Prof. Ing. Lukáš Sekanina, Ph.D.

SEKANINA Lukáš, VAŠÍČEK Zdeněk and MRÁZEK Vojtěch. Approximate Circuits in Low-Power Image and Video Processing: The Approximate Median Filter. Radioengineering. 2017, vol. 26, no. 3, pp. 623-632. ISSN 1210-2512. Available from:
Publication language:english
Original title:Approximate Circuits in Low-Power Image and Video Processing: The Approximate Median Filter
Title (cs):Aproximativní obvody v nízkopříkonovém zpracování obrazu a videa: Aproximativní mediánový filtr
Journal:Radioengineering, Vol. 26, No. 3, CZ
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Approximate computing, circuit design, evolutionary computation, image filter

Low power image and video processing circuits are crucial in many applications of computer vision. Traditional techniques used to reduce power consumption in these applications have recently been accompanied by circuit approximation methods which exploit the fact that these applications are highly error resilient and, hence, the quality of image processing can be traded for power consumption. On the basis of a literature survey, we identified the components whose implementations are the most frequently approximated and the methods used for obtaining these approximations. One of the components is the median image filter. We propose, evaluate and compare two approximation strategies based on Cartesian genetic programming applied to approximate various common implementations of the median filter. For filters developed using these approximation strategies, trade-offs between the quality of filtering and power consumption are investigated. Under conditions of our experiments we conclude that better trade-offs are achieved when the image filter is evolved from scratch rather than a conventional filter is approximated.
   author = {Luk{\'{a}}{\v{s}} Sekanina and Zden{\v{e}}k
	Va{\v{s}}{\'{i}}{\v{c}}ek and Vojt{\v{e}}ch
   title = {Approximate Circuits in Low-Power Image and Video
	Processing: The Approximate Median Filter},
   pages = {623--632},
   journal = {Radioengineering},
   volume = 26,
 number = 3,
   year = 2017,
   ISSN = {1210-2512},
   doi = {10.13164/re.2017.0623},
   language = {english},
   url = {}

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