public void TestAdjustableDataVoiLut()
{
const int rngSeed = 0x0D924561;
const int firstMappedPixelValue = -5;
const int lastMappedPixelValue = 1243;
const double windowCenter = 12345;
const double windowWidth = 65536;
const int minOutputValue = int.MinValue;
const int maxOutputValue = int.MaxValue;
var lutData = LutTestHelper.GenerateRandomLutData(lastMappedPixelValue - firstMappedPixelValue + 1, rngSeed);
var dataVoiLut = new AdjustableDataLut(new SimpleDataLut(firstMappedPixelValue, lutData, minOutputValue, maxOutputValue, rngSeed.ToString("X8"), rngSeed.ToString("X8")));
var voiLut = (IBasicVoiLutLinear)dataVoiLut;
// do not perform exact floating point assertion, as the AdjustableDataLut function is very likely to produce floating point error
for (var n = 0; n < lutData.Length; ++n)
{
Assert.AreEqual(lutData[n], dataVoiLut[n + firstMappedPixelValue], 0.5, "AdjustableDataLut[@{0}]", n);
}
dataVoiLut.AssertLookupValues(-10, 2000);
voiLut.WindowCenter = windowCenter;
voiLut.WindowWidth = windowWidth;
for (var n = 0; n < lutData.Length; ++n)
{
const double centerLessHalf = windowCenter - 0.5;
const double windowLessOne = windowWidth - 1;
const double halfWidth = windowLessOne / 2;
const double outputRange = ((double)maxOutputValue - minOutputValue);
var input = lutData[n];
double expected;
if (input <= centerLessHalf - halfWidth)
{
expected = minOutputValue;
}
else if (input > centerLessHalf + halfWidth)
{
expected = maxOutputValue;
}
else
{
expected = ((input - centerLessHalf) / windowLessOne + 0.5) * outputRange + minOutputValue;
}
Assert.AreEqual(expected, dataVoiLut[n + firstMappedPixelValue], 0.5, "After Adjust - AdjustableDataLut[@{0}]", n);
}
dataVoiLut.AssertLookupValues(-10, 2000);
}
public void TestBasicDataVoiLut()
{
const int rngSeed = 0x0D924561;
const int firstMappedPixelValue = -5;
const int lastMappedPixelValue = 1243;
var lutData = LutTestHelper.GenerateRandomLutData(lastMappedPixelValue - firstMappedPixelValue + 1, rngSeed);
var dataVoiLut = new TestLut(lutData, firstMappedPixelValue, rngSeed.ToString("X8"));
var composableLut = (IComposableLut)dataVoiLut;
for (var n = 0; n < lutData.Length; ++n)
{
Assert.AreEqual(lutData[n], dataVoiLut[n + firstMappedPixelValue], "DataLut[@{0}]", n);
Assert.AreEqual(lutData[n], composableLut[n + firstMappedPixelValue], "IComposableLut[@{0}]", n);
}
dataVoiLut.AssertLookupValues(-10, 2000);
}