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Constrained two-bit transform for low-complexity motion estimation

机译:低复杂度运动估计的受约束两位变换

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摘要

In transforming original image frames into two-bit representations, the typical two-bit transform (2BT) needs to calculate variances of the local blocks. This calculation of variances inevitably involves multiplication operations and renders the computational complexity of typical 2BT somewhat high. A constrained 2BT (C2BT) for low-complexity motion estimation (ME) is proposed. By exploiting advantages of the typical constrained one-bit transform (C1BT) and typical 2BT, the proposed algorithm significantly reduces the computational complexity of transformation of image frames into two-bit representations. Also, a corresponding matching criterion for C2BT is proposed to enhance the ME accuracy. Experimental results show that the proposed algorithm enhances the ME accuracy by 0.34 and 0.22 dB compared with 2BT-based ME and C1BT-based ME, respectively.
机译:在将原始图像帧转换为两位表示时,典型的两位转换(2BT)需要计算局部块的方差。方差的这种计算不可避免地涉及乘法运算,并且使典型的2BT的计算复杂性有所提高。提出了一种用于低复杂度运动估计(ME)的约束2BT(C2BT)。通过利用典型约束一比特变换(C1BT)和典型2BT的优点,该算法显着降低了将图像帧转换为两位表示的计算复杂度。另外,提出了用于C2BT的相应匹配准则以提高ME精度。实验结果表明,与基于2BT的ME和基于C1BT的ME相比,该算法将ME精度分别提高了0.34和0.22 dB。

著录项

  • 来源
    《Optical engineering》 |2014年第6期|063104.1-063104.7|共7页
  • 作者

    Changryoul Choi; Jechang Jeong;

  • 作者单位

    Hanyang University, Department of Electronics and Computer Engineering, 222 Wangsimni-ro, Seongdong-gu,Seoul, 133-791, Republic of Korea;

    Hanyang University, Department of Electronics and Computer Engineering, 222 Wangsimni-ro, Seongdong-gu,Seoul, 133-791, Republic of Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    block matching; motion estimation; two-bit transform;

    机译:块匹配;运动估计;两位变换;

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