Strange outcome image

[RockCWRU]

Hello,

I am a new user trying to get a grasp of Elastix. I have read the manual and was trying to run a very simple registration just to get started. For that reason, I created two very simple images to register (a red triangle and the same triangle slightly rotated) and set up my parameter file mainly based on what I read in the manual:

(Registration "MultiResolutionRegistration")
(Metric "AdvancedMattesMutualInformation")
(ImageSampler "RandomCoordinate")
(NewSamplesEveryIteration "true") //sampler related metric, discussed in 5.3.3 of manual
(Interpolator "LinearInterpolator")
(ResampleInterpolator "FinalBSplineInterpolator")
(Resampler "DefaultResampler")
(FinalBSplineInterpolationOrder 3)
(Transform "EulerTransform")
(AutomaticScalesEstimation "true")
(Optimizer "StandardGradientDescent")
(FixedImagePyramid "FixedSmoothingImagePyramid")
(MovingImagePyramid "MovingSmoothingImagePyramid")

And ran a basic command in command line:

elastix -f t1.tif -m t2.tif -out D:\elastixtest -p parameters.txt

This runs, but the output file .raw and .mhd files are very pixellated, jagged black and white abstract images. I have tried altering my parameters and using different images but am not familiar enough with Elastix to know what I am doing wrong. I would be very grateful for some advice!

Thank you,
Rock