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Ra_bn converts between RADIANCE and Barneyscan native
RGB image files. Since Barneyscan images are stored in three
files, one for each color component, only the root file name
is given and the program appends the suffixes
"red", "grn" and "blu". The
-g option specifies the exponent used in gamma
correction; the default value is 2.0. An exponent of 1.0
turns gamma correction off. The -e option specifies
an exposure compensation in f-stops (powers of two). Only
integer stops are allowed, for efficiency. The -r
option invokes a reverse conversion, from a Barneyscan image
to a RADIANCE picture. |
