van Meeteren A, Valeton J M
Institute for Perception, Netherlands Organization for Applied Scientific Research, Soesterberg.
J Opt Soc Am A. 1988 Mar;5(3):438-44. doi: 10.1364/josaa.5.000438.
In order to evaluate the potential gain of noise-suppression techniques, visual detection of sine-wave gratings in images with additive fine- and coarse-grain pictorial noise was investigated. An important part of the threshold elevations caused by pictorial noise can be explained in terms of masking. The threshold elevation can be reduced by about a factor of 7 through intelligent image processing. In addition to masking by similar noise components, the detection of low-spatial-frequency target detail can also be hindered by high-spatial-frequency noise components. Correspondingly, the detection of lower spatial frequencies can be improved moderately by blurring.
为了评估噪声抑制技术的潜在增益，研究了在具有加性细粒度和粗粒度图像噪声的图像中对正弦波光栅的视觉检测。图像噪声引起的阈值升高的一个重要部分可以用掩蔽来解释。通过智能图像处理，阈值升高可降低约7倍。除了被类似噪声成分掩蔽外，低空间频率目标细节的检测也会受到高空间频率噪声成分的阻碍。相应地，通过模糊可以适度提高较低空间频率的检测。
