A reconfigurable real-time morphological system for augmented vision

Article English OPEN
Gibson, Ryan M ; Ahmadinia, Ali ; McMeekin, Scott G ; Strang, Niall C ; Morison, Gordon (2013)
  • Publisher: Springer Nature
  • Journal: EURASIP Journal on Advances in Signal Processing
  • Related identifiers: doi: 10.1186/1687-6180-2013-134
  • Subject:
    acm: ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION

There is a significant number of visually impaired individuals who suffer sensitivity loss to high spatial frequencies, for whom current optical devices are limited in degree of visual aid and practical application. Digital image and video processing offers a variety of effective visual enhancement methods that can be utilised to obtain a practical augmented vision head-mounted display device. The high spatial frequencies of an image can be extracted by edge detection techniques and overlaid on top of the original image to improve visual perception among the visually impaired. Augmented visual aid devices require highly user-customisable algorithm designs for subjective configuration per task, where current digital image processing visual aids offer very little user-configurable options. This paper presents a highly user-reconfigurable morphological edge enhancement system on field-programmable gate array, where the morphological, internal and external edge gradients can be selected from the presented architecture with specified edge thickness and magnitude. In addition, the morphology architecture supports reconfigurable shape structuring elements and configurable morphological operations. The proposed morphology-based visual enhancement system introduces a high degree of user flexibility in addition to meeting real-time constraints capable of obtaining 93 fps for high-definition image resolution.
  • References (34)
    34 references, page 1 of 4

    1. S Resnikoff, D Pascolini, D Etya'ale, I Kocur, R Pararajasegaram, GP Pokharel, SP Miariotti, Global data on visual impairment in the year. World Health Org. 82, 844-851 (2004)

    2. C Verarrt, F Duret, M Brelen, M Oozer, J Delbeke, Vision rehabilitation in the case of blindness. Expert Rev. Med. Devices 1(1), 139-153 (2004)

    3. SE Hassan, JE Lovie-Kitchin, RL Woods, Vision and mobility performance of subjects with age-related macular degeneration. Optom. Vis. Sci. 79(11), 697-707 (2002)

    4. CM Dickinson, V Fotinakis, The limitations imposed on reading by low vision aids. Optom. Vis. Sci. 77(7), 364-372 (2000)

    5. LM Watson, NC Strang, F Scobie, GD Love, D Seidel, V Manahilov, Image jitter enhances visual performance when spatial resolution is impaired. Invest. Ophthalmol. Vis. Sci. 53(10), 6004-6010 (2012)

    6. JS Wolffsohn, D Mukhopadhyay, M Rubinstein, Image enhancement of real-time television to benefit the visually impaired. Am. J. Ophthalmol. 144(3), 436-440 (2007)

    7. J Serra, Image Analysis and Mathematical Morphology, vol. I (Academic, London, 1982)

    8. E Peli, J Kim, Y Yitzhaky, RB Goldstein, RL Woods, Wide-band enhancement of television images for people with visual-impairments. J. Opt. Soc. Am. A 21(6), 937-950 (2004)

    9. E Peli, G Luo, A Bowers, N Rensing, Development and evaluation of vision multiplexing devices for vision impairment. Int. J. Artif. Intell. T. 18(3), 365-378 (2009)

    10. G Luo, P Satgunam, E Peli, Visual search performance of patients with vision impairment: effect of JPEG image enhancement. Ophthalmic Physiol. Opt. 32, 421-428 (2012)

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