CN102813999B - Visual prosthesis wireless transmission system with self-adaptive power regulation function and visual prosthesis wireless transmission method - Google Patents
Visual prosthesis wireless transmission system with self-adaptive power regulation function and visual prosthesis wireless transmission method Download PDFInfo
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Abstract
The invention discloses a self-adaptive power wireless transmission system and a self-adaptive power wireless transmission method which are used for visual prosthesis; the system comprises a simulator power prediction and regulation module, a signal modulation module, a radio frequency transmitting module, a radio frequency receiving module, an energy recovery module and a data demodulation module. The simulator power prediction and regulation module predicts energy that a nerve micro stimulator of the visual prosthesis works according to a data code according to the data code of an image that the visual prosthesis acquires, regulates the transmitting power of the radio frequency transmitting module accordingly, and predicts the time required for completing the regulation. The signal modulation module is used for modulating the data code and command the radio frequency transmitting module to transmit the modulated data code and the required energy to the radio frequency receiving module after the time; and the radio frequency receiving module transmits the received data code to the data demodulation module to demodulate, and transmits the received energy to the energy recovery module so as to supply energy for the nerve micro stimulator.
Description
Technical field
The present invention relates to biomedical engineering field, particularly relate to a kind of power adaptive wireless transmitting system for implanted vision prosthesis and method thereof.
Background technology
Vision prosthesis is a kind of implantable medical device helping fundus oculi disease patient to repair visual performance.Vision prosthesis gathers visual pattern by external imageing sensor (image capture module), after transformation angle and optimized image, the key message extracting image carries out data encoding, radiofrequency emitting module is used to be emitted by the signal of coding, then this signal is received by the Receiver Module in body, and by the nerve micro-stimulus device of implanted, corresponding electricity irritation is carried out to retina, optic nerve or visual cortex, bring out phosphene at the visual cortex of human brain, produce visually-perceptible to allow patient.Visible, vision prosthesis possesses higher real-time to the process of visual information, coding, transmission requirement, in addition, vision prosthesis must be implanted for a long time, carry at any time, and the volume of the device implanted is subject to strict restriction, these factors determine vision prosthesis and external compact power must be adopted to provide energy and data in the mode of wireless transmission for the device in body.
Because the effect of visually-perceptible is closely relevant with electrode density with the number of electrodes that nerve micro-stimulus device controls, and under particular stimulation condition, number of electrodes is more, density is larger, then the spatial resolution of visually-perceptible is higher, therefore be applied in the vision prosthesis research on retina at present, the number of the stimulation channels of nerve micro-stimulus device up to 256, and is expected to more than 1000.Visible, along with the quantity of the stimulation channels of vision prosthesis is on the increase, the peak power of the multichannel nerve micro-stimulus device of implanted also will increase greatly, but external power source finite capacity, how to utilize power supply energy to become the wireless transmitting system problem demanding prompt solution of vision prosthesis expeditiously.
At present, for the various schemes of wireless transmitting system capacity usage ratio how improving vision prosthesis, mostly concentrate on the conversion efficiency of the power amplifier of the radiofrequency emitting module optimized wherein, its efficiency enhancement effect is limited.The problem such as the acceptance of signal and the response lag between launching then has appearred that energy transmission efficiency is unstable, power amplifier voltage is on the low side and in other scheme.Visible, these schemes improving the wireless transmitting system capacity usage ratio of vision prosthesis are all not suitable for the actual use of vision prosthesis at present.
Therefore, those skilled in the art is devoted to develop a kind of power adaptive wireless transmitting system and method thereof, considers the relation of information and the nerve micro-stimulus device power consumption of launching from entire system angle, realizes the transmitting power automatically regulating radiofrequency emitting module.
Summary of the invention
Because the above-mentioned defect of prior art, technical problem to be solved by this invention is to provide a kind of power adaptive wireless transmitting system and method thereof, and the energy size needed in real time by prediction nerve micro-stimulus device realizes automatically regulating the transmitting power of carrying out the radiofrequency emitting module of wireless transmission.
