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Image Processing in the block DCT Space

Image Processing in the block DCT Space

Jayanta Mukhopadhyay Department of Computer Science & Engineering Indian Institute of Technology, Kharagpur, 721302, India jay@cse.iitkgp.ernet.in. Image Processing in the block DCT Space. Processing in the spatial domain. Processing in the compressed domain. Motivations.

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622 views • 49 slides
Deblocking Algorithms in Video and Image Compression Coding

Deblocking Algorithms in Video and Image Compression Coding

Deblocking Algorithms in Video and Image Compression Coding. Speaker: Wei-Yi Wei Advisor: Prof. Jian -Jung Ding Digital Image and Signal Processing Lab GICE, National Taiwan University. Outline. Introduction Observations of Blocking Artifact Four Categories of Deblocking Algorithms

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616 views • 40 slides
Face recognition based on DCT and 2DLDA

Face recognition based on DCT and 2DLDA

Face recognition based on DCT and 2DLDA. Hongtao Yin, Ping Fu, and Jiaqing Qiao Innovative Computing ,Information and Control, International Conference on 2007. Reporter : ??? ID:Q38971116 ??? IT-LAB 2009/12/22. Outline. Introduction Discrete Cosine Transform 2DLDA Experimental result

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389 views • 24 slides
An Efficient Method for DCT-Domain Image Resizing with Mixed Field/Frame-Mode Macroblocks

An Efficient Method for DCT-Domain Image Resizing with Mixed Field/Frame-Mode Macroblocks

An Efficient Method for DCT-Domain Image Resizing with Mixed Field/Frame-Mode Macroblocks. Changhoon Yim and Michael A. Isnardi IEEE TRANSACTION ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY, VOL. 9, NO. 5, AUGUST 1999. Outline. Introduction DCT-Domain Image Resizing

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254 views • 17 slides
Steganalysis of Block-DCT Image Steganography

Steganalysis of Block-DCT Image Steganography

Steganalysis of Block-DCT Image Steganography. Ying Wang and Pierre Moulin Beckman Institute, CSL & ECE Department University of Illinois at Urbana-Champaign September 29th, 2003. Introduction. Steganography is a branch of information hiding, aiming to achieve perfectly secret communication.

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605 views • 16 slides
Randomized Detection for Spread-Spectrum Watermarking: Defending Against Sensitivity and Other Attacks

Randomized Detection for Spread-Spectrum Watermarking: Defending Against Sensitivity and Other Attacks

Randomized Detection for Spread-Spectrum Watermarking: Defending Against Sensitivity and Other Attacks. Ramarathnam Venkatesan and Mariusz H. Jakubowski {venkie, mariuszj}@microsoft.com Cryptography and Anti-Piracy Group Microsoft Research March 20, 2005. Overview. Introduction

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257 views • 14 slides
DCT-Domain Blind Measurement of Blocking Artifacts

DCT-Domain Blind Measurement of Blocking Artifacts

DCT-Domain Blind Measurement of Blocking Artifacts. Model Blocking Artifacts as a 2-D Step Function in b Parameters are Computed in the DCT Domain HVS Based Measurement Activity masking Luminance masking. : the magnitude of s. : the background luminance. : the activity inside b.

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75 views • 7 slides

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