Paper Info
Title
On-chip spatial filter for subretinal implants
Abstract
Retinal implants are raising hope for blind people to restore part of their visual capabilities. Enormous advances have taken place in this field while several groups worldwide are striving to achieve this long-yearned-for accomplishment. Current studies about visual perception parameters from patients using subretinal implants showed that effects like electric field interference limit the achievable visual acuity. According to our previous work, discussing a model of the implant-plus-retina system, this effect could be moderated by the implementation of a spatial high-pass filter. This work introduces an on-chip realization of a contrast enhancement circuit using a four-neighbor high-pass filter, extending the functionality of an existing retinal stimulator. For the evaluation of different filter kernels a new approach, combining the methods of image processing with the techniques of analog circuit design, is proposed. The circuits discussed in this work are already designed and they will be fabricated in a 180nm CMOS technology in near future.
Year
DOI
Venue
2015
10.1109/NORCHIP.2015.7364401
2015 Nordic Circuits and Systems Conference (NORCAS): NORCHIP & International Symposium on System-on-Chip (SoC)
Keywords
Field
DocType
on-chip spatial filter,subretinal implants,blind people,visual perception,electric field interference,visual acuity,implant-plus-retina system,high-pass filter,contrast enhancement circuit,image processing,CMOS technology,size 180 nm
Computer science,Image processing,Real-time computing,Electronic engineering,Artificial intelligence,Visual perception,Spatial filter,Computer vision,System on a chip,Visualization,CMOS,Electronic circuit,Retinal implant
Conference
Citations 
PageRank 
References 
1
0.43
2
Authors
4
Name
Order
Citations
PageRank
Viola Rieger132.40
henning schutz211.79
stefan gambach310.43
Albrecht Rothermel48117.91