¥ Different types of numbers can be stored
in datasets
H 8 bit bytes (e.g.,
from grayscale photos)
H 16 bit short integers (e.g., from MRI scanners)
o Each sub-brick may also have a floating point scale factor a attached, so that ÒtrueÓ value in each voxel is actually a×(value in dataset file)
H 32 bit floats (e.g., calculated values; lets you avoid the a)
H 24 bit RGB color triples (e.g., JPEGs from your digital camera!)
H 64 bit complex numbers (e.g., for the physicists in the room)
¥ Different sub-bricks are allowed to have
different numeric types
H But this is not
recommended
H Will occur if you ÒcatenateÓ two
dissimilar datasets together (e.g., using 3dTcat
or 3dbucket commands)
oPrograms will display a warning to
the screen if you try this