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Related Experiment Video

Updated: Jul 7, 2026

Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section

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Published on: July 19, 2016

A wavelet transform with point-symmetric extension at tile boundaries.

Igor Kharitonenko¹, Xing Zhang, Sue Twelves

¹Motorola Australian Res. Centre, Botany, NSW, Australia.

IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society

|February 6, 2008

Summary

This study introduces a novel wavelet transform using point-symmetric extension for image compression. This method effectively reduces boundary artifacts in lossy compressed image tiles without post-processing.

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Quantifying Intermembrane Distances with Serial Image Dilations

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Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section

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Published on: July 19, 2016

Quantifying Intermembrane Distances with Serial Image Dilations

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Published on: September 28, 2018

Area of Science:

Signal Processing
Image Compression
Wavelet Transforms

Background:

Lossy compression of image tiles often results in boundary artifacts.
Existing symmetric signal extension methods have limitations in addressing these artifacts.

Purpose of the Study:

To propose a low-complexity wavelet transform using point-symmetric extension for image tile boundaries.
To offer an alternative to symmetric extension for mitigating boundary artifacts.

Main Methods:

Utilized point-symmetric extension at image tile boundaries.
Developed a solution for odd-length filters preserving perfect reconstruction.
Derived equivalent boundary filters, avoiding explicit extension application.
Implemented filters using a lifting-based approach.

Main Results:

The proposed method efficiently handles blocking artifacts without post-processing.
Perfect reconstruction property of filter banks is preserved.
Boundary filters can be derived implicitly, simplifying implementation.
Lifting-based implementation allows easy filter parameter modification.

Conclusions:

Point-symmetric extension is an effective technique for reducing boundary artifacts in image compression.
The proposed lifting-based implementation offers a flexible and efficient solution for hardware and software platforms.