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相关概念视频

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In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
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一个改进的图像压缩算法使用2D DWT和PCA与Canonical Huffman编码.

Rajiv Ranjan1, Prabhat Kumar2

  • 1Department of Information Technology, BIT Sindri, Dhanbad 828123, India.

Entropy (Basel, Switzerland)
|October 28, 2023
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概括
此摘要是机器生成的。

本研究介绍了一种混合图像压缩技术,使用了正规的哈夫曼编码 (CHC),离散波量变换 (DWT) 和主要组件分析 (PCA). 这种新的方法显著提高了各种图像类型的压缩效率和视觉质量.

关键词:
二维离散波形变换 (2D DWT)正规的哈夫曼编码 (CHC)硬值是指一个硬值.有损的图像压缩压缩.

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科学领域:

  • 计算机科学 计算机科学
  • 数字图像处理 数字图像处理
  • 数据压缩数据压缩

背景情况:

  • 数字图像数据的数量不断增加,需要有效的存储和传输解决方案.
  • 现有的图像压缩技术经常面临压缩比,编码/解码速度和图像质量之间的权衡.
  • 与传统的二进制Huffman代码相比,Canonical Huffman编码 (CHC) 提供了更快的解码,使其对实时应用具有吸引力.

研究的目的:

  • 开发一种混合图像压缩模型,将离散波形变换 (DWT),佳能哈夫曼编码 (CHC) 和主要组件分析 (PCA) 结合起来.
  • 为了提高图像压缩效率并保持高视觉质量.
  • 与现有方法相比,减少解码时间.

主要方法:

  • 通过应用PCA实现了损耗压缩方法,其次是DWT和CHC.
  • 混合型号整合了DWT,CHC和PCA的优势,以获得卓越的性能.
  • 拟议的技术在各种彩色和灰度图像上进行了评估.

主要成果:

  • 混合方法实现了高达60%的压缩,同时保持高视觉质量.
  • 在峰值信号噪声比 (PSNR) 中观察到显著改善,彩色图像显示17dB和22dB的增长,灰度图像提高了5dB和8dB.
  • 该技术减少了每像素位数 (bpp) 的得分,表明了更高的压缩效率.

结论:

  • 拟议的DWT,CHC和PCA混合模型提供了一个优越的图像压缩解决方案.
  • 这种方法在PSNR和bpp方面都优于现有技术,在压缩和质量之间提供了更好的平衡.
  • 使用CHC有助于缩短解码时间,使该技术适用于需要快速图像重建的应用.