Dual-band UV/IR optical sensors for fire and flame detection and target recognition

The Integrated Active Stereoscopic Vision Theory, Integration and Application

“…For examples, the passive [Belhumeur, 1993] [Cochran & Medioni, 1992] and active [Hyun & Gerhardt, 1994] [Valkenburg & McIvor, 1998] stereoscopic methods or methods based on time of flight of a light pulse (monochromatic waves) [Gokturk et al, 2004] [Gruss et al, 1991] [Lange & Seitz, 2001]. Nevertheless, these methods are costly in material and/or temporal resources thus limiting their application in emergent domain such sensor networks for distributed 3D cartography, that could be used for the characterization of an asteroid [Stooke, 1991] and in vivo 3D endoscopy where an important depth and shape information can be added to 2D vision systems as the PillCam by GivenImaging [GivenImaging, 2005].…”

“…The projective model of the camera (considered ideal), also call pinhole model, links the coordinates of a point in the "world" referential to the image [Faugeras, 1993] , 1995]. It describes the relative position between the "world" and the image referential and the projection process.…”

“…To solve the correspondence ambiguity problem, we use the epipolar constraint: A laser impact can only belong, in the image, to the projection of the line supporting the laser ray. This projection represents the epipolar line [Faugeras, 1993]. We can thus simplify the correspondence search, limiting it to this line (one dimension search).…”

Si image sensors with wide spectral response and high robustness to ultraviolet light exposure

“…These include absorption and emission spectrometers, flame detectors, surface defect detectors, satellite cameras, surveillance cameras and so on [1,2,3,4,5,6,7,8,9,10,11,12,13,14]. These instruments are used in a variety of scientific and engineering fields: chemical, life scientific and medical analyses, material science and semiconductor manufacturing, factory automation, environmental assessment and space vision [1,2,3,4,5,6,7,8,9,10,11,12,13,14]. Image sensors used in these fields are required to have high sensitivity through 200 to 1000 nm or selected waveband of these.…”

Enhanced UV-blue response of back illuminated deep double junction CMOS compatible photodiode pixels; a simulation study of high resolution pixel arrays

“…These applications include flame and fire detection [1], astronomy [2], nuclear scintillation detectors [3], and electrophoretic band detection [4]. Back illuminated arrays also have application in particle physics, plasma spectroscopy and astrophysics [5].…”