@Override
public void map() {
// more detailed documentation of the binary arithmetic can be found in
// ArrayImgXYByteProjector
double minCopy = min;
int offset = 0;
final long[] tmpPos = position.clone();
tmpPos[0] = 0;
tmpPos[1] = 0;
offset = (int) IntervalIndexer.positionToIndex(tmpPos, dims);
// copy the selected part of the source array (e.g. a xy plane at time t
// in a video) into the target array.
System.arraycopy(sourceArray, offset, targetArray, 0, targetArray.length);
if (isSigned) {
for (int i = 0; i < targetArray.length; i++) {
// Short.MIN => 0 && Short.MAX => 65535 (2^16 - 1) => unsigned
// short
targetArray[i] = (short) (targetArray[i] - 0x8000);
}
// old => unsigned short minimum
minCopy += 0x8000;
}
if (normalizationFactor != 1) {
for (int i = 0; i < targetArray.length; i++) {
// normalizedValue = (oldValue - min) * normalizationFactor
// clamped to 0 .. 65535
targetArray[i] =
(short)
Math.min(
65535,
Math.max(
0,
(Math.round(((targetArray[i] & 0xFFFF) - minCopy) * normalizationFactor))));
}
}
}
/**
* compute the index in the underlying flat array of this cell which corresponds to a local
* position (i.e., relative to the origin of this cell).
*
* @param position a local position
* @return corresponding index
*/
public int localPositionToIndex(final long[] position) {
return IntervalIndexer.positionToIndex(position, dimensions);
}
