Digital Image Processing

Burger, Wilhelm; Burge, Mark J.

doi:10.1007/978-1-84628-968-2

Cited by 253 publications

(99 citation statements)

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“…Remaining straight lines with a maximal dip angle of ±45 • from the horizontal (namely CBs) were detected by using a Hough transformation (Hough and Arbor, 1960). In this approach every line connecting two or more pixels is represented as a point in a parameter space (offset and slope), and the strongest lines are identified with a voting procedure (see for example: Burger and Burge, 2008). Between 1500 m-2100 m, CBs are clearly visbile and approximately 8-15 CBs are detected per image.…”

Section: Line-scans and Ice-core Characteristicsmentioning

confidence: 99%

Layer disturbances and the radio-echo free zone in ice sheets

et al. 2009

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Abstract. Radio-echo sounding of the Antarctic and Greenlandic ice sheets often reveals a layer in the lowest hundreds of meters above bedrock more or less free of radio echoes, known as the echo-free zone (EFZ). The cause of this feature is unclear, so far lacking direct evidence for its origin. We compare echoes around the EPICA drill site in Dronning Maud Land, Antarctica, with the dielectric properties, crystal orientation fabrics and optical stratigraphy of the EPICA-DML ice core. We find that echoes disappear in the depth range where the dielectric contrast is blurred, and where the coherency of the layers in the ice core is lost due to disturbances caused by the ice flow. At the drill site, the EFZ onset at ∼2100 m marks a boundary, below which the ice core may have experienced flow induced disturbances on various scales. The onset may indicate changing rheology which needs to be accounted for in the modeling of ice sheet dynamics.

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Section: Line-scans and Ice-core Characteristicsmentioning

confidence: 99%

Layer disturbances and the radio-echo free zone in ice sheets

et al. 2009

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“…La clave del procesamiento de imagen en la investigación radica en la identificación y extracción de regiones en imágenes binarias [7]. En una imagen binaria, cada uno de los pixeles toma solo uno de dos posibles valores.…”

Section: B Regiones En Imágenes Binariasunclassified

“…Estas derivadas se calculan por medio de convolución. La convolución es un barrido que no altera los operandos, que son el kernel (ahora en la forma de una matriz) y la imagen original [7]. El resultado de este barrido o interacción es la imagen filtrada.…”

Section: Filtro Sobel-prewittunclassified

“…El conjunto de técnicas y procesos utilizados para extraer información de interés de una imagen, utilizando como herramienta un sistema digital se conoce como procesamiento digital de imagen [7]. Este concepto se puede extender a nuevas herramientas tecnológi-cas, como es el caso de los sistemas embebidos, y es para la investigación de particular interés el caso de los smartphones y las tabletas electrónicas.…”

Section: I Introducción Introducciónunclassified

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Identificación visual sobre sistema embebido para navegación robótica autónoma

Ariza

2014

Ingenium Rev. fac. ing.

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Resumen ResumenEste artículo de investigación ataca el problema de la navegación robótica autónoma basada en sistemas de visión artificial en tiempo real. Como una primera aproximación a un sistema de visión artificial que permita la navegación del robot, se ha desacoplado el módulo sensor e implementado como una unidad independiente sobre un pequeño robot diferencial. Sobre él, se han realizado estudios básicos de navegación por identificación visual de landmarks (marcas especiales) en un ambiente desconocido. Los estudios de desempeño, realizados tanto a través de simulación como por evaluación directa sobre prototipos en laboratorio, demuestran la eficacia de las estructuras propuestas, tanto del hardware de identificación en tiempo real como de la estrategia básica de navegación considerada para su evaluación. Palabras claveAndroid, imágenes, procesamiento en tiempo real, sistema embebido.

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“…Subsequently, the image is binarized according to the isodata autothresholding procedure and touching features are blindly separated by the watershed algorithm. Both algorithms are built-in procedures in imageJ (29). Because the watershed algorithm often leads to oversegmentation of nuclei, due to small intensity or shape fluctuations, it is only activated after the first iteration of the segmentation algorithm.…”

Section: Image Analysismentioning

confidence: 99%

High content image cytometry in the context of subnuclear organization

et al. 2009

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The organization of proteins in space and time is essential to their function. To accurately quantify subcellular protein characteristics in a population of cells with regard for the stochasticity of events in a natural context, there is a fast-growing need for image-based cytometry. Simultaneously, the massive amount of data that is generated by image-cytometric analyses, calls for tools that enable pattern recognition and automated classification. In this article, we present a general approach for multivariate phenotypic profiling of individual cell nuclei and quantification of subnuclear spots using automated fluorescence mosaic microscopy, optimized image processing tools, and supervised classification. We demonstrate the efficiency of our analysis by determination of differential DNA damage repair patterns in response to genotoxic stress and radiation, and we show the potential of data mining in pinpointing specific phenotypes after transient transfection. The presented approach allowed for systematic analysis of subnuclear features in large image data sets and accurate classification of phenotypes at the level of the single cell. Consequently, this type of nuclear fingerprinting shows potential for high-throughput applications, such as functional protein assays or drug compound screening. ' 2009 International Society for Advancement of Cytometry

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Digital Image Processing

Cited by 253 publications

References 0 publications

Layer disturbances and the radio-echo free zone in ice sheets

Layer disturbances and the radio-echo free zone in ice sheets

Identificación visual sobre sistema embebido para navegación robótica autónoma

High content image cytometry in the context of subnuclear organization

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