1. An efficient post-processing adaptive filtering technique to rectifying the flickering effects
- Author
-
Anudeep Gandam, Sahil Verma, Yunyoung Nam, Jagroop Singh Sidhu, Anand Nayyar, Mohamed Abouhawwash, and Noor Zaman
- Subjects
Computer science ,Physiology ,Visual System ,Image Processing ,Sensory Physiology ,Signal-To-Noise Ratio ,Blocking (statistics) ,Electronics Engineering ,Signal Decoders ,Computer vision ,Data Management ,Multidisciplinary ,Applied Mathematics ,Simulation and Modeling ,Sensory Systems ,Adaptive filter ,Physical Sciences ,Medicine ,Engineering and Technology ,Artifacts ,Decoding methods ,Algorithms ,Degradation (telecommunications) ,Research Article ,Computer and Information Sciences ,Imaging Techniques ,Science ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,Video Compression ,Research and Analysis Methods ,Quantization ,Humans ,Computer Simulation ,Signal to Noise Ratio ,Artifact (error) ,business.industry ,Flicker ,Biology and Life Sciences ,Ringing ,Data Compression ,Image Enhancement ,Filter (video) ,Signal Processing ,Artificial intelligence ,Electronics ,business ,Mathematics ,Neuroscience - Abstract
Compression at a very low bit rate(≤0.5bpp) causes degradation in video frames with standard decoding algorithms like H.261, H.262, H.264, and MPEG-1 and MPEG-4, which itself produces lots of artifacts. This paper focuses on an efficient pre-and post-processing technique (PP-AFT) to address and rectify the problems of quantization error, ringing, blocking artifact, and flickering effect, which significantly degrade the visual quality of video frames. The PP-AFT method differentiates the blocked images or frames using activity function into different regions and developed adaptive filters as per the classified region. The designed process also introduces an adaptive flicker extraction and removal method and a 2-D filter to remove ringing effects in edge regions. The PP-AFT technique is implemented on various videos, and results are compared with different existing techniques using performance metrics like PSNR-B, MSSIM, and GBIM. Simulation results show significant improvement in the subjective quality of different video frames. The proposed method outperforms state-of-the-art de-blocking methods in terms of PSNR-B with average value lying between (0.7–1.9db) while (35.83–47.7%) reduced average GBIM keeping MSSIM values very close to the original sequence statistically 0.978.
- Published
- 2021