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The Use and Implementation of Body-Worn Cameras in Policing

Details: body-worn camera debate. Others claim that the use of the technology is an effective way to hold law enforcement accountable, while those opposing say it is another way for police agencies to become corrupt. These concerns will be addressed in the thesis by collecting literary support and previous research conducted on the sensitive topic of

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Dark Current Measurements in a CMOS Imager

Details: Dark current is a major source of noise in digital imagers. To decrease the generation of dark current, many camera systems are cooled. In some cases, e.g. consumer cameras , a cooling system is not feasible and dark current can become a problem even for short exposures. A standard method for dark current correction is to take a so-called

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Dark current behavior in DSLR cameras

Details: camera was set to an ISO setting of 1600 and the external temperat ure within the enclosure wa s 24°C with a temperature increase within the enclosure of approximately a degree for the entire run. Fi gure 1a shows the response of eight pixels on the imager. Pixel coordinates are …

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"Team Project Report on DSLR Camera Choosing for 18-30

Details: A 3-level Hierarchical Decision Model (HDM) is established in this paper to help 18-30 year old college students make a decision of choosing a desirable digital single-lens reflex camera (DSLR). The HDM has been utilized in this paper because it measures the relative contribution of each criterion to the final decision based on quantified judgments of the respondents.

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Real-time Object Detection And Tracking On Drones

Details: DJI Matrice100 with DJI ZenmuseX3 camera. DJI Manifold built on top of NVIDIA TegraK1 which is a 32-bit architecture and low power onboard computer. Data transmission: The flight controller, Manifold, and camera are connected together using 8-pin and 10-pin cables. Raw video stream data extracted from the camera are converted from YUV into RGB

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A Literature Review on Body-Worn Cameras for Law …

Details: whether a body-camera worn during a police interaction would reduce the likelihood of the officer using force and whether a body-camera would reduce the number of complaints against officers. It is clear why these questions were the primary questions of research for these large

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"Development of a Nephelometry Camera and Humidity

Details: A Nephelometry camera (NephCam) and Humidity Controlled Cavity Ring-Down Transmissometer (HC-CRDT) were developed for the determination of aerosol optical properties. The NephCams use a reciprocal geometry relative to an integrating nephelometer; a diode laser illuminates a scattering volume orthogonal to a charge coupled device (CCD). The use of a CCD allows for …

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Development of a Nephelometry Camera and Humidity

Details: A Nephelometry camera (NephCam) and Humidity Controlled Cavity Ring-Down Transmissometer (HC-CRDT) were developed for the determination of aerosol optical properties. The NephCams use a reciprocal geometry relative to an integrating nephelometer; a diode laser illuminates a scattering volume orthogonal to a charge coupled device (CCD).

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Playing with History: A Black Camera Interview with Kevin

Details: Title: Playing with History: A Black Camera Interview with Kevin Willmott Author: Derrais Carter Created Date: 2/2/2021 4:03:01 PM

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"Digital Single-Lens Reflex Camera Technology Forecasting

Details: With the advancement of digital image technology, the biggest change in the camera market is that digital single-lens reflex cameras (DSLRs) have replaced film type single-lens reflex cameras, which have seen very little development lately. This advancement is reflected in some core technologies of DSLRs such as digital image sensors and electronic shutter mechanisms, which have allowed taking

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Correction of dark current in consumer cameras

Details: the camera body and by camera manufacturers’own efforts to deal with dark noise.As dark current is one of the largest sources of noise in digital imagers, camera manufacturers implement their own systems for removing the noise to provide better pictures at longer exposure times. Most com-monly for images at long exposures, a second image with a

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The LA Uprising on Camera: The Changing Mediascape and Its

Details: Apr 10th, 10:45 AM Apr 10th, 12:00 PM. The LA Uprising on Camera: The Changing Mediascape and Its Influence on Conceptions of Race and Poverty. Using the LA Riots as a case study, this paper examines the impact broadcast journalism had on electoral politics in America by deconstructing the media discourse surrounding the event and reviewing the electorate’s response.

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"Will Camera Phones ever replace the Compact Cameras

Details: Virtually all mobile phones available today have embedded cameras and many of them have multi-megapixel resolutions. With the specifications and features of the smartphone cameras have improved, many users choose smartphones for casual photography and HD-movie clips leaving their compact point-and-shoot cameras and video camcorders at home. In this research paper we attempt to answer the

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"Choosing the best “Follow-Me” Drone Camera System for the

Details: 2016 was termed as the year of the drones. Since 2012 this technology market has grown tremendously with 1.9 Billion in sales last year. [1] Most of the electronic components have been driven by low prices with high capabilities such as GPS and accelerometers. One of the amazing technology product is a “Follow-Me drone camera system”. This autonomous drone system will change professional

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Absolute Blood Velocity Measured with a Modified Fundus …

Details: retina. Our modified fundus camera uses illumination from a green LED and captures imagery with a high-speed CCD camera. The basic theory is presented, and typical results are shown for an. in vitro. flow model using blood in a capillary tube. Subsequently, representative results are shown for representative fundus imagery. This approach

