Added tests for register

brainglobe_registration/elastix/register.py

@@ -231,14 +231,15 @@ def invert_transformation(
         0, "InitialTransformParameterFileName", "NoInitialTransform"
     )
 
-    file_names = [
-        f"{output_directory}/InverseTransformParameters.{i}.txt"
-        for i in range(len(parameter_list))
-    ]
+    if output_directory:
+        file_names = [
+            f"{output_directory}/InverseTransformParameters.{i}.txt"
+            for i in range(len(parameter_list))
+        ]
 
-    itk.ParameterObject.WriteParameterFiles(
-        result_transform_parameters, file_names
-    )
+        itk.ParameterObject.WriteParameterFiles(
+            result_transform_parameters, file_names
+        )
 
     return (
         np.asarray(result_image),

tests/test_images/non_linear/InverseTransformParameters.0.txt

@@ -0,0 +1,23 @@
+(CenterOfRotationPoint 240.40754485287607 163.18008610862196)
+(CompressResultImage "false")
+(DefaultPixelValue 0)
+(Direction 1 0 0 1)
+(FinalBSplineInterpolationOrder 3)
+(FixedImageDimension 2)
+(FixedInternalImagePixelType "float")
+(HowToCombineTransforms "Compose")
+(Index 0 0)
+(InitialTransformParameterFileName "NoInitialTransform")
+(MovingImageDimension 2)
+(MovingInternalImagePixelType "float")
+(NumberOfParameters 6)
+(Origin 0 0)
+(ResampleInterpolator "FinalBSplineInterpolator")
+(Resampler "DefaultResampler")
+(ResultImageFormat "tiff")
+(ResultImagePixelType "float")
+(Size 456 320)
+(Spacing 1 1)
+(Transform "AffineTransform")
+(TransformParameters 1.0003697638354456 -0.04720730937898214 0.06533968019388159 1.0267319116501339 -15.23350046785094 0.9448156292068727)
+(UseDirectionCosines "true")

tests/test_images/non_linear/InverseTransformParameters.1.txt

@@ -0,0 +1,29 @@
+(BSplineTransformSplineOrder 3)
+(CompressResultImage "false")
+(DefaultPixelValue 0)
+(Direction 1 0 0 1)
+(FinalBSplineInterpolationOrder 3)
+(FixedImageDimension 2)
+(FixedInternalImagePixelType "float")
+(GridDirection 1 0 0 1)
+(GridIndex 0 0)
+(GridOrigin -46.03680121839908 -45.021863372250095)
+(GridSize 22 16)
+(GridSpacing 25.716511144883096 27.444301597872055)
+(HowToCombineTransforms "Compose")
+(Index 0 0)
+(InitialTransformParameterFileName "/home/igor/test_out/InverseTransformParameters.0.txt")
+(MovingImageDimension 2)
+(MovingInternalImagePixelType "float")
+(NumberOfParameters 704)
+(Origin 0 0)
+(ResampleInterpolator "FinalBSplineInterpolator")
+(Resampler "DefaultResampler")
+(ResultImageFormat "tiff")
+(ResultImagePixelType "float")
+(Size 456 320)
+(Spacing 1 1)
+(Transform "BSplineTransform")
+(TransformParameters 0.5000100424426959 -0.47987149005012797 -1.3979804495456587 -2.8547277956309274 -4.5502241570579836 -6.059585364909818 -7.345999446420355 -8.946549369730024 -10.606268951868143 -11.1473965548737 -10.473698357987816 -9.415017542513622 -8.436649390149721 -8.017177574431779 -7.993555178587254 -7.350476373742639 -5.961790276867514 -4.434867063131683 -3.1091942961999757 -2.280643713398335 -2.0583715592244167 -1.1995939021094169 1.8522022127115187 0.33609045376416585 -1.3932698867152906 -3.6965674157128263 -6.412780676497511 -10.66529347781894 -14.782795537381817 -12.790197725097176 -5.940170331955437 -3.1317326256694775 -5.174088362809618 -4.956453148031578 -2.983307510400865 0.20741862287523224 3.3462638534576588 3.8155866442435245 2.581386956676334 0.7966989685477729 -0.9726982644486744 -1.7534754911149504 -1.5653574807823725 -0.9021341254235464 2.3283262241070766 0.9354240006363644 -0.9439919392174879 -3.5673528771212273 -7.084032212408747 -11.879611324984527 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+(UseCyclicTransform "false")
+(UseDirectionCosines "true")

tests/test_images/non_linear/TransformParameters.0.txt

@@ -0,0 +1,23 @@
+(CenterOfRotationPoint 213.5 158.5)
+(CompressResultImage "false")
+(DefaultPixelValue 0)
+(Direction 1 0 0 1)
+(FinalBSplineInterpolationOrder 3)
+(FixedImageDimension 2)
+(FixedInternalImagePixelType "float")
+(HowToCombineTransforms "Compose")
+(Index 0 0)
+(InitialTransformParameterFileName "NoInitialTransform")
+(MovingImageDimension 2)
+(MovingInternalImagePixelType "float")
+(NumberOfParameters 6)
+(Origin 0 0)
+(ResampleInterpolator "FinalBSplineInterpolator")
+(Resampler "DefaultResampler")
+(ResultImageFormat "tiff")
+(ResultImagePixelType "float")
+(Size 428 318)
+(Spacing 1 1)
+(Transform "AffineTransform")
+(TransformParameters 0.9961694613937621 0.05137285130530663 -0.05021136724642646 0.9924908378555806 15.810583591577414 2.1548954657311192)
+(UseDirectionCosines "true")