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interimage:attributes_description [2010/06/23 16:44] tkorting |
interimage:attributes_description [2010/06/23 17:08] hermann |
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| * **contiguity**: Contiguity index assesses the spatial connectedness of pixels within a polygon to provide an index of boundary configuration. | * **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. | * **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. | + | * **angle**: The main angle of a polygon. It is obtained by calculating the best elliptic fit, and the angle of the biggest 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. | * **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. | + | * **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 t closest to 1 is this attribute, the most similar to a rectangle the polygon is. |
| * **circleness**: It is calculated by the following equation: | * **circleness**: It is calculated by the following equation: | ||
| {{ :interimage:circle.png }} | {{ :interimage:circle.png }} | ||
