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by He, PD and Su, LJ and Yuan, Y and Lv, QB and Wang, JW and Bin, XL
OPTICS EXPRESS, ISSN 1094-4087, 07/2019, Volume 27, Issue 15, pp. 21116 - 21129
In this study, a spectral acquisition method is proposed in which axial chromatic and spherical aberrations are introduced as an error function. These... 
DEFOCUS | OPTICS
Journal Article
Applied Optics, ISSN 1559-128X, 05/2018, Volume 57, Issue 15, pp. 4267 - 4276
We introduce a flexible error correction method for fringe projection profilometry (FPP) systems in the presence of local blur phenomenon. Local blur caused by... 
SHAPE | DEFOCUS | OPTICS
Journal Article
Journal of the Optical Society of America A: Optics and Image Science, and Vision, ISSN 1084-7529, 03/2018, Volume 35, Issue 3, pp. 480 - 490
In this paper, we propose a method named region mosaicking on Laplacian pyramids (RMLP) to fuse multi-focus images that are captured by microscope. First, we... 
SHAPE | DEFOCUS | OPTICS
Journal Article
Pattern Recognition, ISSN 0031-3203, 2011, Volume 44, Issue 9, pp. 1852 - 1858
In this paper, we address the challenging problem of recovering the defocus map from a single image. We present a simple yet effective approach to estimate the... 
Gaussian gradient | Image processing | Defocus blur | Defocus magnification | Defocus map | SHAPE | DEPTH | COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE | ENGINEERING, ELECTRICAL & ELECTRONIC | Kernels | Recovering | Propagation | Images | Gaussian | Pattern recognition | Estimates | Ambiguity
Journal Article
Optik, ISSN 0030-4026, 01/2020, Volume 201, p. 163483
The paper analyses a possibility of determination of axial defocus of lighting point, which is imaged by an optical system without aberrations, from a... 
Microscopy | Defocus | Imaging | OPTICS
Journal Article
Optics Express, ISSN 1094-4087, 03/2016, Volume 24, Issue 6, pp. 5946 - 5960
A system approach to acquire a three-dimensional object distribution is presented using a compact and cost efficient camera system with an engineered point... 
CEPSTRUM | DEFOCUS | STEREO | OPTICS | DEPTH
Journal Article
OPTICS EXPRESS, ISSN 1094-4087, 10/2019, Volume 27, Issue 21, pp. 29697 - 29709
The state-of-the-art 3D shape measurement system has rather shallow working volume due to the limited depth-of-field (DOF) of conventional lens. In this paper,... 
DEFOCUS | ALL-IN-FOCUS | OPTICS
Journal Article
Optics Express, ISSN 1094-4087, 01/2011, Volume 19, Issue 1, pp. 261 - 270
The key issue in passive autofocus is to choose robust focus measures to judge optical blur in defocused images. Existing focus measures are sensitive to image... 
DEFOCUS | SHAPE | OPTICS | DEPTH
Journal Article
IEEE Transactions on Circuits and Systems for Video Technology, ISSN 1051-8215, 05/2019, Volume 29, Issue 5, pp. 1365 - 1379
Journal Article
Applied Optics, ISSN 1559-128X, 08/2018, Volume 57, Issue 22, pp. E138 - E141
Depth estimation is a classic machine vision and image processing problem aiming at mapping the distances of objects from the camera. The accuracy of this... 
FROM-DEFOCUS SYSTEMS | OPTICS | DEPTH | ACCURACY
Journal Article
Investigative ophthalmology & visual science, ISSN 0146-0404, 01/2019, Volume 60, Issue 1, pp. 218 - 225
PURPOSE. To investigate the action of atropine on global flash multifocal electroretinogram (gmfERG) responses to retinal defocus. METHOD. gmfERG recordings... 
Myopic defocus | Atropine | Electrophysiology | Retina | Hyperopic defocus | ACTIVATION | AMACRINE CELLS | MYOPIA CONTROL | EFFICACY | REFRACTIVE DEVELOPMENT | hyperopic defocus | EYE GROWTH | PREVALENCE | electrophysiology | retina | DOPAMINE | OPHTHALMOLOGY | myopic defocus | atropine | PERIPHERAL RETINA | PROGRESSION
Journal Article
Journal of Structural Biology, ISSN 1047-8477, 11/2015, Volume 192, Issue 2, pp. 216 - 221
CTFFIND is a widely-used program for the estimation of objective lens defocus parameters from transmission electron micrographs. Defocus parameters are... 
Phase plate | CTF | Defocus | Astigmatism | BIOPHYSICS | IMAGES | BIOCHEMISTRY & MOLECULAR BIOLOGY | RESOLUTION | CONTRAST | PARAMETERS | MICROSCOPY | CELL BIOLOGY | Image Enhancement - methods | Software | Algorithms | Microscopy, Electron, Transmission - methods | Imaging, Three-Dimensional - methods | Analysis | astigmatism | defocus | phase plate
Journal Article
IEEE Transactions on Image Processing, ISSN 1057-7149, 05/2019, Volume 28, Issue 5, pp. 2107 - 2115
Journal Article
Optics Express, ISSN 1094-4087, 09/2016, Volume 24, Issue 18, pp. 21070 - 21080
Wavefront coding system can realize defocus invariance of PSF/OTF with a phase mask inserting in the pupil plane. Ideally, the derivative of the PSF/OTF with... 
MICROSCOPE | DEFOCUS | EXTENSION | OPTICS | EXTENDED DEPTH | FIELD
Journal Article
Journal Francais d'Ophtalmologie, ISSN 0181-5512, 05/2012, Volume 35, Issue 5, pp. 338 - 342
Purpose: To assess the visual and refractive outcomes after implantation of the FineVision trifocal IOL (PhysIOL, Belgium). Site: Albi, France. Methods: Twenty... 
Multifocal | Diffractive | Defocus | Trifocal
Journal Article
Clinical and Experimental Optometry, ISSN 0816-4622, 01/2020, Volume 103, Issue 1, pp. 104 - 111
The human visual system is amenable to a number of adaptive processes; one such process, or collection of processes, is the adaptation to blur. Blur adaptation... 
adaptation | blur | defocus | Visual system | Adaptation
Journal Article
Journal Article
Optica Applicata, ISSN 0078-5466, 2014, Volume 44, Issue 4, pp. 521 - 531
The relationship between spherical and astigmatic refractive errors and their associated visual acuity is investigated in this work by means of two different... 
Zernike polynomials | Power vector | Visual acuity | Lens-induced defocus | Simulated defocus | Astigmatism | astigmatism | power vector | DEFOCUS | IMAGE | lens-induced defocus | visual acuity | BLUR | LANDOLT-C | OPTICS | simulated defocus | CHARTS
Journal Article
OPTICS EXPRESS, ISSN 1094-4087, 06/2017, Volume 25, Issue 12, pp. 13883 - 13896
Recording digital holograms without wave interference simplifies the optical systems, increases their power efficiency and avoids complicated aligning... 
IMAGING-SYSTEM | DEFOCUS | LAGRANGE INVARIANT | FRESNEL HOLOGRAPHY | RESOLUTION | CONFIGURATION | OPTICS | MICROSCOPY | DEPTH | VIOLATION
Journal Article
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