Fast noise variance estimation
Computer Vision and Image Understanding
Digital Image Processing (3rd Edition)
Digital Image Processing (3rd Edition)
Training methods for image noise level estimation on wavelet components
EURASIP Journal on Applied Signal Processing
Automatic Estimation and Removal of Noise from a Single Image
IEEE Transactions on Pattern Analysis and Machine Intelligence
Automatic noise estimation in images using local statistics. Additive and multiplicative cases
Image and Vision Computing
Fast and reliable structure-oriented video noise estimation
IEEE Transactions on Circuits and Systems for Video Technology
Robust Noise Estimation Based on Noise Injection
Journal of Signal Processing Systems
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Noise estimation is an important premise for image denoising and the related research therefore has drawn increasing attention and interest. Recent studies show that the distribution mode of local variances in natural image can be used as a simple yet efficacious estimator of the additive noise variance, no matter what distribution the noise follows. However, this type of method has the limitation that the target image must have a sufficiently large area with low pixel value variations. Furthermore, this type of noise estimator almost always lead to overestimation without taking into account the mode of local variance distribution of the noise-free image in textural regions. To improve the accuracy of distribution-mode analysis type of noise estimation and to resolve the problem of overestimation, we propose a novel algorithm using a cascade of wavelet sub-band estimation and noise-injection based rectification. The proposed algorithm reduces the detrimental influence of textural image area, and therefore alleviating overestimation of the noise variance. Extensive experiments and comparative study show the reliability and superiority the proposed method over some existing competitors.