IEEE Consumer Electronics Magazine - March/April 2023 - 22

Special Section on Security, Trust and Privacy Solutions for Intelligent Internet of Vehicular Things
FIGURE 10. Result of real infrared images captured
outdoor statically.
" blocking effects " caused by video coding are also
observed in the original LR infrared image. However,
the image contains more high-frequency information,
and the texture are clear without obvious
" blocking effects " in the result of SRreconstruction.
Experiment 6: Sequence 2 of real infrared
images captured by a UAV equipped with
HSN120A infrared camera is used in this experiment,
with the original resolution of 640 480
and the SR factor of 4. The actual input images
used for reconstruction are cutting to a resolution
of 360 120 after registration, the visual
effects before and after SR reconstruction are
shown in Figure 12.
It is seen in Figure 12 that the outline of the
text object on the building signboard is fuzzy in
the original LR infrared image. However, in the SR
result, the texture structure of the text becomes
clear, and recognizable with sharp edges. It is
easy to extract information accurately from the
SR result, which creates a good condition for subsequent
target detection and other applications.
These experimental results demonstrate that
the proposed method is capable of generating
HR images with good performance in terms of
edge preservation and detail enhancement. Compared
with the original input infrared images, we
can see that not only the resolution is improved,
22
FIGURE 11. Result of sequence 1 captured byUAV.
but also the edge saliency of the targets inside
the reconstructed infrared images is significantly
enhanced.
2) Comparison With Other Algorithms The
comparison results with other traditional MISR
reconstruction methods are shown in Figure 13.
It is seen in Figure 13 that Bicubic interpolation
does not improve the quality of images too
much since a lack of complementary information
between different images in the input LR
sequence. There exists obvious sawtooth effects
in edges in the result of IBP and over-smoothing
effects in the result of POCS. It is also found that
there are many high-frequency artifacts in the
result of TV regularization. In contrast, the proposed
algorithm not only improves the resolution
and contrast but also reconstructs the highfrequency
information of the input LR image.
After reconstruction and enhancement, the textures
of these images become clear with obvious
edges, and the visual saliency of the targets is
significantly enhanced, which is beneficial to the
detection and segmentation of the infrared weak
targets.
IEEE Consumer Electronics Magazine

IEEE Consumer Electronics Magazine - March/April 2023

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