Data-independent low-complexity KLT approximations for image and video coding

作者：

Highlights：

• We introduce low-complexity data independent approximations for KLT.

• Our formalism approximates the KLT while covering the entire correlation scenario.

• Derived 4-, 8-, 16-, and 32-point transforms optimize coding and proximity to KLT.

• Optimal KLT approximations are embedded into image and video compression schemes.

摘要

•We introduce low-complexity data independent approximations for KLT.•Our formalism approximates the KLT while covering the entire correlation scenario.•Derived 4-, 8-, 16-, and 32-point transforms optimize coding and proximity to KLT.•Optimal KLT approximations are embedded into image and video compression schemes.

论文关键词：Approximate transform,Image compression,Karhunen–Loève transform,Low-complexity transforms,Signed KLT

论文评审过程：Received 27 May 2021, Revised 1 October 2021, Accepted 6 November 2021, Available online 11 December 2021, Version of Record 20 December 2021.

论文官网地址：https://doi.org/10.1016/j.image.2021.116585