Camera Focal Length and the Perception of Pictures. [PDF]
Ecol Psychol, 2014 Photographers, cinematographers, and computer-graphics engineers use certain techniques to create striking pictorial effects. By using lenses of different focal lengths, they can make a scene look compressed or expanded in depth, make a familiar object look natural or distorted, or make a person look smarter, more attractive, or more neurotic ...
Banks MS, Cooper EA, Piazza EA.
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Method for determining uncertainty and error in the process of ophthalmic lens calibration
TecnoLógicas, 2021 In the present investigation, a scientific procedure was developed, and a mathematical model was proposed, with the objective of determining, under standard conditions, the uncertainty, and the measurement of dioptric power in ophthalmic lenses.
Alejandro Salgar-Marín +2 more
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Pose and Focal Length Estimation Using a Point and a Line With Known Camera Position
IEEE Access, 2023 2D-3D point or line correspondences are usually used to estimate the camera pose and intrinsic parameters, such as the focal length. There are many point-based methods and line-based methods, i.e., PnP solvers and PnL solvers.
Kai Guo +5 more
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PARAMETERS OF THE CURVE OF LOCAL ESTIMATE DISTRIBUTION AS IMAGE QUALITY MEASURES
Системный анализ и прикладная информатика, 2018 This article focuses on selecting the best quality image from the series without the reference image. The results of studies of a new approach to digital image quality assessment, based on the local quality estimates distribution, are presented.
F. V. Starovoitov, V. V. Starovoitov
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Variable-Focus Liquid Lens Integrated with a Planar Electromagnetic Actuator
Micromachines, 2016 In this paper, we design, fabricate and characterize a new electromagnetically actuated variable-focus liquid lens which consists of two polymethyl methacrylate (PMMA) substrates, a SU-8 substrate, a polydimethylsiloxane (PDMS) membrane, a permanent ...
Liang Wang +3 more
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COMPARATIVE ANALYSIS OF NO-REFERENCE QUALITY MEASURES FOR DIGITAL IMAGES
Системный анализ и прикладная информатика, 2017 This paper presents results of a comparative analysis of 34 measures published in the scientific literature and used for evaluation of the image quality without a reference image.
V. V. Starovoitov, F. V. Starovoitov
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Design of an Electrically Tunable Micro-Lens Based on Graded Photonic Crystal
Crystals, 2018 A micro-lens with an adjustable focal length (FL) is designed by using Graded Photonic Crystal (GPC) structures and a Polymer Dispersed Liquid Crystal (PDLC) material.
YongLe Qi +4 more
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Ocellar structure and neural innervation in the honeybee
Frontiers in Neuroanatomy, 2014 Honeybees have a visual system composed of three ocelli (simple eyes) located on the top of the head, in addition to two large compound eyes. Although experiments have been conducted to investigate the role of the ocelli within the visual system, their ...
Yu-Shan eHung, Michael Robert Ibbotson
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Tunable Focus Liquid Lens with Radial-Patterned Electrode
Micromachines, 2015 A dielectric liquid lens is prepared based on our previous work. By optimizing the device structure, the liquid lens presents a converging focus with good resolution and changes its focal length over a broad range with a low driving voltage. For a liquid
Miao Xu, Xiahui Wang, Hongwen Ren
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Statistical-Experimental Investigation of the Effect of Focal Length and Displacement on Laser Drilling of Hastelloy-X Superalloy Sheet using Single Pulse Fiber Laser [PDF]
Journal of Advanced Materials in EngineeringIntroduction and Objectives: In this research, the laser drilling process was carried out by a single pulse method and the effect of displacement and focal length parameters on the geometry of the hole (Inlet diameter, Outlet diameter, Taper, and ...
Mostafa Ghadimi Dafrazi +4 more
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