is a general-purpose image display and analysis program for the Microsoft®
Windows™ operating systems with special features for analyzing satellite
has been designed to work with digital images. In the WIM parlor an image
is simply a two-dimensional array (matrix) of numbers representing the
values of its elements (pixels). Digital images of this kind are produced
by satellite sensors, medical imaging devices, computer models, etc.
There are many ways and formats to store digital images. The simplest
is a sequence of numbers (e.g. row by row) representing the picture elements
(pixels) which is often referred to as unformatted raster image. In this
case the total number of pixels equals the number of rows times the number
of columns, an the file size equals the number of pixels times the number
of bytes per pixel. More complex formats add more information to the file,
e.g. the dimensions, color palettes, geometric projections and other ancillary
data. The image data may be compressed to reduce the storage requirements.
The file formats
that WIM can read include:
- NetCDF (versions 3 and 4), HDF4 (*.hdf) and HDF5 (*.h5)
raster images of unsigned byte, one bit, unsigned integer (2 bytes)
or floating point (4 bytes) pixels;
A special type of unformatted raster images corresponding to the
North-East coastline of the US (NEC) in the Lambert Conic projection.
Multi-band images of band-sequential, line-interleaved and pixel-interleaved
CoastWatch (NOAA/NESDIS) formats of compressed or uncompressed images
that include ancillary information and may include overlays of coastlines
and other features;
Compressed (run-length encoded) images;
Erdas/Lan format images;
in HDF (Hierarchical Data Format) that include raster-8 images and
Scientific Data Sets (SDS) with special functions for the SeaWiFS,
SSM/I, OCTS and MOS satellite sensors as well as HDF files transformed
from the Terascan data sets.