Reducing compression artifacts such as ringing and blocking is one of important issues
to improve a visual quality of a JPEG compressed image. In this paper, we propose
a new post processing technique based on bilateral filtering (BF), which is one of the
techniques that are used to reduce compression artifacts. An important issue with the application
of the BF is the selection of the filter parameters, which affects the result significantly.
In this work,We suggest a new method to select the filter parameter automatically.
In addition to artifact reduction using the BF, a contrast enhancement is performed to
overcome the contrast loss problem due to compression. The experimental result shows
that the proposed approach can alleviate the artifacts efficiently.
Keywords？ bilateral filtering, artifact reduction, contrast enhancement, blocking artifact,
ringing artifact, JPEG compression.