A Day in the Digital Life: A Preliminary Sousveillance Study

Fletcher, Gordon; Griffiths, Marie; Kutar, Maria

doi:10.2139/ssrn.1923629

Cited by 11 publications

(7 citation statements)

References 15 publications

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“…by cameras borne by nonhuman objects. [2], [3], [4] B. Sousveillance: Putting cameras on people A more recently coined word is the word "sousveillance", which is an etymologically correct opposite formed by replacing the prefix "sur", in "surveillance", with its opposite, "sous" [2], [5], [6], [7]. Sousveillance generally refers to cameras borne by people, e.g.…”

Section: A Surveillancementioning

confidence: 99%

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Three dimensional high dynamic range veillance for 3D range-sensing cameras

Rampersad

Huang

et al. 2013

2013 IEEE International Symposium on Technology and Society (ISTAS): Social Implications of Wearable Computing and Augmediated

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Abstract-This paper presents the invention and implementation of 3D (Three Dimensional) HDR (High Dynamic Range) sensing, along with examples. We propose a method of 3D HDR veillance (sensing, computer vision, video capture, or the like) by integrating tonal and spatial information obtained from multiple HDR exposures for use in conjunction with one or more 3D cameras.In one embodiment, we construct a 3D HDR camera from multiple 3D cameras such as Kinect sensors. In this embodiment the 3D cameras are arranged in a fixed array, such that the geometric relationships between them remain constant over time. Only a single camera calibration step is required at the initial time of assembling and fixing the cameras into the array. Preferably the cameras either view from the same position through beam splitters, or are fixed close to one another, so that they capture approximately the same subject matter. The system is designed so the cameras each capture a differently exposed image or video of approximately the same subject matter. In one embodiment, two Kinect cameras are attached together facing in the same direction, with an ND (Neutral Density) filter over one of them, so as to obtain a darker exposure. The dark and light exposures are combined to obtain more accurate 3D sensing in high contrast scenes. In another embodiment, a single 3D camera is exposure-sequenced (alternating light and dark exposures).3D HDR might, more generally, be incorporated into existing 3D cameras, resulting in a new kind of 3D sensor that can work in nearly any environment, including high contrast scenes such as outdoor scenes, or scenes where a bright light is shining directly into the sensor.

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Section: A Surveillancementioning

confidence: 99%

“…Sousveillance generally refers to cameras borne by people, e.g. hand-held cameras or wearable cameras [2], [6], [7], [5], [8], [9]. "Sur" means "over" or "from above" (as in words like "surtax" or "surcharge"), wheras "Sous" means "under" or "from below" (as in "sous-chef").…”

Section: A Surveillancementioning

confidence: 99%

Three dimensional high dynamic range veillance for 3D range-sensing cameras

Rampersad

Huang

et al. 2013

2013 IEEE International Symposium on Technology and Society (ISTAS): Social Implications of Wearable Computing and Augmediated

View full text Add to dashboard Cite

show abstract

“…A more recently coined word is the word "sousveillance", which is an etymologically correct opposite formed by replacing the prefix "sur", in "surveillance", with its opposite, "sous" [2], [3], [4], [5]. (See last 3 entries of Table I.)…”

Section: Wearable Cameras As a Sousveillance Devicementioning

confidence: 99%

“…There are two kinds of sousveillance cameras: hand-held, and wearable [2], [4], [5], [3], [6], [7]. Of these, the wearable camera is the most challenging, technologically.…”

Section: Wearable Cameras As a Sousveillance Devicementioning

confidence: 99%

High dynamic range tone mapping based on Per-Pixel Exposure Mapping

Huang

Rampersad

Mann

2013

2013 IEEE International Symposium on Technology and Society (ISTAS): Social Implications of Wearable Computing and Augmediated

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Abstract-The needs of a realtime vision aid require that it functions immediately, not merely for production of a picture or video record to be viewed later. Therefore the vision system must offer a high dynamic range (often hundreds of millions to one) that functions in real time. In compliment with the existing efficient and real-time HDR compositing algorithms, we propose a novel method for compressing High Dynamic Range (HDR) images by Per-Pixel Exposure Mapping (PPEM). Unlike any existing methods, PPEM only varies exposure to achieve tone mapping. It takes advantage of the camera response to enable exposure synthesis which we call Wyckoff set expansion. The method evaluates the synthetic exposures in a recursive pairwise process to generate a tone mapped HDR image. The results can be approximated using a look-up table, which can be used for real-time HDR applications.

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“…Sousveillance often refers to cameras borne by people, e.g. hand-held cameras or wearable cameras [2], [3], [4], [5], [6], [7]. watching over (oversight) surveillance to oversee (to watch from above) surveiller over (from above) sur under (from below) sous "undersight" (to watch from below) sousveillance…”

Section: Introductionmentioning

confidence: 99%

Comparametric HDR (High Dynamic Range) imaging for digital eye glass, wearable cameras, and sousveillance

Ali

Gill

et al. 2013

2013 IEEE International Symposium on Technology and Society (ISTAS): Social Implications of Wearable Computing and Augmediated

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Wearable computing can be used to both extend the range of human perception, and to share sensory experiences with others. For this objective to be made practical, engineering considerations such as form factor, computational power, and power consumption are critical concerns. In this work, we consider the design of a low-power visual seeing aid, and how to implement computationally-intensive computational photography algorithms in a small form factor with low power consumption.We present realtime an FPGA-based HDR (High Dynamic Range) video processing and filtering by integrating tonal and spatial information obtained from multiple different exposures of the same subject matter. In this embodiment the system captures, in rapid succession, sets of three exposures, "dark", "medium", and "light", over and over again, e.g. "dark", "medium", "light", "dark", "medium", "light", and so on, at 60 frames per second. These exposures are used to determine an estimate of the photoquantity every 1/60th of a second (each time a frame comes in, an estimate goes out).This allows us to build a seeing aid that helps people see better in high contrast scenes, for example, while welding, or in outdoor scenes, or scenes where a bright light is shining directly into the eyes of the wearer. Our system is suitable for being built into eyeglasses or small camera-based, lifeglogging, or gesturesensing pendants, and other miniature wearable devices, with low-power and compact circuits that can be easily mounted on the body.

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A Day in the Digital Life: A Preliminary Sousveillance Study

Cited by 11 publications

References 15 publications

Three dimensional high dynamic range veillance for 3D range-sensing cameras

Three dimensional high dynamic range veillance for 3D range-sensing cameras

High dynamic range tone mapping based on Per-Pixel Exposure Mapping

Comparametric HDR (High Dynamic Range) imaging for digital eye glass, wearable cameras, and sousveillance

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