Total variation versus wavelet-based methods for image denoising in fluorescence lifetime imaging microscopy.

Total variation versus wavelet-based methods for image denoising in fluorescence lifetime imaging microscopy.
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DOI:
10.1002/jbio.201100137
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发表时间:
2012-05
影响因子:
2.8
通讯作者:
Mycek, Mary-Ann
Mycek, Mary-Ann
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Chang, Ching-Wei;Mycek, Mary-Ann

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我们报告的第一个应用程序基于小波的去噪(噪声去除)方法的时域箱式荧光寿命成像显微镜(FLIM)图像和比较的结果,新的总变差(TV)去噪方法。方法首先在人工图像上进行测试,然后应用于低光活细胞图像。相对于未去噪图像,TV方法可以将人工图像中的寿命精度提高10倍,同时保留单指数衰减模型的寿命和振幅值的整体精度,并提高活细胞图像中的局部寿命拟合。基于小波的方法至少比TV方法快4倍,但可能会在恢复的寿命值中引入显著的不准确性。所讨论的去噪方法可以潜在地增强各种FLIM应用,包括活细胞、体内动物或内窥镜成像研究,特别是在具有挑战性的成像条件下,例如低光或快速视频速率成像。
We report the first application of wavelet-based denoising (noise removal) methods to time-domain box-car fluorescence lifetime imaging microscopy (FLIM) images and compare the results to novel total variation (TV) denoising methods. Methods were tested first on artificial images and then applied to low-light live-cell images. Relative to undenoised images, TV methods could improve lifetime precision up to 10-fold in artificial images, while preserving the overall accuracy of lifetime and amplitude values of a single-exponential decay model and improving local lifetime fitting in live-cell images. Wavelet-based methods were at least 4-fold faster than TV methods, but could introduce significant inaccuracies in recovered lifetime values. The denoising methods discussed can potentially enhance a variety of FLIM applications, including live-cell, in vivo animal, or endoscopic imaging studies, especially under challenging imaging conditions such as low-light or fast video-rate imaging.
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