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In situ quantification of noise as a function of signal in digital images

机译:数字图像中噪声随信号的原位量化

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摘要

An efficient and accurate algorithm for determining the magnitude of noise as a function of signal in an arbitrary digital image is presented and demonstrated. The algorithm is robust and largely independent of the form of the image, returning the noise function with subcount error across the full dynamic range of a synthetic test image where noise of a known form has been added. The noise performance of a CCD under different image recording and processing conditions is examined using the algorithm. The effect of different noise functions on pattern-matching measurements of electronic structure by quantitative convergent beam electron diffraction is investigated.
机译:提出并演示了一种有效且准确的算法,用于确定随噪声变化的数字信号中信号强度的大小。该算法是鲁棒的,并且在很大程度上与图像的形式无关,在添加了已知形式的噪声的合成测试图像的整个动态范围内,返回具有子计数误差的噪声函数。使用该算法检查了CCD在不同图像记录和处理条件下的噪声性能。通过定量会聚束电子衍射研究了不同噪声函数对电子结构图案匹配测量的影响。

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