FreeSurfaceDescriptor.java

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package theba.descriptors;

import theba.core.RegionDescriptor;
import theba.core.RegionMask;

public class FreeSurfaceDescriptor implements RegionDescriptor {

        public Object measure(RegionMask mask) {
                long surface = 0;
                for (int x = 0; x < mask.getWidth(); x++)
                        for (int y = 0; y < mask.getHeight(); y++)
                                for (int z = 0; z < mask.getDepth(); z++)
                                        if (mask.isSet(x, y, z)) {
                                                if (mask.getPixelAt(x + 1, y, z) == 0)
                                                        surface++;
                                                if (mask.getPixelAt(x - 1, y, z) == 0)
                                                        surface++;
                                                if (mask.getPixelAt(x, y + 1, z) == 0)
                                                        surface++;
                                                if (mask.getPixelAt(x, y - 1, z) == 0)
                                                        surface++;
                                                if (mask.getPixelAt(x, y, z + 1) == 0)
                                                        surface++;
                                                if (mask.getPixelAt(x + 1, y, z - 1) == 0)
                                                        surface++;
                                        }
                return surface;
        }

        public String getName() {
                return "Free Surface (3D)";
        }

        public String getAbout() {
                return "Counts each side of a border-voxel that is not part of this region \n This estimates the surface of this region";
        }

        public boolean does3D() {
                return true;
        }

        public boolean isNumeric() {
                return true;
        }

}