Michel Allenbach

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Coupled strata and granulometry detection on indurated cores by gray-level image analysis Abstract In this paper, we propose an approach combining both strata detection and grain analysis on images of indurated cores. We use high-resolution images (47 lm/pixel) for granulometry and low-resolution images (270 lm/pixel) for strata detection, stored in indexed(More)
Soil erosion is a major issue around the world. In the Pacific Islands, erosion has a strong impact on terrestrial and coastal ecosystems (mountains, alluvial plains, mangroves, coral reefs). Bush fire, deforestation and/or human activities accelerate erosion in mountainous areas especially on lateritic soils. Frequent and intense precipitation events(More)
In this paper, we describe a new technique for the automatic orientation of bedding in drill core from digital images. Images are planar pictures of the drill core, and we show that it is possible to determine layer orientation without rotating the core on the full circumference. More precisely, we show that angle information can be extracted by applying(More)
Digital signal processing is commonly used in Geophysics. Methods combining core sample physical property measurements with image analysis are beginning to emerge. In this paper, we describe a digital processing method applied directly to core sample images. Our approach uses a number of time-frequency and scale-frequency transformations as well as(More)
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