Volume 30 #4

Contents

1. Mysteries of the blind zone and cone-enriched rim at the extreme periphery of the human retina
2. Crowding-effect in the centre of the visual eld in dependence on distractors layout
3. Projectively invariant description of non-planar smooth gures. 1. Preliminary analysis of the problem
4. Comprehensive assessment of the functional suppression scotoma in patients with strabismus
5. Binocular functions developing in patients sith strabismus by means of computerized treatment of the functional suppression scotoma
6. Perception of speech intonation in russian cochlear implant users
7. Auditory discrimination of pulse intensity under forward and backward masking: absolute and relative combination of the induced peripheral reaction
8. Noise estimation for multispectral visualization
9. Gluconobacter cells and thermally expanded graphite based biosensor

We propose the technique of improving multispectral local contrast preserving visualization in noisy environment. The technique is based on weighting of image bands according to estimations of their noise level. We consider two approaches to weighting coef cients calculation: the min/max autocorrelation factors (MAF) method and the new method that considers each channel as a realization of a parameterized gaussian process. Likelihood maximization gives the parameter values which are used to estimate noise. Validity of the ordering given by both methods is verified using manually marked multispectral dataset. We also show examples of visualization improvement obtained by bands weighting. The dataset used consists of publicly available real multispectral images.

Key words: multispectral images, multispectral visualization, noise estimation, local contrast preserving

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