E10: diagonal direction texture sub-image of first scale 
While extracting texture structure of image, we got nine sub 
images, classified three groups, first group consists of E8, 
E9and E10, second group consists of E5, E6 and E7, third 
group consists of E2 , E3 and E4. They express texture 
structure of image on vertical direction horizontal direction 
and diagonal direction on three scales. We use nine sub-image 
texture structure character of image, constructing three 
identified parameters separately. 
A l = ASM 4/(ASM 2 + ASM 3) (2) 
A 2 = ASM 7/{ASM 5 + ASM 6) (3) 
A 3 = ASM 10/( ASM 8 + ASM 9) (4) 
where ASM refers to equation 1 
A 
1 : indicator of 3 level decomposition 
A 2 : indicator of 2 level decomposition 
A 3 : indicator of 1 level decomposition 
From equation 2, 3 and 4, the indicators of this texture index is 
the ratio of average energy for texture sub-image at same scale, 
so they have the invariable property to the angle of 
circumrotating 90° 180° and 270° . 
changjiang, 
—CHANCJIANG2 
changjiakl 
Figure 4. code of sub-image block 
The curve from the average energy of sub-image of the 
changjiang river samples 
Figure 5. code of sub-image block 
The curve from the average energy of sub-image of house 
samples 
By means of the three index of texture characters it is favorable 
in classification and identify. 
In Quick Bird image, we cut out 64*64 image of some 
kind land image for statistics character texture index 4 
House 
Pond 
Lake 
Figure 3. Texture image samples of some kinds of land 
64*64 size 
4. CONCLUSIONS 
350 
300 
250 
200 
150 
§ 100 
> 
< 
50 
0 
♦ gendl 
■ gend2 
gend3 
* gend4 
Figure 6. code of sub-image block 
The curve from the average energy of sub-image of infiled 
samples 
Figure 7. code of sub-image block 
The curve from the average energy of sub-image of lake 
samples 
Based on 2-D lifting-based DWT 9/7wavelet filter and Gray 
Level Co-occurrence Matrix method is used for texture 
classification ,we can get the curve of from the average energy 
of sub-image of used land samples, and texture classification 
parameters of some kind of land samples. 
o “ 
1 2 
Fig 
The curve from t 
samples 
70 r 
o L - - 1 - 
1 2 
Fig 
The curve from 
samples 
kind 
changjiang 
river 
house 
infiled 
lake 
woodlang 
pond 
Table 1. tex 
REFERENCES 
Wim Sweldens, 1 
construction of bi 
Anal., 3( 2), pp. If 
S. BARUA, J. E. i 
efficient architecti 
wavelet transform: 
Chen shan, qin qi- 
structure in the 
transform, geogrc 
9.(in Chinese) 
I. Daubechies. 
supported wavelet 
200.