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--- interimage:overview [2010/02/27 19:28] – tkorting
+++ interimage:overview [2010/06/24 19:12] (atual) – removed tkorting
@@ Linha 1: / Linha 1: @@
-======= Overview =======
-In this page we explain some InterIMAGE features, starting by the attributes which can be extracted using the decision rules.
-===== Attributes Description =====
-  * area: Returns the area of the given polygon, in number of pixels.
-  * bBoxArea: Returns the bounding box area of the given polygon, in number of pixels.
-  * perimeter: Returns the perimeter of the polygon, considering the amount of pixels in its border.
-  * fractalDimension: Returns the fractal dimension of a given polygon, which is calculated by the following equation:
-{{ :interimage:fractal.png }}
-Where P is the polygon perimeter and A is the area.
-  * perimeterAreaRatio: Calculates the ratio between the perimeter and the area of a polygon.
-  * compacity: Returns the compacity of a given polygon, which is calculated by the following equation:
-{{ :interimage:compacity.png }}
-Where P is the polygon perimeter and A is the area.
-  * density: The density of a polygon is calculated by the ratio between its area and its Radius (the maximum distance between the polygon centroid and all its vertices).
-  * length: The Length of a polygon is the height of its bounding box.
-  * width: The Width of a polygon is calculated by the width of its bounding box.
-  * contiguity: Contiguity index assesses the spatial connectedness of pixels within a polygon to provide an index of boundary configuration.
-  * gyrationRadius: This attribute equals the mean distance between each pixel in the polygon and the polygon centroid.
-  * angle: The main angle of a polygon. It is obtained by calculating the best elliptic fit, and the angle of the bigest radius of the ellipse corresponds to the polygon angle.
-  * ellipticFit: Finds the best ellipse which fits outside the polygon and returns the ratio between the polygon area and the ellipse area.
-  * squareness: This attribute fits the minimum rectangle outside the polygon and calculates the ratio between the polygon area and the area of this rectangle. The most close to 1 is this attribute, the most similar to a rectangle the polygon is.
-  * circleness: It is calculated by the following equation:
-{{ :interimage:circle.png }}
-Where A is the polygon area and R is the maximum distance between the polygon centroid and all its vertices.