位】： 华南师范大学物理与电信工程学院;佛山科技学院电子与信息工程学院;广东省量子调控工程与材料重点实验室;
【基金】：国家自然科学基金(61575067) 广东省自然科学基金重点项目(S201302002810)
【分类号】：TP391.41
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