Linear feature detection in digital images is an important low-level operation in computer vision that has many applications. In remote sensing tasks, it can be used to extract roads, railroads, and rivers from satellite or low-resolution aerial images, which can be used for the capture or update of data for geographic information and navigation systems. In addition, it is useful in medical ima...

• Fine roots constitute a large and dynamic component of the carbon cycles of terrestrial ecosystems. The reported fivefold discrepancy in turnover estimates between median longevity (ML) from minirhizotrons and mean residence time (MRn using carbon isotopes may have global consequences. • Here, a root branch order-based model and a simulated factorial experiment were used to examine four sourc...

Phosphorus (P) availability in subtropical soils does not often meet the nutritional demand of native tree species such as ipê-roxo (Handroanthus heptaphyllus); therefore, it is necessary to supply P at planting. However, impact on root system growth remains unknown. The aim current study was investigate effect application morphology H. heptaphyllus plants over a 36-month period climate region....

Cheng, W.-X., Coleman, D.C. and Box, J.E., Jr., 1991. Measuring root turnover using the minirhizo° tron technique. Agric. Ecosystems Environ., 34: 261-267. Measurement of root turnover has been one of the most difficult problems in terrestrial ecosystem studies owing to the lack of an appropriate method. In this paper, a method for measuring intraseasonal root turnover is described. The recentl...

Direct observation of root growth in woody seedlings is possible using a ’minirhizotron’. Root growth in this device occurs almost exclusively at the interface between the substrate and the lower, transparent, rhizotron wall. This method provides a better picture of root morphology and development, but reduces a threedimensional root system to a plane. Root growth is generally observed every 2n...

We consider dynamic scenes consisting of moving points whose motion is constrained to happen in one of a pencil of planes. This is for example the case when rigid objects move independently, but on a common ground plane (each point moves in one of a pencil of planes parallel to the ground plane). We consider stereo pairs of the dynamic scene, taken by a moving stereo system, that allow to obtai...