| vi- 
0,9 
s on 
ype 
lle i- 
red 
ration 
re is 
rm 
similar 
and a 
amera 
where 
to ro- 
anera- 
ed of 
ata a- 
tion of 
als re- 
to the 
or se- 
clock 
of the 
uency 
ection 
clock 
to a 
inter- 
| CCD 
cause 
ne or 
digital 
'emo- 
high 
ficient 
terfa- 
High 
Icula- 
sibility 
orma- 
tation 
ntefa- 
d. for 
  
  
image digital 
     
  
  
  
  
Fig.2 CCD interface block diagram 
Some parameters of thermal and visual system: 
Thermal system 
1. Thermal camera resolution 
TVS40TE - 256x60 
AGEMA 880 - 256x400 
2. A/D conversion resolution - 4/8 bits 
3. Registration rate 
real-time mode (in the memory, TVS40TE) - 1 image/ 
50ms 
real-time mode (in the memory, AGEMA 880) - 1 image/ 
160ms 
non real-time mode (on the hard disk) - t,;, = 0,5s 
4. System capacity 
real-time mode - 128 images / TMB of RAM 
non real-time mode - limited by hard disk capacity 
5. Trigering - automatic, external, by user 
6. No of colors in thermal diagrams - 16/64 pallets 
Visual system (for TVS40TE/AGEMA880) 
1. visual image resolution - 512x240 (480-interlace) 
2. A/D conversion resolution - 8 bits 
3. Sampling rate - 15MHz (Quartz-controlled PLL) 
4. Graphic processor clock (TMS34010) - 40MHz 
5. Life-Video mode - on the computer screen 
6. Visual input - /vp-p (CVS) 
7. System capacity - /imited by hard disk capacity 
8. Image procesing - filtering, edge enhancement, 
mixing, noise cancelling 
9. Graphics - 16/256 SVGA 
2. TVDS UTILIZATION FOR TERRAIN DISPLAY 
Accurate determination of real temperature in a given 
point and the borders of isotherms between temperatu- 
res on the examined area or spacial object is a signifi- 
cant problem in thermo-vision measurements. Significan- 
terrors resulting from the measurement of energy densi- 
tyemitted by an object influence temperature measure- 
ments. They depend on the error determining several 
factors which the programme take into consideration i.e.: 
emission coefficient, distance influence camera-object 
(atmospheric conditions), environment temperature and 
the process of image conversion. 
Identification of details on the examined objects where 
there is a little olifferentiation of temperature is also a 
very important problem. Vision image CCD with the po- 
ssibility of its contour and then contour extraction on 
thermogram of the examined object prior to scaling both 
images is very useful as shown in figures 3-6. Double 
bearing vectorin both image windows at scaled images 
enables to show mononual points. Having worked out 
generated images they are connected into the whole i- 
nvestigated object or in its greater parts. Then edition 
with legend and onomatology is carried out. 
  
  
  
  
Fig. 3. Enlarging with intersection of minor terrain details 
and determination of real temperature of the point. 
  
Y - 0.306 10:17:50 95/03/24 AP=0 
  
Fig. 4. Thermogram and vision image converted into 
equal skale (double bearing vector). 
117 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B1. Vienna 1996