F.2 Image files

Since images are regular arrays, the sizes of image files are easier to calculate. The images are stored as floating-point numbers, i.e., 32 bits per pixel, so the image file size in bytes is given by

4×    length(i)
where length(i) is the number of pixels on the ith axis. For example, a 128-channel cube with each plane a 256 × 256 image will require around 34 Mbytes of disk storage space. This may be increased a little due to the way in which the system allocates space for files.