This paper presents a study using Genetic Algorithms (GA) to solve the star pattern recognition problem associated with star tracker attitude determination systems. Characteristics of the stars that are visible within the Field of View (FOV) of an imager are defined with regard to relative distances and angles. The proposed GA minimizes the discrepancy between the characteristics of the stars i...

Background: Cardiac CT imaging is gaining in popularity. When imaging the heart with CT, additional structures are visualized, including the lungs. Whether the lung fields should be evaluated during cardiac CT imaging is controversial. Some cardiology groups believe that analyzing the lung fields will only lead to increased patient anxiety and increased costs without clinical benefit. Objective...

BACKGROUND The point spread function (PSF) of positron emission tomography (PET) depends on the position across the field of view (FOV). Reconstruction based on PSF improves spatial resolution and quantitative accuracy. The present study aimed to quantify the effects of PSF correction as a function of the position of a traceable point-like 22Na source over the FOV on two PET scanners with a dif...

Image quality issues such as field of view (FOV) and resolution are important for evaluating "presence" and simulator sickness (SS) in virtual environments (VEs). This research examined effects on postural stability of varying FOV, image resolution, and scene content in an immersive visual display. Two different scenes (a photograph of a fountain and a simple radial pattern) at two different re...

The remote sensor mounted on the Fengyun-3C (FY-3C) will decay naturally during operation, causing a decrease in accuracy of satellite data. Therefore, an effective monitoring method must be adopted to study performance changes instrument. theoretical expressions absolute and relative errors for earth field view (FOV) radiance together with its equivalent brightness temperature are given by ana...

Noninvasive imaging through scattering media using memory effect (ME) normally suffers from the failure of when object is beyond ME region, limiting its field view (FOV). Herein, a method to enlarge FOV proposed by utilizing point-spread-function (PSF) estimations and correlations. For first time, best knowledge, it successfully demonstrated that whole or multiple objects with right relative po...

Many applications have used a Head-Mounted Display (HMD), such as in virtual and mixed realities, and tele-presence. The advantage of HMD systems is the ease of feeling a 3D world in the display of animation or movies. However, the field of view (FOV) of commercial HMD systems is too narrow for feeling immersion. The horizontal FOV of many commercial HMDs is around 60 degrees, significantly nar...

PURPOSE To determine whether peripheral field loss (PFL) systematically distorts spatial representations and to determine whether persons with actual PFL show adaptation effects. METHODS Nine participants with PFL from retinitis pigmentosa (RP) learned the locations of statues in a virtual environment by walking a predetermined route. After this, the statues were removed and the participants ...

We present a complete characterization of shortest paths to a goal position for a vehicle with unicycle kinematics and a limited range sensor, constantly keeping a given landmark in sight. Previous work on this subject studied the optimal paths in case of a frontal, symmetrically limited Field–Of–View (FOV). In this paper we provide a generalization to the case of arbitrary FOVs, including the ...

Here we report a low-cost and simple wide field-of-view (FOV) on-chip fluorescence-imaging platform, termed fluorescence Talbot microscopy (FTM), which utilizes the Talbot self-imaging effect to enable efficient fluorescence imaging over a large and directly scalable FOV. The FTM prototype has a resolution of 1.2 μm and an FOV of 3.9 mm × 3.5 mm. We demonstrate the imaging capability of FTM on ...