For achieving the above object, the invention provides a kind of power adaptive wireless transmitting system, for vision prosthesis, it is characterized in that, comprise stimulator power prediction and adjustment module, signal madulation module, radiofrequency emitting module, Receiver Module, energy recovery module and data demodulation module; The data encoding of the image that described stimulator power prediction and adjustment module gather according to described vision prosthesis predicts that the institute energy requirement of the nerve micro-stimulus device of described vision prosthesis according to described data encoding work is to determine the transmitting power of described radiofrequency emitting module, and for regulating the described transmitting power of described radiofrequency emitting module; Described signal madulation module for modulate described data encoding and radiofrequency emitting module described in instruction by through the described data encoding of described modulation and described required power transfer to described Receiver Module, described Receiver Module is used for the described described data encoding through ovennodulation received being sent to described data demodulation module and thinks that described nerve micro-stimulus device provides energy to carry out demodulation and the described institute energy requirement of reception is sent to described energy recovery module.
Further, described stimulator power prediction and adjustment module predict that it completes the time of the described adjustment to described transmitting power, and described in described signal madulation module instruction, radiofrequency emitting module completes described transmission after the described time.
Further, described radiofrequency emitting module comprises E power-like amplifier, regulated power supply and square-wave generator; Described stimulator power prediction and the described transmitting power of adjustment module by regulating the output voltage of described regulated power supply to control described radiofrequency emitting module.
Further, described regulated power supply comprises the controlled partial pressure unit of multiple parallel connection, described stimulator power prediction and adjustment module make the shunt conducting at a place in described multiple controlled partial pressure unit by sending digital control signal and the shunt at other controlled partial pressure unit place are all disconnected, to control the described output voltage of described regulated power supply.
Further, described E power-like amplifier comprises metal-oxide-semiconductor and transmitting coil.
Further, described Receiver Module comprises receiving coil.
Further, described transmitting coil and receiving coil are all plane thread type coil.
Further, described plane thread type coil is the coil of insulation litz wire of multiturn or the coil of the enamel covered wire of multiturn.
Present invention also offers a kind of power adaptive radio transmitting method, for vision prosthesis, it is characterized in that, comprise step: the data encoding of the image that described vision prosthesis is gathered is sent to stimulator power prediction and adjustment module; According to described data encoding, described stimulator power prediction and adjustment module predict that the institute energy requirement of the nerve micro-stimulus device of described vision prosthesis according to described data encoding work is to determine the transmitting power of described radiofrequency emitting module; Described stimulator power prediction and adjustment module predict that it completes the time of the described transmitting power regulating described radiofrequency emitting module; Described stimulator power prediction and the described transmitting power of adjustment module to described radiofrequency emitting module carry out described adjustment; Described signal madulation module modulates described data encoding and instruction radiofrequency emitting module completes described transmission by through the described data encoding of described modulation and described required power transfer to the Receiver Module of described vision prosthesis after the described time; The described described data encoding through ovennodulation received is sent to data demodulation module with the described data encoding of demodulation through described modulation by described Receiver Module, and the described institute energy requirement received is sent to energy recovery module and thinks that described nerve micro-stimulus device provides energy.
In better embodiment of the present invention, power adaptive wireless transmitting system of the present invention comprises stimulator power prediction and adjustment module, signal madulation module, radiofrequency emitting module, Receiver Module, energy recovery module and data demodulation module.Wherein, stimulator power prediction and adjustment module, signal madulation module and radiofrequency emitting module are outer bodies; Receiver Module, energy recovery module and data demodulation module are parts in body, and the wireless transmit being conveyed through radiofrequency emitting module and Receiver Module and the reception of data between the two and energy realize.Wherein, radiofrequency emitting module comprises E power-like amplifier, regulated power supply and square-wave generator.Power adaptive radio transmitting method of the present invention comprises step: the data encoding of the image of vision prosthesis collection is sent to stimulator power prediction and adjustment module; According to this data encoding, stimulator power prediction and adjustment module predict that the nerve micro-stimulus device of vision prosthesis is according to institute's energy requirement of this data encoding work and according to the transmitting power of this energy requirement determination radiofrequency emitting module; Stimulator power prediction and adjustment module predict that its basis completes the time of the adjustment of the transmitting power of radio frequency transmitter module; Stimulator power prediction and adjustment module regulate the output voltage of the regulated power supply of radiofrequency emitting module to regulate the transmitting power of radiofrequency emitting module; Signal madulation module modulates this data encoding and instruction radiofrequency emitting module completes transmission to Receiver Module by through the data encoding of ovennodulation and required power transfer after the above-mentioned time; The data encoding through ovennodulation received is sent to data demodulation module with the data encoding of demodulation through ovennodulation by Receiver Module, and institute's energy requirement of reception is sent to energy recovery module thinks that nerve micro-stimulus device provides energy.
