Quantitative Evaluation of Focus Measure Operators in Optical Microscopy [PDF]
SensorsGiven the variety of focus measure operators, selecting an appropriate one based on scene requirements is critical. This study designs evaluation metrics based on the morphological characteristics of focus measure curves.
Weiying Piao +3 more
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Use of focus measure operators for characterization of flood illumination adaptive optics ophthalmoscopy image quality. [PDF]
Biomed Opt Express, 2018 Adaptive optics flood illumination ophthalmoscopy (AO-FIO) allows imaging of the cone photoreceptor in the living human retina. However, clinical interpretation of the AO-FIO image remains challenging due to suboptimal quality arising from residual uncorrected wavefront aberrations and rapid eye motion. An objective method of assessing image quality is
Alonso-Caneiro D +4 more
europepmc +5 more sources
Pirate stealth or inattentional blindness? The effects of target relevance and sustained attention on security monitoring for experienced and naïve operators. [PDF]
PLoS ONE, 2014 Closed Circuit Television (CCTV) operators are responsible for maintaining security in various applied settings. However, research has largely ignored human factors that may contribute to CCTV operator error.
Erika Näsholm +2 more
doaj +6 more sources
Improved Image Splicing Forgery Detection by Combination of Conformable Focus Measures and Focus Measure Operators Applied on Obtained Redundant Discrete Wavelet Transform Coefficients [PDF]
Symmetry, 2019 The image is the best information carrier in the current digital era and the easiest to manipulate. Image manipulation causes the integrity of this information carrier to be ambiguous. The image splicing technique is commonly used to manipulate images by fusing different regions in one image.
Thamarai Subramaniam +3 more
openaire +3 more sources
Combining Focus Measure Operators to Predict OCR Accuracy in Mobile-Captured Document Images [PDF]
2014 11th IAPR International Workshop on Document Analysis Systems, 2014 Mobile document image acquisition is a new trend raising serious issues in business document processing workflows. Such digitization procedure is unreliable, and integrates many distortions which must be detected as soon as possible, on the mobile, to avoid paying data transmission fees, and losing information due to the inability to re-capture later a
Rusiñol, Marçal +2 more
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Image Quality Assessment for Performance Evaluation of Focus Measure Operators [PDF]
Mehran University Research Journal of Engineering and Technology, 2015 This paper presents the performance evaluation of eight focus measure operators namely Image CURV (Curvature), GRAE (Gradient Energy), HISE (Histogram Entropy), LAPM (Modified Laplacian), LAPV (Variance of Laplacian), LAPD (Diagonal Laplacian), LAP3 ...
Farida Memon +2 more
doaj +3 more sources
Positive-Operator Valued Measure (POVM) Quantization
Axioms, 2014 We present a general formalism for giving a measure space paired with a separable Hilbert space a quantum version based on a normalized positive operator-valued measure.
Jean Pierre Gazeau, Barbara Heller
doaj +4 more sources
Autostereoscopic 3D Measurement Based on Adaptive Focus Volume Aggregation
Sensors, 2023 Autostereoscopic three-dimensional measuring systems are a kind of portable and fast precision metrology instrument. The systems are based on integral imaging that makes use of a micro-lens array before an image sensor to observe measured parts from ...
Sanshan Gao, Chi Fai Cheung
doaj +2 more sources
Spectral preservation fusion for remote sensing images using focus measure operators based on fast discrete curvelet transform and hyperspherical color space [PDF]
Journal of Applied Remote Sensing, 2018 How to preserve the spectral information when enhancing the spatial details is a key issue of remote sensing image fusion. The component substitution (CS)-based fusion methods can effectively enhance the spatial details while suffering spectral distortion, and multiresolution analysis (MRA)-based methods have advantages in preserving spectral ...
HaiSheng Cai +3 more
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All in Focus Image Generation based on New Focusing Measure Operators
International Journal of Advanced Computer Science and Applications, 2016 To generate an all in focus image, the Shape-From-Focus (SFF) is used. The SFF key is finding the optimal focus depth at each pixel or area in an image within sequence of images. In this paper two new focusing measure operators are suggested to be used for SFF.
H. Shamardan
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