Images stored in the DICOM format have a meta-data dictionary associated with them, which is populated with the DICOM tags. We look at DICOM images as an example illustrating this difference. The primary difference being that the object oriented approach provides more control while the procedural interface is more convenient. The toolkit provides both an object oriented and a procedural interface. SimpleITK can read and write images stored in a single file, or a set of files (e.g. To address this issue you can either specify the appropriate pixel type when reading or creating the image, or use the Cast function. The primary example is the registration framework which works with sitkFloat32 or sitkFloat64. Some filters only work with images with a specific pixel type. There is also sitkUnknown, which is used for undefined or erroneous pixel ID's. Multi-component of unsigned 64 bit integer Multi-component of unsigned 32 bit integer Multi-component of unsigned 16 bit integer Multi-component of unsigned 8 bit integer The following is a table of the enumerated list. The pixel type is represented as an enumerated type. A common issue with resampling resulting in an all black image is due to (a) incorrect specification of theĭesired output image's spatial domain (its meta-data) or (b) the use of the inverse of the transformation mapping from the output spatial domain to the resampled image.Data transfer to/from numpy: GetArrayFromImage (copy), GetArrayViewFromImage (immutable), GetImageFromArray (copy) + set the meta-data yourself.Image initialization: user specified pixel type, user specified dimensionality (2,3), origin at zero, unit spacing in all dimensions and identity direction cosine matrix, intensities set to zero.CT), patient name, and information with respect to the image acquisition. This supplemental information often includes the image modality (e.g. Computing the physical coordinates from image indexes requires all four components.Īn image may contain a meta-data dictionary. These attributes are the image's meta-data. Direction cosine matrix (axis directions in physical space).Spacing (unknown consistent units: nm, mm, m, km.).Images occupy a region in physical space which is defined by:
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