Journal ArticleDOI
Bayesian Restoration of Partially Coherent Imagery in Conventional and Scanning Microscopy
Madjid Rabbani,Bahaa E. A. Saleh +1 more
TLDR
The use of bayesian techniques for image restoration under conditions of partial coherence in both CTEM and STEM is investigated and the effect of coherence and noise on the object restorability is assessed.Abstract:
The use of bayesian techniques for image restoration under conditions of partial coherence in both CTEM and STEM is investigated. Amplitude or phase objects are considered, assuming only a single intensity measurement. The weak-phase approximation is not used. An iterative algorithm for determining the maximum a posteriori probability restored image is determined by using the steepest ascent method. The effect of coherence and noise on the object restorability is assessed.read more
Citations
More filters
Journal ArticleDOI
Partially coherent microscope in phase space.
TL;DR: Explicit expressions are presented for different phase-space representations (mutual intensity, Wigner distribution function, and ambiguity function) of the partially coherent image wave field in a microscope system.
Journal ArticleDOI
Optimal pupil screen design for the estimation of partially coherent images
Roy M. Matic,Joseph W. Goodman +1 more
TL;DR: In this paper, the authors examined the effectiveness of optical preprocessing for image-estimation applications and showed that preprocessing is more effective for coherent systems than for incoherent systems.
Journal ArticleDOI
Comparison of optical predetection processing and postdetection linear processing for partially coherent image estimation
Roy M. Matic,Joseph W. Goodman +1 more
TL;DR: In this article, a comparison between the effectiveness of optical predetection processing and that of electronic post-detection filtering for image-estimation applications is made, and it is shown that optical preprocessing is more effective than post detection when the object illumination is coherent or nearly coherent, whereas the reverse is true for incoherent illumination.
Journal ArticleDOI
Bayesian filtering of speckled images
Madjid Rabbani,Bahaa E. A. Saleh +1 more
TL;DR: Speckle noise arises in imaging systems that use coherent or partially coherent illumination and it is demonstrated that such noise may be reduced by use of bayesian filters.
Journal ArticleDOI
Restoration of bilinearly distorted images. 3: Constrained least-squares method.
Madjid Rabbani,Bahaa E. A. Saleh +1 more
TL;DR: A constrained least-squares solution based on a second difference smoothing measure is obtained for images which are distorted by a bilinear (quadratic and with nonzero memory) system in the presence of additive signal-independent noise.
References
More filters
Journal Article
A practical algorithm for the determination of phase from image and diffraction plane pictures
TL;DR: In this article, an algorithm is presented for the rapid solution of the phase of the complete wave function whose intensity in the diffraction and imaging planes of an imaging system are known.
Journal ArticleDOI
Bayesian Methods in Nonlinear Digital Image Restoration
TL;DR: A model is used which explicitly includes nonlinear relations between intensity and film density, by use of the D-log E curve, and a maximum a posteriori (Bayes) estimate of the restored image is derived.
Book
Computer techniques for image processing in electron microscopy
W. O. Saxton,John M. Cowley +1 more
Journal ArticleDOI
Advances in Electronics and Electron Physics, Supplement 10, Computer Techniques for Image Processing in Electron Microscopy
Timothy K. Maugel,W. O. Saxton +1 more
Journal ArticleDOI
Image Formation in Scanning Microscopes with Partially Coherent Source and Detector
Colin J. R. Sheppard,Tony Wilson +1 more
TL;DR: In this article, the effect of partial coherence of both the source and the detector in a scanning microscope is investigated and the transfer function for the system is derived and various special cases discussed.