Wavelet-based image restoration for compact X-ray microscopy.
J Microsc
; 211(Pt 2): 154-60, 2003 Aug.
Article
in En
| MEDLINE
| ID: mdl-12887709
ABSTRACT
Compact water-window X-ray microscopy with short exposure times will always be limited on photons owing to sources of limited power in combination with low-efficency X-ray optics. Thus, it is important to investigate methods for improving the signal-to-noise ratio in the images. We show that a wavelet-based denoising procedure significantly improves the quality and contrast in compact X-ray microscopy images. A non-decimated, discrete wavelet transform (DWT) is applied to original, noisy images. After applying a thresholding procedure to the finest scales of the DWT, by setting to zero all wavelet coefficients of magnitude below a prescribed value, the inverse DWT to the thresholded DWT produces denoised images. It is concluded that the denoising procedure has potential to reduce the exposure time by a factor of 2 without loss of relevant image information.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
X-Rays
/
Image Enhancement
/
Microscopy
Type of study:
Evaluation_studies
Language:
En
Journal:
J Microsc
Year:
2003
Document type:
Article
Affiliation country:
Suecia