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ijp-biop-run-macro/src/main/java/algorithms/Accumulator.java
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Accumulator.java
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package algorithms;
import net.imglib2.TwinCursor;
import net.imglib2.type.numeric.RealType;
/**
* A class allowing an easy accumulation of values visited by a
* TwinCursor. After instantiation the sum of channel one,
* channel two, products with them self and a product of both of
* them will be available. It additionally provides the possibility
* to subtract values from the data before the adding them to the
* sum.
*
* @author Johannes Schindelin and Tom Kazimiers
*/
public abstract class Accumulator<T extends RealType< T >> {
protected double x, y, xx, xy, yy;
protected int count;
/**
* The two values x and y from each cursor iteration to get
* summed up as single values and their combinations.
*/
public Accumulator(final TwinCursor<T> cursor) {
this(cursor, false, 0.0d, 0.0d);
}
/**
* The two values (x - xDiff) and (y - yDiff) from each cursor
* iteration to get summed up as single values and their combinations.
*/
public Accumulator(final TwinCursor<T> cursor, double xDiff, double yDiff) {
this(cursor, true, xDiff, yDiff);
}
protected Accumulator(final TwinCursor<T> cursor, boolean substract, double xDiff, double yDiff) {
while (cursor.hasNext()) {
cursor.fwd();
T type1 = cursor.getChannel1();
T type2 = cursor.getChannel2();
if (!accept(type1, type2))
continue;
double value1 = type1.getRealDouble();
double value2 = type2.getRealDouble();
if (substract) {
value1 -= xDiff;
value2 -= yDiff;
}
x += value1;
y += value2;
xx += value1 * value1;
xy += value1 * value2;
yy += value2 * value2;
count++;
}
}
public abstract boolean accept(T type1, T type2);
public double getX() {
return x;
}
public double getY() {
return y;
}
public double getXX() {
return xx;
}
public double getXY() {
return xy;
}
public double getYY() {
return yy;
}
public int getCount() {
return count;
}
}
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