4. DIGITAL IMAGE ANALYSIS 
ried out in digital image processing is the numerical 
n the basis manipulation of digital image and includes 
he area preprocessing, enhancement, and classification 
4.1 - Preprocessing: 
, satellite In the initial processing of the raw data to 
collaborate image radiometry correction, geometric 
distortions, and remove noise. 
0000 scale 
42 - Enhancement : 
Image enhancement produces a new enhanced 
image, that is displaied on (CRT), this enhanced 
image may be easier to interpret than the original 
image in different ways, for example, more efficient 
Scale use may be made of the original information. 
100000 4.3 - GEOMETRIC CORRECTION 
100000 After processing raw data and apply projection 
100000 properties of a map Which is called geometric 
100000 correction, a related technique were called 
registration, to utilizing of the coordinate system of 
ength one image to apply of same map or a second image of 
i Rr the same area, for example landsat TM image of a 
3.52 um given area might be obtained for different dates and 
).60 um the user may wish to measure changes that have 
).69 um occured in period of time, the correction with two 
).90 um image of map, a map can be defined as a graphic 
75 um representation on a plane surface of the earths' 
NU LIT surface. 
BUR 
  
kt 
X 
rab s 
- 
Ea 
$ À reared, cB 
9 
  
Fig.4 IMAGE OF STUDY AREA - 1989 
3.1 - FIELD WORK 
With these recognition units , a quick traverse 
was prepared. in the filed to collect ground truth on 
landuse map, physiography, for preparation of the 
maps corresponding to the land use map, other 
scientist have also collaborated various natural 
resources. 
53 
  
Fig.§ GEOMETRIC CORRECTION OF STUDY 
AREA 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B6. Vienna 1996