Power Efficient Image Processing with TMR Tunable Hybrid Approximate Adders

Gulafshan Gulafshan, Rajat Kumar, Danial Khan, Selma Amara, Yehia Massoud*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


An emerging spintronic device, magnetic tunnel junction (MTJ) mitigates the challenges like leakage power, high dynamic power as well as static power, faced by present CMOS technology. The non-volatility offers extra power saving during idle state by completely shut-down a MTJ based circuits without losing any data or extra hardware. Further, an approximate computing is a reliable technique for improving significant performance in trade of accuracy. In this paper, two fully non-volatile, 1-bit approximate adders are proposed with error distance in sum is two, extended to 12-bit hybrid adder in which a mix of approximate adders are placed on lower significant bits (LSB) and exact adder (EXA3) is placed on higher significant bits, and these hybrid adders are employed in image processing (implementing Gaussian filter) for removing noise. It is observed that the proposed adder (AXMFA1) is 23 % power efficient and reduces delay by 21 % by slightly compromising the accuracy (maximum error distance is 5) that implies the degradation in image quality: reduction of PSNR and SSIM by 0.13% and 0.28%.

Original languageEnglish (US)
Title of host publication2023 IEEE 23rd International Conference on Nanotechnology, NANO 2023
PublisherIEEE Computer Society
Number of pages6
ISBN (Electronic)9798350333466
StatePublished - 2023
Event23rd IEEE International Conference on Nanotechnology, NANO 2023 - Jeju City, Korea, Republic of
Duration: Jul 2 2023Jul 5 2023

Publication series

NameProceedings of the IEEE Conference on Nanotechnology
ISSN (Print)1944-9399
ISSN (Electronic)1944-9380


Conference23rd IEEE International Conference on Nanotechnology, NANO 2023
Country/TerritoryKorea, Republic of
CityJeju City

ASJC Scopus subject areas

  • Bioengineering
  • Electrical and Electronic Engineering
  • Materials Chemistry
  • Condensed Matter Physics


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