private static void TestVolume(bool signed, VolumeFunction f, IEnumerable <IVolumeSlicerParams> slicerParams, string testName, ImageKernelFunction imageKernel, VolumeKernelFunction volumeKernel) { const int FULL_SCALE = 65535; VolumeFunction normalizedFunction = f.Normalize(100); using (Volume volume = normalizedFunction.CreateVolume(100, signed)) { float offset = signed ? -32768 : 0; foreach (IVolumeSlicerParams slicing in slicerParams) { List <double> list = new List <double>(); using (VolumeSlicer slicer = new VolumeSlicer(volume, slicing, DicomUid.GenerateUid().UID)) { foreach (ISopDataSource slice in slicer.CreateSlices()) { using (ImageSop imageSop = new ImageSop(slice)) { foreach (IPresentationImage image in PresentationImageFactory.Create(imageSop)) { IImageSopProvider imageSopProvider = (IImageSopProvider)image; IImageGraphicProvider imageGraphicProvider = (IImageGraphicProvider)image; DicomImagePlane dip = DicomImagePlane.FromImage(image); for (int y = 1; y < imageSopProvider.Frame.Rows - 1; y++) { for (int x = 1; x < imageSopProvider.Frame.Columns - 1; x++) { // pixels on the extreme sides of the volume tend to have more interpolation error due to MPR padding values Vector3D vector = dip.ConvertToPatient(new PointF(x, y)); // +new Vector3D(-0.5f, -0.5f, 0); if (Between(vector.X, 1, 98) && Between(vector.Y, 1, 98) && Between(vector.Z, 1, 98)) { float expected = volumeKernel.Invoke(normalizedFunction, vector.X, vector.Y, vector.Z) + offset; float actual = imageKernel.Invoke(imageGraphicProvider.ImageGraphic.PixelData, x, y); list.Add(Math.Abs(expected - actual)); } } } image.Dispose(); } } slice.Dispose(); } } Statistics stats = new Statistics(list); Trace.WriteLine(string.Format("Testing {0}", testName)); Trace.WriteLine(string.Format("\tFunction/Slicing: {0} / {1}", normalizedFunction.Name, slicing.Description)); Trace.WriteLine(string.Format("\t Pixel Rep: {0}", signed ? "signed" : "unsigned")); Trace.WriteLine(string.Format("\t Voxels Compared: {0}", list.Count)); Trace.WriteLine(string.Format("\t Mean Delta: {0:f2} ({1:p2} of full scale)", stats.Mean, stats.Mean / FULL_SCALE)); Trace.WriteLine(string.Format("\t StdDev Delta: {0:f2} ({1:p2} of full scale)", stats.StandardDeviation, stats.StandardDeviation / FULL_SCALE)); Assert.Less(stats.Mean, FULL_SCALE * 0.05, "Mean delta exceeds 5% of full scale ({0})", FULL_SCALE); Assert.Less(stats.StandardDeviation, FULL_SCALE * 0.05, "StdDev delta exceeds 5% of full scale ({0})", FULL_SCALE); } } }
private static void TestVolume(bool signed, VolumeFunction f, IEnumerable<IVolumeSlicerParams> slicerParams, string testName, ImageKernelFunction imageKernel, VolumeKernelFunction volumeKernel) { const int FULL_SCALE = 65535; VolumeFunction normalizedFunction = f.Normalize(100); using (Volume volume = normalizedFunction.CreateVolume(100, signed)) { float offset = signed ? -32768 : 0; foreach (IVolumeSlicerParams slicing in slicerParams) { List<double> list = new List<double>(); using (VolumeSlicer slicer = new VolumeSlicer(volume, slicing, DicomUid.GenerateUid().UID)) { foreach (ISopDataSource slice in slicer.CreateSlices()) { using (ImageSop imageSop = new ImageSop(slice)) { foreach (IPresentationImage image in PresentationImageFactory.Create(imageSop)) { IImageSopProvider imageSopProvider = (IImageSopProvider) image; IImageGraphicProvider imageGraphicProvider = (IImageGraphicProvider) image; DicomImagePlane dip = DicomImagePlane.FromImage(image); for (int y = 1; y < imageSopProvider.Frame.Rows - 1; y++) { for (int x = 1; x < imageSopProvider.Frame.Columns - 1; x++) { // pixels on the extreme sides of the volume tend to have more interpolation error due to MPR padding values Vector3D vector = dip.ConvertToPatient(new PointF(x, y)); // +new Vector3D(-0.5f, -0.5f, 0); if (Between(vector.X, 1, 98) && Between(vector.Y, 1, 98) && Between(vector.Z, 1, 98)) { float expected = volumeKernel.Invoke(normalizedFunction, vector.X, vector.Y, vector.Z) + offset; float actual = imageKernel.Invoke(imageGraphicProvider.ImageGraphic.PixelData, x, y); list.Add(Math.Abs(expected - actual)); } } } image.Dispose(); } } slice.Dispose(); } } Statistics stats = new Statistics(list); Trace.WriteLine(string.Format("Testing {0}", testName)); Trace.WriteLine(string.Format("\tFunction/Slicing: {0} / {1}", normalizedFunction.Name, slicing.Description)); Trace.WriteLine(string.Format("\t Pixel Rep: {0}", signed ? "signed" : "unsigned")); Trace.WriteLine(string.Format("\t Voxels Compared: {0}", list.Count)); Trace.WriteLine(string.Format("\t Mean Delta: {0:f2} ({1:p2} of full scale)", stats.Mean, stats.Mean/FULL_SCALE)); Trace.WriteLine(string.Format("\t StdDev Delta: {0:f2} ({1:p2} of full scale)", stats.StandardDeviation, stats.StandardDeviation/FULL_SCALE)); Assert.Less(stats.Mean, FULL_SCALE*0.05, "Mean delta exceeds 5% of full scale ({0})", FULL_SCALE); Assert.Less(stats.StandardDeviation, FULL_SCALE*0.05, "StdDev delta exceeds 5% of full scale ({0})", FULL_SCALE); } } }
