Results 231 to 240 of about 102,502 (260)

Sensors Based on In-Pixel Photo-Mixing Devices

2013
The first Time-Of-Flight (TOF) 3D scanning systems were realized in the 1970s for military and space applications [1]. Both pulsed operation and CW modulation, either AM or FM, were used. Scanning systems have steadily improved in the following decades [2, 3, 4], evolving into commercial products for 3D metrology and modelling applications, although ...
Pancheri, Lucio, Stoppa, David
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Automatic thresholding abundance fractional images for mixed pixel classification

IEEE International Geoscience and Remote Sensing Symposium, 2003
Mixed pixel classification is different from spatial-based image classification in the sense that the former deals with abundance fractional images resulting from mixed pixels as opposed to classification maps produced by the latter. As a result, mixed pixel classification is generally carried out by visual inspection on the generated abundance ...
Shao-Shan Chiang, Chein-I Chang
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Parallel processing of remotely sensed hyperspectral imagery: full‐pixel versus mixed‐pixel classification

Concurrency and Computation: Practice and Experience, 2008
AbstractThe rapid development of space and computer technologies allows for the possibility to store huge amounts of remotely sensed image data, collected using airborne and satellite instruments. In particular, NASA is continuously gathering high‐dimensional image data with Earth observing hyperspectral sensors such as the Jet Propulsion Laboratory's ...
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Orthogonal Bases Approach for the Decomposition of Mixed Pixels in Hyperspectral Imagery

IEEE Geoscience and Remote Sensing Letters, 2009
The N-FINDR algorithm has been widely used in hyperspectral image analysis for endmember extraction due to its simplicity and effectiveness. However, there are several disadvantages of implementing the N-FINDR. This letter proposes an algorithm for decomposition of mixed pixels. It improves the N-FINDR in several aspects.
Xuetao Tao, Bin Wang 0008, Liming Zhang 0001   +2 more
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A fusion method for mixed pixels based on prior type judgment

2007 IEEE International Geoscience and Remote Sensing Symposium, 2007
In reality, a low-spatial-resolution (LR) mixed pixel superimposes some high-spatial-resolution (HR) pixels, some of which are mixed and some of which are pure. In current fusion methods, mixed multispectral pixels are seldom discriminated from pure pixels and specifically processed.
Linhai Jing, Qiuming Cheng
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Stereo reconstruction with mixed pixels using adaptive over-segmentation

2008 IEEE Conference on Computer Vision and Pattern Recognition, 2008
We present an over-segmentation based, dense stereo algorithm that jointly estimates segmentation and depth. For mixed pixels on segment boundaries, the algorithm computes foreground opacity (alpha), as well as color and depth for the foreground and background.
Yuichi Taguchi, Bennett Wilburn, C. Lawrence Zitnick   +2 more
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Customizing time of flight modulation codes to resolve mixed pixels

ACM SIGGRAPH 2013 Posters, 2013
We couple custom binary sequences with sparsity based approaches to address the multi-path problem in time of flight imaging. In particular, we utilize maximum length m-sequences that allow us to produce non band-limited correlation functions. Coupled with a tailored sparse deconvolution approach, we are able to resolve the constituent phases and ...
Achuta Kadambi, Refael Whyte, Ayush Bhandari, Lee V. Streeter, Christopher Barsi, Adrian A. Dorrington, Ramesh Raskar   +6 more
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Consequences of Mixed Pixels on Temperature/Emissivity Separation

2007
This report investigates the effect that a mixed pixel can have on temperature/emissivity seperation (i.e. temperature/emissivity estimation using long-wave infra-red data). Almost all temperature/emissivity estimation methods are based on a model that assumes both temperature and emissivity within the imaged pixel is homogeneous.
Patrick Heasler, Michael Foley, Sandra Thompson   +2 more
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The use of Hough transform to mixed pixel classification

IEE Colloquium on Image Processing for Remote Sensing, 1996
Burned forest regions have to be monitored for several years after the fire so that the regeneration processes can be evaluated. The authors assess the danger of desertification conditions ensuing in the site of a burned forest in the Mediterranean region.
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A mixed-signal CMOS DTCNN chip for pixel-level snakes

2004 IEEE International Symposium on Circuits and Systems (IEEE Cat. No.04CH37512), 2004
This paper introduces the processing core of a full-custom mixed-signal CMOS chip intended for pixel-level snakes. Among the different parameters to optimize on the top-down design flow our methodology is focused on area. This approach results in a single-instruction-multiple-data chip implemented by a DTCNN with a correspondence between pixel and ...
Víctor M. Brea 0001, David López Vilariño, Diego Cabello   +2 more
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