DV
 |
 |
 |
 |
Movie Box DV versus Dazzle 150
Data acquisition system
The following images were taken at the prime focus of a Fluorite 55 mm F/8 refractor (same focus and light for all images).
- Video camera :
Neptune 100 (Watec Co Ltd) with 1/2" interline transfert CCD detector
delivering an analog video signal (same video camera setting for all images).
- DV acquisition/compression :
Pinnacle Movie Box DV (3.6 Mo/s) and Pinnacle 8 acquisition software
(sofware default setting for intensity and contrast).
IEEE 1394 connnection.
No delay between acquisition and display.
- MPEG2 acquisition/compression :
Dazzle 150 convertor (800 ko/s) and Movie Star acquisition software
(several settings for intensity and contrast were tried).
USB2 connection.
2 to 3 seconds delay between acquisition and display.
First set of comparison
220 images composite
Unsharp mask (1.8 1)
Default software setting for DV acquisition
3 software setting trials for MPEG 2 acquisition
| DV
|
|
|
|
|
2 images composite
Unsharp mask (1.8 1)
Default software setting for DV acquisition
 |
 |
Conclusion :
DV compression gives better resolution at the expense of larger
files (220 Mo/mn for DV and 70 Mo/mn for MPEG2).
MPEG2 compression gives less noisy images.