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Optical Engineering

Constrained two-bit transform for low-complexity motion estimation
Author(s): Changryoul Choi; Jechang Jeong
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Paper Abstract

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.

Paper Details

Date Published: 23 June 2014
PDF: 7 pages
Opt. Eng. 53(6) 063104 doi: 10.1117/1.OE.53.6.063104
Published in: Optical Engineering Volume 53, Issue 6
Show Author Affiliations
Changryoul Choi, Hanyang Univ. (Korea, Republic of)
Jechang Jeong, Hanyang Univ. (Korea, Republic of)

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