^ ^ ^ ^
scales of window
-S— bandi
— band2
-£— band3
band4
-•— band5
H— band7
-bandi - mean the combination of band51-bandi-band54
Figure 3. Relationship between the OIF value and the scales
of the window 6
6. CONCLUSION
Combine discussing the OIF value with the scales of sliding
window, which make the final results more extensive meaning
in different scales. Because of different sizes represent
different scales in sliding window method, the OIF value which
calculated represent the distribution situation of different
scales.
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REFERENCE
The author is grateful for support through the following
Grants: project of central scientific research institution with
public welfare (YWF200809 and YWF0721/AQ01 ,
YWF0723/AQ03)
ACKNOWLEDGEMENT
It can be concluded the following points by contrasting display
effect of many images and referencing Figure 3 relation
between the OIF value and the scales of the window.
(l)the optimal sliding window is 3x3 . The origin dada in
this paper is ETM+ RS image whose ground resolution is 30
meters. So 3 pixels in the image mean 90 meters in the actual
length. In this scale, most of medium and large-scale geological
phenomena can be recognized easily in the image. And small
geological phenomena will be filtered which will decrease the
disturbance from the theme. In this scale of window, RS image
has the better effect than that of any other else scales. The more
large of the scale is , the worse of display effect will be.
The International Archives of the Photogrammetry, Remote Sensing
calculated by above methods we have talked. Then the OIF
value we have got can be statistical analysis for finding the
optimal sliding window.
The concrete contents are as follows:
\SfPX
size=3
size=5
size=7
size=9
-bandl-
316.4495
229.9329
198.9636
181.0253
-band2-
431.3088
286.9773
237.6239
211.1394
-band3-
377.6173
285.1752
251.4869
231.3289
-band4-
128.9929
126.7493
125.1496
122.9298
-band5-
142.4992
140.998
139.3708
136.8546
-band7-
192.24
190.5205
187.5389
183.2421
size=l 1
size=13
size=15
size=17
-bandi-
169.5374
164.2567
160.0913
155.4631
-band2-
194.6742
186.542
180.3785
174.1038
-band3-
217.9556
212.1879
206.9307
199.9323
-band4-
121.3445
122.3527
123.1257
122.8622
-band5-
134.9143
135.7672
136.3186
135.7962
-band7-
178.3932
176.9705
176.1066
174.2258
size=19
size=21
size=31
size=41
-bandi-
150.7933
147.8115
129.5668
118.4827
-band2-
168.0672
164.1161
141.8316
128.638
-band3-
193.1976
188.7883
163.6851
148.5688
-band4-
122.0708
122.2362
115.5704
109.892
-band5-
134.7398
134.6939
126.3652
119.1299
-band7-
171.8355
171.0026
159.2047
149.9347
-bandl- mean the combination of band51-bandl-band54
Table 1. OIF value statistical table
9n Ina ¿no