public ISopDataSource[] CreateSops(bool signed, Modality modality, Vector3D voxelSpacing, Vector3D sliceAxisX, Vector3D sliceAxisY, Vector3D sliceAxisZ) { var seriesInstanceUid = DicomUid.GenerateUid().UID; var slicerParams = new VolumeSlicerParams(sliceAxisX, sliceAxisY, sliceAxisZ); var volume = CreateVolume(signed, modality, voxelSpacing); using (VolumeSlicer slicer = new VolumeSlicer(volume, slicerParams, seriesInstanceUid)) { return(new List <ISopDataSource>(slicer.CreateSlices()).ToArray()); } }
protected static void ValidateVolumeSlicePoints(Volumes.Volume volume, IVolumeSlicerParams slicerParams, IList <KnownSample> expectedPoints, double xAxialGantryTilt, double yAxialGantryTilt, bool gantryTiltInDegrees) { if (gantryTiltInDegrees) { xAxialGantryTilt *= Math.PI / 180; yAxialGantryTilt *= Math.PI / 180; } Trace.WriteLine(string.Format("Using slice plane: {0}", slicerParams.Description)); using (VolumeSlicer slicer = new VolumeSlicer(volume, slicerParams)) { foreach (ISopDataSource slice in slicer.CreateSliceSops()) { using (ImageSop imageSop = new ImageSop(slice)) { foreach (IPresentationImage image in PresentationImageFactory.Create(imageSop)) { IImageGraphicProvider imageGraphicProvider = (IImageGraphicProvider)image; DicomImagePlane dip = DicomImagePlane.FromImage(image); foreach (KnownSample sample in expectedPoints) { Vector3D patientPoint = sample.Point; if (xAxialGantryTilt != 0 && yAxialGantryTilt == 0) { float cos = (float)Math.Cos(xAxialGantryTilt); float sin = (float)Math.Sin(xAxialGantryTilt); patientPoint = new Vector3D(patientPoint.X, patientPoint.Y * cos + (xAxialGantryTilt > 0 ? 100 * sin : 0), patientPoint.Z / cos - patientPoint.Y * sin - (xAxialGantryTilt > 0 ? 100 * sin * sin / cos : 0)); } else if (yAxialGantryTilt != 0) { Assert.Fail("Unit test not designed to work with gantry tilts about Y (i.e. slew)"); } Vector3D slicedPoint = dip.ConvertToImagePlane(patientPoint); if (slicedPoint.Z > -0.5 && slicedPoint.Z < 0.5) { int actual = imageGraphicProvider.ImageGraphic.PixelData.GetPixel((int)slicedPoint.X, (int)slicedPoint.Y); Trace.WriteLine(string.Format("Sample {0} @{1} (SLICE: {2}; PATIENT: {3})", actual, FormatVector(sample.Point), FormatVector(slicedPoint), FormatVector(patientPoint))); Assert.AreEqual(sample.Value, actual, "Wrong colour sample @{0}", sample.Point); } } image.Dispose(); } } slice.Dispose(); } } }
protected static void ValidateVolumeSlicePoints(Volumes.Volume volume, IVolumeSlicerParams slicerParams, IList<KnownSample> expectedPoints, double xAxialGantryTilt, double yAxialGantryTilt, bool gantryTiltInDegrees) { if (gantryTiltInDegrees) { xAxialGantryTilt *= Math.PI/180; yAxialGantryTilt *= Math.PI/180; } Trace.WriteLine(string.Format("Using slice plane: {0}", slicerParams.Description)); using (VolumeSlicer slicer = new VolumeSlicer(volume, slicerParams)) { foreach (ISopDataSource slice in slicer.CreateSliceSops()) { using (ImageSop imageSop = new ImageSop(slice)) { foreach (IPresentationImage image in PresentationImageFactory.Create(imageSop)) { IImageGraphicProvider imageGraphicProvider = (IImageGraphicProvider) image; DicomImagePlane dip = DicomImagePlane.FromImage(image); foreach (KnownSample sample in expectedPoints) { Vector3D patientPoint = sample.Point; if (xAxialGantryTilt != 0 && yAxialGantryTilt == 0) { float cos = (float) Math.Cos(xAxialGantryTilt); float sin = (float) Math.Sin(xAxialGantryTilt); patientPoint = new Vector3D(patientPoint.X, patientPoint.Y*cos + (xAxialGantryTilt > 0 ? 100*sin : 0), patientPoint.Z/cos - patientPoint.Y*sin - (xAxialGantryTilt > 0 ? 100*sin*sin/cos : 0)); } else if (yAxialGantryTilt != 0) { Assert.Fail("Unit test not designed to work with gantry tilts about Y (i.e. slew)"); } Vector3D slicedPoint = dip.ConvertToImagePlane(patientPoint); if (slicedPoint.Z > -0.5 && slicedPoint.Z < 0.5) { int actual = imageGraphicProvider.ImageGraphic.PixelData.GetPixel((int) slicedPoint.X, (int) slicedPoint.Y); Trace.WriteLine(string.Format("Sample {0} @{1} (SLICE: {2}; PATIENT: {3})", actual, FormatVector(sample.Point), FormatVector(slicedPoint), FormatVector(patientPoint))); Assert.AreEqual(sample.Value, actual, "Wrong colour sample @{0}", sample.Point); } } image.Dispose(); } } slice.Dispose(); } } }