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Technology Forecasting of Digital Single-Lens Reflex

Details: all camera market approach provided less accurate results with a high standard deviation or MAD value. I. INTRODUCTION With the advancement of digital image technology, the big change in the camera market is that digital single-lens reflex cameras (DSLRs) have replaced film type single-lens reflex cameras, which have seen very little development

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"Application of Hierarchy Decision Model in Selecting a

Details: Shopping for a digital single‐lens reflex (DSLR) camera would be stressful. A newcomer to the camera world will be presented with an array of options. It’s hard to keep tracking of the various specifications, models, brand etc. Also, one cannot find “a best digital camera” with all the features incorporated in a single piece. There’s no such thing as a perfect or the best camera.

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Autonomous Navigation and Hazard Evasion Platform for

Details: Multi-camera systems have simulated depth in-formation from stereoscopic vision [6] while sin-gle camera platforms have been used to inform probabilistic motion models [7][8]. Integrating sensor and vision systems has produced struc-tured light devices capable of digitally recreat-ing a 3D environment such as the Xbox Kinect

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"Decision-Making Model on DSLR Camera Choosing for 18 ∼ 30

Details: A 3-level Hierarchical Decision Model (HDM) 111 is established in this paper to help 18-30 year old college students make a decision of choosing a desirable digital single-lens reflex camera (DSLR) from 5 famous DSLR camera manufacturers. The HDM has been utilized in this paper, because it measures the relative contribution of each criterion to the final decision based on quantified judgments

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"Ring Video Doorbell Marketing Plan" by Rodolfo Barce

Details: Ring Video Doorbell (RVD) is an internet connected doorbell device. It is a component of the home security and smart home market. The entry level RVD is a plug and play installation and works with all major OS. RVD is available globally, but most active within the US market. The current target market is middle income residential homes, we have a three-year plan to extend to our adjacent

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"Real-time Object Detection And Tracking On Drones" by Tu Le

Details: Furthermore, attaching additional computing power or hardware to drones is not feasible due to weight constraints. We aim to implement machine learning algorithms for the drones to perform real-time object detection and tracking using on-board camera and low-power embedded system.

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Calibration of a CCD Camera and Correction of its Images

Details: Calibration of a CCD camera and correction of its images Charge-Coupled-Device (CCD) cameras have opened a new world in astronomy and other related sciences with their high quantum efficiency, stability, linearity, and easy handling. Nevertheless, there is still noise in raw . CCD . images and even

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Measurement of Oxygen Saturation in the Retina with a

Details: [9] in 1963. Using a modified fundus camera, they imaged the retina at two different wavelengths and extracted the vessels optical density with the Beer-Lambert law. Pittman and Dulling [10] in 1975 showed that more accurate results of retinal oximetry could be achieved using three wavelengths instead of two.

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Absolute Blood Velocity Measured with a Modified Fundus Camera

Details: We present a new method for the quantitative estimation of blood flow velocity, based on the use of the Radon transform. The specific application is for measurement of blood flow velocity in the retina. Our modified fundus camera uses illumination from a green LED and captures imagery with a high-speed CCD camera. The basic theory is presented, and typical results are shown for an in vitro

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Decision-Making Model on DSLR Camera Choosing for 18 30

Details: Decision-Making Model on DSLR Camera Choosing for 18 ∼ 30 Years Old College Students Pei Zhang Portland State University Chih-Jen Yu Portland State University Jiabing Zhang Portland State University Monticha Khammuang Portland State University Dundar F. Kocaoglu Portland State University

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High-speed Video from Asynchronous Camera Array

Details: a camera array can better meet the demand for high data throughput from high-speed imaging than a single-sensor camera as the processing of individual imaging sensors, such as compression, can be highly parallel. Finally, using a single-sensor camera to capture high-speed video limits the exposure time, leading to noisy images. A camera array

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Social Constructs in Film Culture: The Effect of it on the

Details: framework of the scene; the high angles of the camera’s position, the lack of shot/reverse shots between her and the ogling men, and the way the audience is forced to track with her around the stage. She is in control, not the men in the audience. The character herself

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"Calibration of a CCD Camera and Correction of its Images

Details: Charge-Coupled-Device (CCD) cameras have opened a new world in astronomy and other related sciences with their high quantum efficiency, stability, linearity, and easy handling. Nevertheless, there is still noise in raw CCD images and even more noise is added through the image calibration process. This makes it essential to know exactly how the calibration process impacts the …

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"High-speed Video from Asynchronous Camera Array" by Si Lu

Details: This paper presents a method for capturing high-speed video using an asynchronous camera array. Our method sequentially fires each sensor in a camera array with a small time offset and assembles captured frames into a high-speed video according to the time stamps. The resulting video, however, suffers from parallax jittering caused by the viewpoint difference among sensors in the …

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"Marketing Plan for the DJI Phantom 4 Follow-Me Drone

