as = store images as is, e.g. without changing the compression.
is = store images as is, e.g. without changing the compression.
un = uncompress NKI and/or JPEG compressed images
n1 = fast NKI private loss-less compression mode 1      (50%)
n2 = as n1 but with CRC check for errors  (50%)
n3 = fast NKI private loss-less compression mode 3     (40%)
n4 = as n3 but with CRC check for errors  (40%)
j1 = JPEGLossless  (33%)
j2 = JPEGLosslessNH14 (33%)
j3 = JPEG baseline 1 (8 bit) lossy (8%)
j4 = JPEGExtended2and4  lossy (15%)
j5 = JPEGSpectralNH6and8  lossy (15%)
j6 = JPEGFulllNH10and12  lossy (14%)
jk = Lossless JPEG2000  (variable)
jl = Lossy JPEG2000  (variable)
nj = Highest NKI mode; but leaves JPEG as is (variable)
uj = Uncompressed; but leaves JPEG as is (variable)
k1 = Downsize image>1024 pixels wide/high to 1024 (variable)
k2 = Downsize image>512 pixels wide/high to 512 (variable)
k4 = Downsize image>256 pixels wide/high to 256 (variable)
k8 = Downsize image>128 pixels wide/high to 128 (variable)
ka = Downsize image>64 pixels wide/high to 64 (variable)
kb = Downsize image>32 pixels wide/high to 32 (variable)
kc = Downsize image>16 pixels wide/high to 16 (variable)
s0  = Run CompressionConverter0                                       (n/a)
..
s9  = Run CompressionConverter9                                       (n/a)