期刊文献+

用线性补偿算法和CCD响应补偿来提高频谱OCT图像质量 被引量:7

Improvement of spectral domain OCT image quality by linear interpolation and CCD response compensation
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摘要 在频谱光学相干析成像(频谱OCT)系统中普遍使用的CCD采样的数据是波长的函数。CCD对不同波长的信号具有不同的响应,而且图像重建进行的傅里叶逆变换所需要的数据是波数的函数,忽略这两个问题对频谱OCT成像质量的影响比较大。基于以上分析,提出了响应度补偿法和波长数据-波数数据转换线性补偿法,并对样品进行了实验验证。实验结果表明,该方法能够将OCT图像的信噪比(SNR)提高约30%,明显改善了图像质量。 Data collected by CCD camera is a function of wavelength in Spectral-Domain Optical Coherence Tomography (SDOCT) system. By consideration of a wavelength-depended response characteristics of CCD and the Fourier transform relationship between time (distance) and frequency (wave-number), the CCD data must be responsivity-compensated and resampled by linear interpolation in frequency space. Based on the above analysis, the CCD response compensation method and the linear interpolation arithmetic were suggested and tested by the sample imaging. Results show that signal-tonoise ratio (SNR) increases a 30% in proposed method and arithmetic mentioned above, and the OCT image quality is greatly improved.
出处 《光学精密工程》 EI CAS CSCD 北大核心 2006年第5期929-933,共5页 Optics and Precision Engineering
基金 国家自然科学基金项目(No.60674111)
关键词 光学相干层析术 CCD响应 信噪比 线性补偿 频谱OCT Optical Coherence Tomography(OCT) CCD response signal-to-noise ratio linear interpolation spectral-domain OCT
作者简介 张泰石(1962-),男,朝鲜开城人,天津大学精仪学院物理电子学专业博士研究生,朝鲜金日成综合大学物理学院研究员,研究方向为光学测量及图像处理、激光器开发及应用等。E—mail:zhangtaesok@cyou.com 李刚(1959-),博士,教授,天津大学精密仪器及光电子工程学院。Email:ligang59@tju.edu.cn
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参考文献13

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