Descriptor Proposed JFMR

File:DivergenceGradient.png > Descriptor Proposed JFMR > ROIs Relevants JFMR > Descriptor Proposed JFMR

Definition

Given a vector field $\vec{V}=(u,v)$, where $u$ and $v$ represent the components of the winds of each of the annotations.

The vector field representation allow to observe the behavior of the winds in a determined region, these configurations are:

• Vortex
• Confluence
• Difluence
• Saddle Point

The meteorologists annotated the different configurations that it can present in a period of time and a level determined, this process was done with an annotations tool that allow to select this configurations.

Model Mathematic

Given a vector field $\vec{V}$, a way to classify this configurations is through the use of phase portrait, this method is used in the dynamic system to understand the behavior of functions of 2 or more variables. this method consists in to construct a equation system and to calculate the determinant and the trace, in computer vision is used in the detection corner, mammography and others