all files / src/imageLoader/wadouri/metaData/ getLUTs.js

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18×
18×
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
function getLUT (pixelRepresentation, lutDataSet) {
  let numLUTEntries = lutDataSet.uint16('x00283002', 0);
 
  if (numLUTEntries === 0) {
    numLUTEntries = 65535;
  }
  let firstValueMapped = 0;
 
  if (pixelRepresentation === 0) {
    firstValueMapped = lutDataSet.uint16('x00283002', 1);
  } else {
    firstValueMapped = lutDataSet.int16('x00283002', 1);
  }
  const numBitsPerEntry = lutDataSet.uint16('x00283002', 2);
  // console.log('LUT(', numLUTEntries, ',', firstValueMapped, ',', numBitsPerEntry, ')');
  const lut = {
    id: '1',
    firstValueMapped,
    numBitsPerEntry,
    lut: []
  };
 
  // console.log("minValue=", minValue, "; maxValue=", maxValue);
  for (let i = 0; i < numLUTEntries; i++) {
    if (pixelRepresentation === 0) {
      lut.lut[i] = lutDataSet.uint16('x00283006', i);
    } else {
      lut.lut[i] = lutDataSet.int16('x00283006', i);
    }
  }
 
  return lut;
}
 
 
function getLUTs (pixelRepresentation, lutSequence) {
  Eif (!lutSequence || !lutSequence.items.length) {
    return;
  }
  const luts = [];
 
  for (let i = 0; i < lutSequence.items.length; i++) {
    const lutDataSet = lutSequence.items[i].dataSet;
    const lut = getLUT(pixelRepresentation, lutDataSet);
 
    if (lut) {
      luts.push(lut);
    }
  }
 
  return luts;
}
 
export default getLUTs;