Details: Dajiang Innovation Technology Co. (DJI) was founded in 2006 as a hobbyist venture, but soon transformed into the world’s largest drone manufacturer. The company’s main aim is to develop a flying - camera stabilization system - to capture amazing photos and video. DJI technology does more than simply enable creators. They push visionaries to go beyond the limits of what is thought possible

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"Application of the HierarchicalDecision Model in Choosing

Details: Nowadays, choosing the optimum camera became a diff icult process due to the large varieties in models and brands available in the market. The objective of the decision making process here is to choose the optimum digital camera for regular consumers who are lookin g for a point-and-shoot camera. The Hierarchical Decision Model (HDM) methodology will be used to determine the best alternative

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"Image Stitching: Handling Parallax, Stereopsis, and Video

Details: One unique challenge for video stitching is how to maintain temporal coherence. To address this problem, we propose to consistently stitch frames with the guidance of the target camera motion path. In particular, we develop two techniques using dense motion maps and sparse motion vectors to compute the target camera motion path.

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Characterization and correction of dark current in compact

Details: the digital imagers within the camera frame are prone to heat generated by nearby elements within the camera body. It is the scope of this work to characterize the dark current in such cameras and to show th at the dark current, in part due to heat generated by the camera itself, can be corrected for by using hot pixels on the imager. This method

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Photographic Studies of Laser-Induced Bubble Formation in

Details: camera captured 12 pictures with an adjustable interframe time. The photographs were taken with 1 ms exposure time and 25 ms interframe time. The 12 frames were captured on a 1152 3 770 pixel CCD chip with the image read directly into a PC for data analysis. The illumination light was ad-justed using a neutral density wheel ~50G00AV.2, New-port!.

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"Technology Forecasting of Digital Single-Lens Reflex

Details: With the advancement of digital image technology, the big change in the camera market is that digital single-lens reflex cameras (DSLRs) have replaced film type single-lens reflex cameras, which have seen very little development lately. This advancement is reflected in some core technologies of DSLRs such as digital image sensors and electronic shutter mechanisms, which have allowed taking

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High-speed Video from Asynchronous Camera Array (Poster)

Details: Explores camera arrays for high-speed videography Sequentially firing each sensor in a camera array with a small time offset An economic solution for high-speed video capturing: using cheap normal-speed sensors Could flexibly exploit expensive high speed (FPS) cameras → …

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Joint Stabilization and Direction of 360° Videos

Details: Joint Stabilization and Direction of 360 Videos. CHENGZHOU TANG, Simon Fraser University. OLIVER WANG, Adobe Systems Inc. FENG LIU, Portland State University

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Improved Gain Stability of a Digital Imager Using a Charge

Details: One such factor is the stability of the camera’s gain, the ratio that dictates the im-ager’s ability to convert incident photons to a measurable output voltage. Variations in gain can a ect the linearity of the device and produce inaccurate measurements. One of the factors …

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Infrared-Based Measurements of Velocity, Turbulent Kinetic

Details: 640x512 QWIP array camera (8-9.2 m spectral response, 25 mK NETD) was affixed in a down-looking position (13.9˚ incidence) atop a 6 m tower on the end of the frame, such that the field of view included the surface locations of the ADV measurements. Fig. 1. (a) Photograph of …

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"Dark current behavior in DSLR cameras" by Justin Charles

Details: Digital single-lens reflex (DSLR) cameras are examined and their dark current behavior is presented. We examine the influence of varying temperature, exposure time, and gain setting on dark current. Dark current behavior unique to sensors within such cameras is observed. In particular, heat is trapped within the camera body resulting in higher internal temperatures and an increase in dark

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A Novel Laser and Video-Based Displacement Transducer to

Details: the video camera point of view, the fixed reference moves showing an opposite movement of the target. Sensors. 2018, 18, 970 3 of 15. A relevant amount of the research published uses video-based sensors to measure the dynamic response of structures, that is, natural vibration frequency and damping ratio, among others. Also,

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User Centred Innovation Project Group 4 Personal

Details: • Does owning a camera improve anyone`s income? • How much do you want to spend on camera accessories? Which camera accessories would you consider buying first? (tri-pod, bag, spare lens ect…) • How long have you had your camera? • How many cameras do you own? Do you also own a camera-phone? Which camera do you use more often? Why?

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"Correction of dark current in consumer cameras" by Justin

Details: A study of dark current in digital imagers in digital singlelens reflex (DSLR) and compact consumer-grade digital cameras is presented. Dark current is shown to vary with temperature, exposure time, and ISO setting. Further, dark current is shown to increase in successive images during a series of images. DSLR and compact consumer cameras are often designed such that they are contained …

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Segmentation of thermographic images of hands using a

Details: far-infrared images of hands were acquired using ThermaCAM AM40 thermographic camera (FLIR Systems, Wilsonville, OR) with a sampling rate of 7 HZ. Subjects were given a nine minute typing challenge and images were taken at the following intervals: before typing, 0-2 minute (post-typing), 3-5 minute (post-typing), and 8-10 minute (post-typing).

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