public void FromImagePixelValueTags_ValidSignedInput_CorrectOutput(
ushort bitsAllocated,
ushort bitsStored,
double rescaleSlope,
double rescaleIntercept,
short smallestImagePixelValue,
short largestImagePixelValue,
string voiLutFunction,
double expectedWindowWidth,
double expectedWindowCenter)
{
var dataset = new DicomDataset(
new DicomCodeString(DicomTag.PhotometricInterpretation, "MONOCHROME1"),
new DicomUnsignedShort(DicomTag.BitsAllocated, bitsAllocated),
new DicomUnsignedShort(DicomTag.BitsStored, bitsStored),
new DicomUnsignedShort(DicomTag.PixelRepresentation, 1),
new DicomDecimalString(DicomTag.RescaleSlope, (decimal)rescaleSlope),
new DicomDecimalString(DicomTag.RescaleIntercept, (decimal)rescaleIntercept),
new DicomSignedShort(DicomTag.SmallestImagePixelValue, smallestImagePixelValue),
new DicomSignedShort(DicomTag.LargestImagePixelValue, largestImagePixelValue),
new DicomCodeString(DicomTag.VOILUTFunction, voiLutFunction));
var actual = GrayscaleRenderOptions.FromImagePixelValueTags(dataset);
Assert.Equal(expectedWindowWidth, actual.WindowWidth);
Assert.Equal(expectedWindowCenter, actual.WindowCenter);
}
public void FromDataset_PixelLimits_ReturnsSameAsFromImagePixelValueTags(
ushort bitsAllocated,
ushort bitsStored,
double rescaleSlope,
double rescaleIntercept,
short smallestImagePixelValue,
short largestImagePixelValue,
string voiLutFunction,
double expectedWindowWidth,
double expectedWindowCenter)
{
var dataset = new DicomDataset(
new DicomUnsignedShort(DicomTag.BitsAllocated, bitsAllocated),
new DicomUnsignedShort(DicomTag.BitsStored, bitsStored),
new DicomUnsignedShort(DicomTag.PixelRepresentation, 1),
new DicomDecimalString(DicomTag.RescaleSlope, (decimal)rescaleSlope),
new DicomDecimalString(DicomTag.RescaleIntercept, (decimal)rescaleIntercept),
new DicomSignedShort(DicomTag.SmallestImagePixelValue, smallestImagePixelValue),
new DicomSignedShort(DicomTag.LargestImagePixelValue, largestImagePixelValue),
new DicomCodeString(DicomTag.VOILUTFunction, voiLutFunction));
var expected = GrayscaleRenderOptions.FromImagePixelValueTags(dataset);
var actual = GrayscaleRenderOptions.FromDataset(dataset);
Assert.Equal(expected.WindowWidth, actual.WindowWidth);
Assert.Equal(expected.WindowCenter, actual.WindowCenter);
}
public void FromImagePixelValueTags_SmallestGreaterThanLargest_Throws()
{
var dataset = new DicomDataset(
new DicomUnsignedShort(DicomTag.BitsAllocated, 8),
new DicomUnsignedShort(DicomTag.BitsStored, 8),
new DicomUnsignedShort(DicomTag.PixelRepresentation, 0),
new DicomDecimalString(DicomTag.RescaleSlope, (decimal)1),
new DicomDecimalString(DicomTag.RescaleIntercept, (decimal)0),
new DicomUnsignedShort(DicomTag.SmallestImagePixelValue, 180),
new DicomUnsignedShort(DicomTag.LargestImagePixelValue, 90),
new DicomCodeString(DicomTag.VOILUTFunction, "LINEAR"));
Assert.Throws <DicomImagingException>(() => GrayscaleRenderOptions.FromImagePixelValueTags(dataset));
}
