ropy 
1dom 
Fior 
onal 
1at- 
vith 
iY 
hat 
1S a 
“ion 
ent 
such 
m 
of 
ior 
ring 
on, 
tion 
ity, 
Ling 
z in 
X) 
^ome 
ited 
only 
(p)1 
)0 ) 
tion 
to 
Lion 
or 
ced 
ity 
are. 
lity 
ling 
rib- 
; in 
Lou- 
oti- 
ite, 
ying 
tain 
N 
the 
ilue 
lues 
"ter 
time,then oscillatory mean in this range should be 
considered as calculated true value in firm state. 
Through dynamic recognition, some appreciable 
errors of I(C)J can be checked over, then the IL 
value can be obtained with higher accuracy. 
IL% 
40r À 
. o =" 
30 
  
n 9n 16n 
FIG.2, IL calculated process concerned with 
function-SCALE 
The figure 2 shows IL calculated process concerned 
with function-SCALE in the lower-relief area, the 
enhanced contents is lineaments.Statistical number 
N is added progressively according to the 
progressive calculation ordinal number i, namely N 
-i n, in which n is 14 ( I(P)J has 14 kinds of 
distribution states) . calculated initial IL value 
is 62%, when the statistical number is added from 
3n,4n---until 16n,IL value is oscillating in 30%- 
34% range, in which the mean of IL values obtained 
with 1.7% accuracy is 319%. 
When calculating the IL value in strong relief 
area covered by snow with composite processing 
program of function-CONVOLVE, initial value is 5996, 
in 2n--15n statistical interval,the IL oscillation 
range is 48%-51%, in which the IL mean obtained 
with 1.1% accuracy is 49%. 
When N=14n , the IL had exceeded this firm 
oscillatory range,through check,that was caused by 
fuzzily deciding to three underexposure images, 
thus which were not listed into statistical range. 
That can be known as above,when statistical number 
N is more than 3n, the IL value which is available 
for reference can be obtained , and accurate IL 
value also needs not above mentioned large 
statistical number. 
6.THE BUDGET FORMULA FOR EVALUATING 
IPOS ENHANCEMENT EFFECT 
Any and all functions are unable to reflect 
actualities signals hidden in original image all 
to nothing, thus, for giving full play to system 
enhancement potential, the series-parallel 
connection programs of system functions must be 
established. 
6.1 THE BUDGET FORMULA OF ENHANCEMENT EFFECT FOR 
PARALLEL CONNECTION SYSTEM 
The so-called parallel connection program, that is 
to say , some one image which wants processing is 
operated by each of all parallel functions 
respectively, thus obtaining a number of parallel 
and singular processed results of same image, that 
can obtain each other’s strong points to make up 
for one’s weakness among different results,and can 
Fully reflect actualities signals of original 
image. 
Suppose the reliability of function i obtaining 
65 
information is IL’i,then unreliability  Fi-l-IL'i. 
In such a case of parallel connection, only when 
all functions have broken down together, the whole 
system is regarded as to be out of order. with 
reference to the probability multiplication 
theorem, the parallel connection system 
unreliability Fp is: 
n 
Fp=F1 + F2 + +++ - Fn= IT Fi . 
i=l 
As a result , the reliability of system obtaining 
information, or 
Information Level (IL)p, can be 
written as follows: 
n n 
(IL dp=1-Fp=1-IIFi=1-ITC1-IL* i) (5) 
il i=l 
6.2 THE BUDGET FORMULA OF ENHANCEMENT EFFECT 
FOR SERIES CONNECTION SYSTEM 
For giving full play to system potential, some 
image or other is operated by series orderly 
functions repeatedly and sequentially, that can 
concentrate series processed results on a single 
image, as a result, it is suitable to target 
interpretation . the series connection program can 
also participate in parallel connection operation 
with other programs or functions. 
In such a case of series connection , even if only 
one function has breakdown , the whole system at 
once breaks down. according to the probability 
multiplication theorem, the reliability (IL)s of 
system obtaining information is: 
n 
(ls TIL (6) 
i=l 
It can be known from formula (6), that information 
content obtained by processing of first function 
can be reduced progressively with later repeated 
operations, or even evanesce.In practice the blind 
series connection of functions can cause result 
revealed by formula (6). 
As to the lineament, the most part of functions 
concerned with CONTRUST ENHANCEMENT can help to 
extending dynamical variation range of image gray 
level distribution field, thus enhancing a part of 
signals, and keeping a part of non-outstanding 
actualities signals which help to being enhanced 
further. 
Suppose the original image information content 
equals 1,and if the series connection operation is 
composed of three functions having above mentioned 
property, then it can be known from formula(6),that 
information content obtained by first function is 
(T) z1-IL'1-IL'i,that non-outstanding information 
content kept by first function is(1-IL'1),thus the 
information content obtained by third function can 
resolve itself into 3 components: H^i:-1/2-1/'3 
G-L'/D- I2: ^3, (C1-IL' D-1-IL' DIL' 2] IL'3. It's 
obvious that information content obtained by third 
function is insufficient,thus the number of series 
functions must be limited to 3 at most, for this 
reason the image processing should consist of pre- 
main-after processing stages, that would be 
suitable. 
Not all functions can keep non-outstanding 
actualities singnals in image . This and that 
functions concerned with pre-after processing 
stages must help to extending dynamical variation 
range of image gray level distribution field. In 
order to making good a loss of information in main 
processing , a original or pre-processed image