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Image
Image files contain 2-dimensional arrays that store 4-byte floating
point values. Images files can be either real or complex-valued.
Typically, all images are real-valued except for images that have been
processed by Fourier transforms. As you might expect,
complex-valued images are twice the size of real-valued images
since both a real and imaginary component need to be stored. When
complex-valued images are viewed on the screen, only the real
component is displayed.
Images files can store any number of text labels. CTSim uses
these labels for recording history information regarding
the creation and modifications of images.