as designed
nstitute for
te Sensing
ontinuously
256 colors,
esigned for
ge analysis
evelopment
ng Seminar
esearch and
scussion on
Eco-System
y NASDA,
aysia. 1994
1989 with
-DOS with
ugh version
, SpeedStar
lest version
SEAN 2.1).
System for
. The most
data format
at speed up
AN left the
lizes look -
pixel value
so problem
and overall
. ASEAN is
jues so it is
of spectral
). There are
1er for MS-
h Windows
N are as
* Data Conversion
* CD-ROM Utilities
* Windows Cutting out
* Histogram Calculation
* Image Enhancement
* Image Encoding
* Vegetation Index Calculation
* Arithmetic Operation
* Principal Component Analysis
* Optical Image Filtering
- General Filters
- Special Filters
* SAR Image Filtering
Image display
* Image Display
* Pseudo Color Image Display
* Classified Image Display
* Image Display and Print
Classification...
* Training Area Selection
* Training Area Redisplay
* Training Data Statistics Calculation
* Training Address Modification
* Maximum Likelihood Classification
Post Classification...
* Classified Image Filtering
* Area Measurement
* Class Code Change and Merge
Geometric Correction...
* Ground Control Point Selection
* [mage Control Point Selection
* Coefficient Computation and Resampling
Change Analysis...
* Plural Image Display
* Generation Of Change Matrix
* Visualization Of the Change matrix
Bird's Eye View Generation
* DEM Data Conversion
* Bird's Eye View Generation
* Bird's Eye View Image Display
Image Overlay
Help
Tutorial
The file system of ASEAN is organized as following:
.GIH Standard ASEAN image data format.
.CLS Standard ASEAN classified image format
.CPT System format for vegetation index calculation,
training data statistics calculation, modification,
classification...
.ADR Training address file
.TRN Training data statistics
.HST Histogram file
.LEV Level data file for pseudo color image display
.ENH Look up table for enhanced image display
.GCP GCP/ICP coordinate file for geometric correction
.DXY system file for geometric correction
.CHA Change matrix between two classified images
.WSP Work space mark file
.DEM Digital elevation model data file
Hardware requirement for running ASEAN is quite
standard and almost all of recent types of PC can be used for
the application. The requirement for hardware is listed as below:
35
- CPU 386 , 486 or above
- Math coprocessor
- Base memory 640 Kb
- Extended memory 3 Mb (at least)
- Floppy disk drive 5.25 and 3.5 inch
- Hard disk drive 80 Mb
- Super VGA color Monitor
- 24 bits graphics accelerator properly setup for Windows
environment
- Color printer
- CD-ROM drive
- Mouse
- Operating system MS DOS 3.3 or above
- Microsoft Windows 3.1 or latter for Windows version
3. DESCRIPTION OF SOME RELEVANT FUNCTIONS
AND ALGORITHMS
3.1 Data Conversion
In order to process image data by WinASEAN the first
step to be carried out is to convert data from different formats to
WinASEAN standard image format. WinASEAN can process
any standard image format as BSQ single file, BSQ multiple
file, BIL and BIP. The data structure of the standard
WinASEAN image format is as follows:
Header 1024 bytes
Data part: Image data in common BSQ, BIL, BIP
formats
In the header part there are important information about
the actual image data such as number of lines, number of pixels
per lines, actual image format of the image data part, location of
the data and whether the data is attached to the header or not.
Because WinASEAN can now process image of arbitrary size
(depends only on the free memory available and memory
management capability of the Windows environment) so for
huge volume of data it is better to separate header from data
part. By this way problem of copying of huge volume of data is
now abandoned. The file extension of WinASEAN data format
is .GIH. It is General Information Header. The size of the GIH
file depends on the selection in the conversion program. For
small image window it is better to include data with header but
for big image (say full scene of image stored on CD-ROM) is
better to separate header apart from data.
Image data
BSQ Ep conversion
ET, ASEAN
Bip processing
modules
Image data on CD-ROM Ta
CD-ROM —
utilities
DEM data DEM data conversion
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B6. Vienna 1996
