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RAW2TIFF

NAME

SYNOPSIS

DESCRIPTION

OPTIONS

GUESSING THE IMAGE GEOMETRY

SEE ALSO

NAME

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raw2tiff − create a <small>TIFF</small> file from a

raw data

SYNOPSIS

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raw2tiff [ options ] input.raw

output.tif

DESCRIPTION

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raw2tiff converts a raw byte sequence into

<small>TIFF.</small> By default, the <small>TIFF</small>

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

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−H number

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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.

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−w number

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width of input image in pixels (can be guessed, see

<small>GUESSING THE IMAGE GEOMETRY</small>

below).

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−l number

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length of input image in lines (can be guessed, see

<small>GUESSING THE IMAGE GEOMETRY</small>

below).

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−b number

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number of bands in input image (1 by default).

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−d data_type

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type of samples in input image, where data_type

may be:

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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.

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−i config

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type of samples interleaving in input image, where

config may be:

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pixel

pixel interleaved data (default),

band

band interleaved data.

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−p photo

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photometric interpretation (color space) of the input

image, where photo may be:

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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.

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−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.

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−r number

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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

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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

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pal2rgb(1), tiffcp(1),

tiffmedian(1), libtiff(3)

Libtiff library home page:

http://www.remotesensing.org/libtiff/