noise estimation
................\Automatic noise estimation in images using local statistics.pdf
................\icip2012_camera_ready.pdf
................\Image Noise Level Estimation by.pdf
................\main.asv
................\main.m
................\NoiseLevel.asv
................\NoiseLevel.m
................\PCAnoise.asv
................\PCANoiseLevelEstimator.m
................\varmode.m