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As shown in Fig. 5, the bit rate in JPEG2000 compression schemes has less im-
pact on the perceived quality of stereoscopic images when the bit rate is more than
a threshold, such as 0.1bpp, and the DMOS values is usually in a range of [0-10].
In other words, non-experts usually feel less uncomfortable when watching these
distorted images. But when the bit rate is less than 0.1bpp, the quality decreases
dramatically as the bit rate decreasing. In addition, the perceived quality is also
dependent on image contents. The DMOS value of the Bowling image that con-
tains more smooth areas is smaller than that of other images when the bit-rate is
fixed. The reason might be that JPEG2000 compression scheme discards higher
frequency components when encoding images with plenty of texture, compared
with the images with more smooth areas.
100
Art
Bowling1
Computer
Dolls
Drumsitcks
Dwarves
Laundry
Moebius
Reindeer
Rocks1
90
80
70
60
50
40
30
20
10
0
10 -2
10 -1
10 0
Rate(bpp)
Fig. 5 DMOS values of JPEG2000 compressed stereoscopic images
100
JPEG Compression
Gaus s ian blurring
JPEG2000 Compression
white Gaus s ian nois e
90
80
70
60
50
40
30
20
10
0
15
20
25
30
35
40
45
Peak Signal to Noise Ratio(PSNR)(dB)
Fig. 6 Scatter plot of Art image: DMOS values versus PSNR
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