International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B5. Istanhul 2004 
SAT | Kar R (Marke) (3) 
yo Vd -R'(y, zv.) 
R'- Rx, ver(xsv))- ks 1° tk, ir’ +k, T 
EX ya) = (x, ~X,) Hy, -y) 
  
Xy yg are the coordinates with distortion, xy ys are the 
  
Z 
m coordinates without distortion, xo, yg are the coordinates of 
principal point, ko, k;, k» are the coefficients of radial distortion. 
These equations are used in the software for distortion 
parameters calculation. As a data input the set of true 
Figure 1. MTV-54CSP (Mintron) CCD camera coordinates from calibration field and the set of image 
| coordinates of crosses are used. 
| 2. IMAGE PRE-PROCESSING 
| Both cameras are non-metric. In this case, for using in 
| photogrammetry, it is necessary to make a camera calibration. 
We have made only simple camera calibration to decrease 
| image distortion. A special method based on image calibration 
| and self-made software was designed. As a reference image, the 
calibration field composed of a set of regular small crosses on a 
s from the | paper sheet was prepared. 
zech king | 
er family. 
e 19" and | 
with lime 
‘the floor 
| 
ead tablet | 
(from the | 
im) shield 
| 
  
   
  
nce using 
1eological | 
e buttons, | 
amera for 
vice with | 
5” colour 
» (440000 | Figure 2. XL PRO VideoProbe (Everest-Vit) bore scope 
up to 12 | 
1e use of The equations of collinear transformation (1) are completed 
and 8mm | with correction part for expression of image distortion (2): 
: à | ax TOO ; 
Enterprise | X= À 1 (1) Figure 3. Simple radial image distortion suppressing (original 
objectives | gx +hy+ image and processed image) 
gth 6mm | : 
Dy | ditey t f rt sonia 
CCD tota | E mU The next step is the elimination of known radial distortion from 
,000 sec., gx+hy+1 images by using of another software. This software uses inverse 
ra MIC | equation to equation (3) and iteration: 
a specia ; 
data were MT Rx. = %) = NET (2) Xx, =X. +R’ (x —X ) (4) 
; ox+hy+tl d b d (9 / 
» = R° 
| dxey* f yo" Xy *R^(ya- Yo) 
’ 
p > R Yı7YyYa)= 
oe ( (7) gx thy