TY - JOUR
AU - Peli, Eli
AB - Image enhancement as an aid for the visually impaired may be used to improve visibility of broadcast TV programs and to provide a portable visual aid. Initial work in this area was based on a linear model. The finite dynamic range available in the video display and contamination of the enhanced image by high spatial frequency noise limited the usefulness of this model. I propose a new enhancement method to address some of the limitations of the original model. It considers the nonlinear response of the visual system and requires enhancement of sub-threshold spatial information only. This modification increases the dynamic range available by decreasing the range previously used by the linear models to enhance visible details. Implementation of an image-enhancing visual aid in a head-mounted binocular full-field virtual vision device may cause substantial difficulties. Adaptation for the patient may be difficult due to head movement and interaction of the vestibular system response with the head-mounted display. I propose an alternate bioptic design in which the display is positioned above or below the line of sight to be examined intermittently possibly in a freeze-frame mode. Such implementation is also likely to be less expensive enabling more users access to the device. 1.
TI - New perspectives on image enhancement for the visually impaired
JF - Proceedings of SPIE
DO - 10.1117/12.25198
DA - 1991-02-01
UR - https://www.deepdyve.com/lp/spie/new-perspectives-on-image-enhancement-for-the-visually-impaired-rTKOOEVKdA
SP - 49
EP - 59
VL - 1382
IS - 1
DP - DeepDyve
ER -