raw2tiff
create a TIFF file from a raw data
see also :
pal2rgb - tiffinfo - tiffcp - tiffmedian
Synopsis
raw2tiff
[ options ] input.raw output.tif
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description
raw2tiff
converts a raw byte sequence into TIFF. By
default, the TIFF image is created with data
samples packed (PlanarConfiguration=1), compressed
with the PackBits algorithm (Compression=32773), and
with each strip no more than 8 kilobytes. These
characteristics can overridden, or explicitly specified with
the options described below.
options
-H
number
size of input image file header
in bytes (0 by default). This amount of data just will be
skipped from the start of file while reading.
-w
number
width of input image in pixels
(can be guessed, see GUESSING THE IMAGE
GEOMETRY below).
-l
number
length of input image in lines
(can be guessed, see GUESSING THE IMAGE
GEOMETRY below).
-b
number
number of bands in input image
(1 by default).
-d
data_type
type of samples in input image,
where data_type may be:
byte
8-bit unsigned integer (default),
short
16-bit unsigned integer,
long
32-bit unsigned integer,
sbyte
8-bit signed integer,
sshort
16-bit signed integer,
slong
32-bit signed integer,
float
32-bit IEEE floating point,
double
64-bit IEEE floating point.
-i
config
type of samples interleaving in
input image, where config may be:
pixel
pixel interleaved data (default),
band
band interleaved data.
-p
photo
photometric interpretation
(color space) of the input image, where photo may
be:
miniswhite
white color represented with 0 value,
minisblack
black color represented with 0 value (default),
rgb
image has RGB color model,
cmyk
image has CMYK (separated) color model,
ycbcr
image has YCbCr color model,
cielab
image has CIE L*a*b color model,
icclab
image has ICC L*a*b color model,
itulab
image has ITU L*a*b color model.
-s
swap bytes fetched from the input file.
-L
input data has LSB2MSB bit order (default).
-M
input data has MSB2LSB bit order.
-c
Specify a compression scheme to use when writing image
data: -c none for no compression, -c
packbits for the PackBits compression algorithm (the
default), -c jpeg for the baseline JPEG
compression algorithm, -c zip for the Deflate
compression algorithm, and -c lzw for
Lempel-Ziv & Welch.
-r
number
Write data with a specified
number of rows per strip; by default the number of
rows/strip is selected so that each strip is approximately 8
kilobytes.
guessing the image geometry
raw2tiff can guess image width and height in case one or
both of these parameters are not specified. If you omit one of
those parameters, the complementary one will be calculated based
on the file size (taking into account header size, number of
bands and data type). If you omit both parameters, the
statistical approach will be used. Utility will compute
correlation coefficient between two lines at the image center
using several appropriate line sizes and the highest absolute
value of the coefficient will indicate the right line size. That
is why you should be cautious with the very large images, because
guessing process may take a while (depending on your system
performance). Of course, the utility can’t guess the header size,
number of bands and data type, so it should be specified
manually. If you don’t know anything about your image, just try
with the several combinations of those options.
There is no magic, it is just a mathematical statistics, so it
can be wrong in some cases. But for most ordinary images guessing
method will work fine.
see also
pal2rgb ,
tiffinfo , tiffcp , tiffmedian ,
libtiff
Libtiff library
home page: http://www.remotesensing.org/libtiff/