Using a shape model (SM) is typical method to determine the phenological phases of crops with long-time-series satellite remote sensing data. The average AGDD-based (AAGDD-SM) takes temperature into account compared SM, however, commonly used daily not sufficient exact AGDD owing possibly significant changes in temperatures throughout day. In this paper, modified was proposed for better estimat...

Bottom-up segmentation methods merge similar neighboring regions according to a decision rule and a merging order. In this paper, we propose a contribution for each of these two points. Firstly, under statistical hypothesis of similarity, we provide an improved decision rule for region merging based on significance tests and the recent statistical inequality of McDiarmid. Secondly, we propose a...

In this paper techniques are described for the automated detection of solar Active Regions (ARs). AR detection is achieved using intensity thresholds and a region growing procedure. These procedures have been tested on full-disk solar images from the Meudon observatory for the months of April and July 2002 and compared with their manually generated synoptic maps. Comparisons were also made with...

In this paper, we present a task-specific segmentation method that incorporates semantic knowledge into datadriven segmentation process through different region merge scores. Starting from a simple region growing algorithm which results in over-segmented regions, we apply region merging method designed specifically for each task such as road extraction or vegetation area identification. Further...

We describe an Eikonal-based algorithm for computing dense oversegmentation of an image, often called superpixels. This oversegmentation respect local image boundaries while limiting undersegmentation. The proposed algorithm relies on a region growing scheme, where the potential map used is not xed and evolves during the di usion. Re nement steps are also proposed to enhance at low cost the rst...

For effective application of laser or X-ray CT scanned mesh models in design, analysis, and inspection etc, it is preferable that they are segmented into desirable regions as a pre-processing. Engineering parts are commonly covered with analytic surfaces, such as planes, cylinders, spheres, cones, and tori. Therefore, the portions of the part’s boundary where each can be represented by a type o...