Method and system for providing stimulation inputs to a visual prosthesis implant
Stimulation inputs are provided to a visual prosthesis implant. The images captured by a video decoder are received and digitized to provide a plurality of video frames; integrity of the video frames is checked, the checked video frames are filtered, and the filtered video frames are converted to stimulation inputs. A similar system is also disclosed.
1. A method for providing stimulation inputs to a visual prosthesis implant, comprising:
a) receiving images captured by a video decoder;
b) digitizing the images to provide a plurality of video frames;
c) checking integrity of the video frames to provide checked video frames and detecting a video overrun;
d) filtering the checked video frames to provide filtered video frames; and
e) converting the filtered video frames to stimulation inputs for the visual prosthesis implant.
2. The method of claim 1 , wherein filtering the checked video frames includes employing spatial mapping.
3. The method of claim 2 , wherein the visual prosthesis implant includes a plurality of electrodes and the spatial mapping is employed for each electrode.
4. The method of claim 1 , wherein e) includes using a brightness map.
5. The method of claim 1 , wherein b), c), d) and e) are performed on a digital signal processor (DSP), the DSP configured to be connected with the visual prosthesis implant.
6. The method of claim 5 , wherein the DSP is located in a video processing unit (VPU).
7. The method of claim 1 , wherein the video decoder is configured to be connectable to a camera and wherein a)-e) are performed with a connected camera.
8. The method of claim 1 , wherein the video decoder is configured to be connectable to a camera and wherein a)-e) are performed with a disconnected camera.
9. The method of claim 1 , wherein the filtered video frames are 6×10 grayscale pixilated images.
10. The method of claim 9 , wherein the visual prosthesis implant comprises an electrode array, the method comprising adopting an arbitrary pixel to electrode array space mapping.
11. The method of claim 1 , wherein e) further includes a mapping of luminance to electrical stimulation parameters.
12. The method of claim 11 , further including a transformation between pixel brightness and amplitude.
13. The method of claim 12 , wherein the transformation is selected between a constant transformation, a linear transformation and an exponential transformation.
14. The method of claim 1 , wherein the method is set for a multiple patient environment.
15. A method for providing stimulation inputs to a visual prosthesis implant, comprising:
a) receiving images captured by a video decoder;
b) digitizing the images to provide a plurality of video frames;
c) checking integrity of the video frames to provide checked video frames;
d) filtering the checked video frames by way of a Difference of Gaussian (DoG) filter to provide filtered video frames; and
e) converting the filtered video frames to stimulation inputs for the visual prosthesis implant.
16. The method of claim 15 , wherein the DoG filter is determined by a center Gaussian variance, a surround Gaussian variance, a center Gaussian weight, and a surround Gaussian weight.
17. A system for providing stimulation inputs to a visual prosthesis implant, comprising:
a receiver to receive images captured by a video decoder;
a digitizer to digitize the received images to provide a plurality of video frames;
a video input handler to check integrity of the video frames to provide checked video frames and to detect a video overrun;
a video filter processor to filter the checked video frames to provide filtered video frames; and
a telemetry engine video manager to convert the filtered video frames to stimulation inputs for the visual prosthesis implant.
18. The system of claim 17 , wherein the video filter processor employs spatial mapping.
19. The system of claim 18 , wherein the visual prosthesis implant includes a plurality of electrodes and the spatial mapping is employed for each electrode.
20. The system of claim 17 , wherein the telemetry engine video manager uses a brightness map.
21. The system of claim 17 , wherein the video input handler, the video filter processor and the telemetry engine video manager are in a digital signal processor (DSP), the DSP configured to be connected with the visual prosthesis implant.
22. The system of claim 21 , wherein the DSP is located in a video processing unit (VPU).
23. The system of claim 17 , wherein the video decoder is configured to be connectable to a camera and wherein the video input handler, the video filter processor and the telemetry engine video manager operate with a connected camera.
24. The system of claim 17 , wherein the video decoder is configured to be connectable to a camera and the video input handler, the video filter processor and the telemetry engine video manager operate with a disconnected camera.