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Ara Agui Nakajima DCT compression algorithm

Published on: 2025-07-12 01:25:17

Quick intro LeetArxiv is Leetcode for implementing Arxiv papers. We offer weekly, hands-on, step-by-step coding guides to programmers who want to transition into careers in research. Frontmatter for the paper ‘A Summary of the AAN Discrete Cosine Transform’. *We provide a C implementation that can be translated to other languages. 1.0 Introduction The paper, A Summary of the AAN Discrete Cosine Transform, summarizes the Discrete Cosine Transform optimizations introduced in the 1981 paper, A fast DCT-SQ Scheme for Images. We suggest opening the paper link in a separate tab while reading the walkthrough. The summary is 2 pages long. Page 1 introduces the basic Type-II Discrete Cosine Transform in Natarajan and Rao(1974). Page 2 introduces optimizations to the DCT in Ara Agui, A., and Nakajima, M. (1981). 2.0 The Basic Discrete Cosine Transform We are on Page 1 of the paper This section introduces the type-II DCT used for JPEG image compression. The author states the DCT’s desir ... Read full article.