Information Technology Reference
In-Depth Information
Binary Representation Syntax
The binary representation syntax is presented in Table 11.1.
To evaluate the feature similarity, a matching method for each
descriptor is described by MPEG-7. The matching method using the
DCD is expressed as follows.
Difference(
DD
,
)
=× ×
WSC
CWDC
+ ×
ff ,
(11.1)
1
2
1
Diff
Diff
2
Di
where SC Diff = | SpatialCoherency 1 − SpatialCoherency 2 | , and D 1 and D 2 are
the DCD of two images, respectively; DC Diff is the difference between two
sets of dominant colors; W 1 and W 2 are weights of the first and second terms,
respectively. DC Diff can be computed by the following distance function.
The similarity between two DCDs, F 1 and F 2 , can be measured by the fol-
lowing distance function
N
N
N
N
1
2
1
2
∑∑
1
DF F
(, )
=
p
+
p
2
a
pp
,
(11.2)
2
2
12
i
j
12
ij i
,
12
j
i
=
1
j
=
1
i
1
j
=
TaBLe 11.1
Dominant Color Binary Representation Syntax
DominantColor {
Number of bits
Mnemonic
Size
3
uimsbf
Color Space Present
1
bslbf
if(ColorSpacePresent){
Color Space
Color Space
Color SpaceType
}
if(Color Quantization Present
1
bslbf
if(Color Quantization Present) {
Color Quantization
Color Quantization
Color QuantizationType
}
Variance Present
1
bslbf
Spatial Coherency
5
uimsbf
for( k=0; k<Size; k++ ) {
Percentage
5
uimsbf
for( m=0; m<3; m++ ) {
Index
1-12
uimsbf
if(VariancePresent) {
Color Variance
1
uimsbf
}
}
}
}
 
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