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| teem | / | unrrdu |
unu convert |
This makes available to nrrds the exact same rules of casting that apply to the basic scalar types in C. No attempt is made to clamp, scale, or otherwise map values. You can convert from and to any of the 10 scalar types.unu convert: Convert nrrd to another type (as if by per-value cast). This does not transform, scale, clamp, or intelligently quantize values; it just copies them from one type to another, which replicates exactly what you'd get in C when you assign from a variable of one type to another, or when you cast to a differet type. See also "unu quantize","unu 2op x", and "unu 3op clamp". Usage: unu convert -t <type> [-i <nin>] [-o <nout>] -t <type> = type to convert to -i <nin> = input nrrd -o <nout> = output nrrd (string); default: "-"
One use for this is handling data that comes from a plain text file. Nrrd treats numerical data from plain text files as arrays of floats, so if you have a text file containing values which you know are integers, then unu convert is a simple way to convert them to an integral type after they've been read in. Here's some numbers in text.txt:
And this reads the text file to produce a PGM image:194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 0 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 0 194 194 194 194 194 194 194 194 0 194 194 194 194 194 194 194 194 194 0 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 0 194 0 0 0 194 194 194 0 0 194 194 194 194 194 194 194 194 194 0 0 194 194 194 0 194 194 194 0 194 194 194 194 194 194 194 194 194 0 194 194 194 194 0 194 194 194 0 194 194 194 194 194 194 194 194 194 0 194 194 194 194 0 194 194 194 0 194 194 194 194 194 194 194 194 194 0 194 194 194 194 0 194 194 194 0 194 194 194 194 194 194 194 194 194 0 194 194 194 194 0 194 0 0 0 0 0 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194 194
unu convert -i text.txt -t uchar -o text.pgm
