Features
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| − | == Features == | + | Several Feature types are defined these include: |
| − | + | 1. Intrinsic Features | |
| − | + | 2. Associative Features | |
| + | == Intrinsic Features == | ||
| + | These features can be calculated with two input images (Data Image and Label Image). | ||
| + | They are most commonly used for blob-like regions, such as nuclei. | ||
| − | + | ===''Volume''=== | |
| − | + | Number of voxels in the object (Dirk) | |
| − | + | ===''Integrated Intensity''=== | |
| − | + | Sum of the intensities of all voxels in the object (Dirk) | |
| − | + | ===''Eccentricity''=== | |
| − | + | Ratio of the distance between the foci to the length of the major axis (2D?) (Dirk) | |
| − | + | ===''Elongation''=== | |
| − | + | Major axis length over minor axis length (2D?) (Dirk) | |
| − | + | ===''Orientation''=== | |
| − | + | Angle between major axis and origin (2D) (Dirk) | |
| − | + | ===''Bounding Box Volume''=== | |
| − | + | Number of voxels in bounding box of object (Dirk) | |
| − | + | ===''Sum''=== | |
| − | + | Same as integrated intensity (ITK statistics) | |
| − | + | ===''Mean''=== | |
| − | + | Average intensity of voxels in the object (ITK statistics) | |
| − | + | ===''Median''=== | |
| − | + | Middle intensity of voxels in the object (ITK statistics) | |
| − | + | ===''Minimum''=== | |
| − | + | Minimum intensity of voxels in the object (ITK statistics) | |
| − | + | ===''Maximum''=== | |
| − | + | Maximum intensity of voxels in the object (ITK statistics) | |
| − | + | ===''Sigma''=== | |
| − | + | Standard deviation of intensity of voxels in the object (ITK statistics) | |
| − | + | ===''Variance''=== | |
| − | + | Variance of intensity of voxels in the object (ITK statistics) | |
| + | ===''Radius Variation''=== | ||
| + | Standard deviation of distance from surface voxels to centroid (Isaac) | ||
| + | ===''Skew''=== | ||
| + | Skew of the normalized intensity histogram (Isaac) (See Supplement B2) | ||
| + | ===''Energy''=== | ||
| + | Energy of the normalized intensity histogram (Isaac) (See Supplement B2) | ||
| + | ===''Entropy''=== | ||
| + | Entropy of the normalized intensity histogram (Isaac) (See Supplement B2) | ||
| + | ===''Surface Gradient''=== | ||
| + | Average of surface gradients (Isaac) | ||
| + | ===''Interior Gradient''=== | ||
| + | Average of interior gradients (Isaac) | ||
| + | ===''Interior Intensity''=== | ||
| + | Average of interior intensities (Isaac) | ||
| + | ===''Surface Intensity''=== | ||
| + | Average of surface intensities (Isaac) | ||
| + | ===''Intensity Ratio''=== | ||
| + | Ratio of surface intensity to interior intensity (Isaac) | ||
| + | ===''Shared Boundary''=== | ||
| + | Ratio of surface area that touches another object to total surface area (Isaac) | ||
| + | ===''Surface Area''=== | ||
| + | Number of voxels on surface of the object (Isaac) | ||
| + | ===''Shape''=== | ||
| + | Ratio of surface voxels to total voxels - compactness or thinness of object (Isaac) (See Supplement B2) | ||
Revision as of 18:48, 24 March 2009
Several Feature types are defined these include: 1. Intrinsic Features 2. Associative Features
Intrinsic Features
These features can be calculated with two input images (Data Image and Label Image). They are most commonly used for blob-like regions, such as nuclei.
Volume
Number of voxels in the object (Dirk)
Integrated Intensity
Sum of the intensities of all voxels in the object (Dirk)
Eccentricity
Ratio of the distance between the foci to the length of the major axis (2D?) (Dirk)
Elongation
Major axis length over minor axis length (2D?) (Dirk)
Orientation
Angle between major axis and origin (2D) (Dirk)
Bounding Box Volume
Number of voxels in bounding box of object (Dirk)
Sum
Same as integrated intensity (ITK statistics)
Mean
Average intensity of voxels in the object (ITK statistics)
Median
Middle intensity of voxels in the object (ITK statistics)
Minimum
Minimum intensity of voxels in the object (ITK statistics)
Maximum
Maximum intensity of voxels in the object (ITK statistics)
Sigma
Standard deviation of intensity of voxels in the object (ITK statistics)
Variance
Variance of intensity of voxels in the object (ITK statistics)
Radius Variation
Standard deviation of distance from surface voxels to centroid (Isaac)
Skew
Skew of the normalized intensity histogram (Isaac) (See Supplement B2)
Energy
Energy of the normalized intensity histogram (Isaac) (See Supplement B2)
Entropy
Entropy of the normalized intensity histogram (Isaac) (See Supplement B2)
Surface Gradient
Average of surface gradients (Isaac)
Interior Gradient
Average of interior gradients (Isaac)
Interior Intensity
Average of interior intensities (Isaac)
Surface Intensity
Average of surface intensities (Isaac)
Intensity Ratio
Ratio of surface intensity to interior intensity (Isaac)
Ratio of surface area that touches another object to total surface area (Isaac)
Surface Area
Number of voxels on surface of the object (Isaac)
Shape
Ratio of surface voxels to total voxels - compactness or thinness of object (Isaac) (See Supplement B2)
