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Lossy image compression based on efficient multiplier-less 8-points DCT
Multimedia Systems ( IF 3.9 ) Pub Date : 2021-06-14 , DOI: 10.1007/s00530-021-00762-0
Nabila Brahimi , Toufik Bouden , Tahar Brahimi , Larbi Boubchir

This paper presents an approximate multiplication-free of discrete cosine transform (DCT) for still image compression. The introduction of null elements into a specified integer DCT leads to a new low complexity, faster and more efficient transform. Furthermore, an efficient fast algorithm primarily involving a small amount of arithmetical computation is well developed as no multiplications are required, with only 18 additions and 6-bit shift operations, thus ensuring a reduction of 25%. The orthogonality property is also preserved. Experimental results show that the proposed transform, with low computational complexity, achieves good image compression performance compared to its original transform. As a result, it outperforms other existing transforms having the same number of arithmetical operations while ensuring a good trade-off between computational complexity and performances.



中文翻译:

基于高效无乘数 8 点 DCT 的有损图像压缩

本文提出了一种用于静止图像压缩的近似无乘法离散余弦变换 (DCT)。将空元素引入指定的整数 DCT 导致新的低复杂度、更快和更有效的变换。此外,开发了一种主要涉及少量算术计算的高效快速算法,无需乘法,只需18次加法和6位移位操作,从而确保减少25%。正交性属性也被保留。实验结果表明,与原始变换相比,所提出的变换具有较低的计算复杂度,实现了良好的图像压缩性能。因此,

更新日期:2021-06-14
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