Blur Determination in the Compressed Domain Using DCT Information
- Hong-Jiang Zhang ,
- Wei-Ying Ma ,
- Xavier Marichal
Published by Institute of Electrical and Electronics Engineers, Inc.
The paper presents a simple yet robust measure of image quality in terms of global (camera) blur. It is based on histogram computation of non-zero DCT coeficients. The technique is directly applicable to im- ages and video frames in compressed (MPEG or JPEG) domain and to all types of MPEG frames (I-, P- or B- frames). The resulting quality measure is proved to be in concordance with subjective testing and is therefore suitable for quick qualitative characterization of images and video frames.
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