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http://hdl.handle.net/2080/2227
Title: | A Novel Hybrid Technique in Spatio-Frequecncy Domain for Better Quality Image and Video Up-Sampling |
Authors: | Dhara, S K Meher, S |
Keywords: | Discrete Cosine Transform Interpolation Local Variance Ringing Artifact Up-sampling |
Issue Date: | Dec-2014 |
Citation: | 11th IEEE India Conference (INDICON-2014) Emerging Trends and Innovation in Technology, IEEE Pune Section, Pune, India, 11-13 Dec 2014. |
Abstract: | Generally, at the transmitter video intra frame is sub-sampled by resizing the frame. It is very important to generate good quality high resolution frame from the receiver low resolution frame. The existing most of all up-sampling technique produce undesirable blurring and ringing artefacts. To overcome this problem, a novel technique is proposed here which use both space and frequency domain information. The proposed method use low frequency DCT (Discrete cosine transform) component to sub-sample the frame or image at the transmitter side. In transmitter side a preprocessing method is proposed where the received sub-sampled frame or image is passed through a Wiener filter which uses its local statistics in 3×3 neighbourhood to modify pixel values. The output of Wiener filter is added with optimized multiple of high frequency component. The output is then passed through a DCT block to up-sample. Result shows that the proposed method outperforms most of the widely used existing interpolation techniques in terms of objective and subjective measures. |
Description: | Copyright belongs to proceeding publisher |
URI: | http://hdl.handle.net/2080/2227 |
Appears in Collections: | Conference Papers |
Files in This Item:
File | Description | Size | Format | |
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dhara_sk.pdf | 902.3 kB | Adobe PDF | View/Open |
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