s. 
EE TETE EEE Torre 
k^ 
rescented in some detail in this section in 
table 2. 
ANALYSES OF RESULTS 
The results listed in table 2 are quite 
useful in finding answers to basic questions 
related to experimental design. The analyses of 
results, in general, follow this scheme. 
Bi. Does MOV technique improve accuracy of esti- 
mate of Y and how does it compare with simple 
Monte Carlo technique?. To begin with, the re- 
sults nf case À and case H may be compared. The 
reduction in variance is of the order of sos. 
Additional computer time required for this is 
only about 252. The answer is thus clearly affi- 
rmative. 
. Which statistical  scheme/eg. is best 
suited to the normal case in close range photog- 
rammetry? We can find the answer in this 
through step by step comparisons. Result of 
cases B and C indicate that it is better to use 
the same random number stream for processing the 
nces at the various points and further that 
preferable to adjust the random numbers to 
a mean of zero. Again, comparison of case 
pr case À with case D indicates that it is 
heiter to use a computed value using eq.3.4 far 
bi vector rather than use a value nf ! for each 
of the elements in the vector. If we compare the 
results of cases D or F nr B against result of 
£ 
Varia 
its 
visid 
we + = 
case H, we understand that use of eg. 3.5 a & 
combined in one would be preferable to use c 
Bither 3.5a alone or 3.6b alone or e&eg.3.1. This 
is attributable to the maximum reduction in the 
magnitude of the residusics realizable in rase H. 
er 
“ta 
Table 2: Variantes obtained by use of different 
methods 
EERE RIBERA eat an ni Eté en ds 
B. pi.d.pl.2.pio DESCRIPTION/RENARKS 
.5 5,7 11.6 Simple Monte Carlo tech. 85= 
53. No HCY Para. used. Fun 
time = 2M 125. 
Resind used, File:MCVOIR OUT 
B 112,4 90,3 37.8 Œhi=i, HCV technique used, MCY= 
B.Different ran.numberz used 
at each step. Rand. nos. nnt 
adi. to mean ©, All MEY can 
be located in pone plane. Ho 
rewind used, HCVOIE,QU7. 
Ref.eg.s,1 
C 103.5 79,0 62,4 MEV tech. NEW z B.Hand. nos. 
adj. to mean 0, hi-i.Ptz.iü8, 
19, 235,22, 31,358.37 | reveal 
large diff.bet.calc. & true 
values, All MEV Ÿ are equal, 
No Rewind HCVOIC.QUT, 
Ref, eg. 3.1. 
D 2.5 5.7 11.3 MLV tech. 58254. MDCV-B,. Five 
pts chow neg cov. bet Y k X. 
Correction computed as in 
Kobayashi.Ref.eg.3.1.Var. is 
not reduced. MHUCVOID,DUT. 
m 
Hal 
Ln 
rn 
^ 
42 
bt 
Ea 
^ 
dt 
n 
e 
^ 
rn 
Fa 
^ 
t4 
trs 
^ 
kJ 
{Table ? Continued.! 
HCY tech.B points all in one 
plane. Diff, rand. nos. used 
for Bach control variable. 
MCVBID.2UT. Ref.eng. 3.1. 
HCY tech, 55=54,WHCV = 8. In 
computing corrections cont- 
ributinns arising from pos. 
bi values only are taken 
into account. Yer. red, i= 
quite good, MCVBIE.DUT. 
Ref. eg. 3.&5b. 
t 
2.1 5,7 HCY = 8. They are unequai Y 
coord. of control points, 
Yar.red. obtained by use of 
neg. bi values only. 
HECVOIF.DUT.Ref.en. 3.81. 
"1 
e 
x 
RI 
H 0.04 0,4 T.& HCV = B, bi values calc. 
from CEBINV, Var red ohtd. 
by consideration and seper- 
ste treatment of positive 
and neg. bi values.Run time: 
2M 455. HDCVGiB5.üuT. 
Ref. eg. 3.483 & 3.8kh. 
i 358.0 28,8 21.0 MOY = 3eB =24.No improvement 
in var. of comp.Y-coords.S5= 
54, Fun time:4H105 HCVOZR. OUT 
Ref, eg. 3.88 & S.àh. 
d 1.25 3,5... 8.2. MEV= 4.0nly Y-zoord of cont, 
pts used.Var.red, = 20%. The 
4 pts are situated similar 
tn mid-side fiducial marks 
in HCVB3A.0UT.The Four pis 
arg situated at corner nf 
tont. field in HCVUSA.2UT. 
Run timez2M 375.HOVEIA. GUT & 
.BSUT.Ref. bg. 2.53 & 3.àb. 
i 0.7 2.8: 7.0 MCV = 7. Bignificant red. of 
var. Run time-z2M 308.HCVB3A 
.DUA,.BUR,, GUC, BUD, 
Ref. eg. 3.58 & 3.&b. 
p 
i283 4.1. 9.1. MEN e 1. Binnificant red, of 
var, is observed. Run time = 
2M 238. MCVOGA.QUI T8 .8US. 
Ref. eg. 3.83 & b. 
H 5.4 2.3 0.3 Same as case H except that 
the ref. pi, fur calc. of hi 
is changed to 32. MHDVBIBG.2UT 
H 1.3 0.1. 0.5. Same as case H except that 
The ref. pt. for calc. is 
changed to 22. MEVB1G. 3UT 
Notes: unit for variances is mmtt2, SB-Sampie 
cire used in gstimating variances. HCV : 
No.of Multi-conirol var. used. MDUBD??,?? 
refer to output file names. In case of 
methods K & L, as the variations were 
very small for the different cases, only 
one representative value is listed. pl. 
stands for plane.