As can be seen here, power adaptive wireless transmitting system of the present invention and method has the following advantages and remarkable result:
1), the present invention achieves by the energy requirement of the nerve micro-stimulus device predicting vision prosthesis the transmitting power regulating wireless transmission adaptively according to the data encoding of image, both the power consumption of implanted vision prosthesis had been met in real time, dynamically reduce energy consumption again, thus improve the effective utility of laser power of vision prosthesis, its external cell being more suitable for portable system application is powered;
2), power adaptive wireless transmitting system of the present invention and method thereof, can the electromagnetic radiation of the organism at power adaptive wireless transmitting system placement location place of the present invention local be dropped to minimum, thus be conducive to reducing carrying for a long time the electromagnetic radiation damage that implanted vision prosthesis causes.
Be described further below with reference to the technique effect of accompanying drawing to design of the present invention, concrete structure and generation, to understand object of the present invention, characteristic sum effect fully.
Accompanying drawing explanation
Fig. 1 is the structural representation of power adaptive wireless transmitting system of the present invention in vision prosthesis, and figure comprises the arrow of the data flow indicating each intermodule.
Fig. 2 is the circuit diagram of the regulated power supply of power adaptive wireless transmitting system of the present invention.
Fig. 3 is the flow chart (outer body) using power adaptive radio transmitting method of the present invention.
Detailed description of the invention
As shown in Figure 1, in one embodiment of the invention, power adaptive wireless transmitting system of the present invention comprises stimulator power prediction and adjustment module 40, signal madulation module 30, radiofrequency emitting module 50, Receiver Module 60, energy recovery module 70 and data demodulation module 80.Wherein, the stimulator power prediction of power adaptive wireless transmitting system of the present invention and adjustment module 40, signal madulation module 30 and radiofrequency emitting module 50, outside human body, are the outer bodies of power adaptive wireless transmitting system of the present invention; The Receiver Module 60 of power adaptive wireless transmitting system of the present invention, energy recovery module 70 and data demodulation module 80 within human body, be power adaptive wireless transmitting system of the present invention body in part.Data between the outer body of power adaptive wireless transmitting system of the present invention and inner point of body and the wireless transmit being conveyed through radiofrequency emitting module 50 and Receiver Module 60 of energy realize with receiving.
Power adaptive wireless transmitting system stimulator power prediction of the present invention and adjustment module 40 and signal madulation module 30 are connected respectively to image procossing and the coding module 20 of vision prosthesis.Stimulator power prediction and adjustment module 40 process through image procossing and coding module 20 data encoding obtained predict that the institute energy requirement of nerve micro-stimulus device 90 according to this data encoding work is to determine the transmitting power of radiofrequency emitting module 50 for the images that gather according to the image capture module 10 of vision prosthesis.Stimulator power prediction and adjustment module 40 are also for predicting that it completes the required time of the transmitting power regulating radiofrequency emitting module 50.Signal madulation module 30 processes through image procossing and coding module 20 data encoding obtained for modulating, and the modulation format of employing is ASK modulation.
The radiofrequency emitting module 50 of power adaptive wireless transmitting system of the present invention comprises E power-like amplifier 53, regulated power supply 51 and square-wave generator 52, and regulated power supply 51 and square-wave generator 52 are connected respectively to E power-like amplifier 53.E power-like amplifier 53 comprises metal-oxide-semiconductor 55 and transmitting coil 54.Wherein, metal-oxide-semiconductor 55 is speed-sensitive switch metal-oxide-semiconductor, and transmitting coil 54 is the insulation litz wire of multiturn or the plane thread type coil of enamel covered wire.Stimulator power prediction and adjustment module 40 are connected to regulated power supply 51, by predicting the output voltage of energy adjustment regulated power supply 51 needed for the nerve micro-stimulus device 90 that obtains by it, thus regulate the transmitting power of radiofrequency emitting module 50.Signal madulation module 30 is connected to regulated power supply 51, stimulator power prediction and adjustment module 40 predict complete the required time of the transmitting power regulating radiofrequency emitting module 50 after, with the Signal Regulation regulated power supply 51 of data encoding exported to obtain corresponding output voltage, thus realize modulating the ASK of data encoding.The transmitting coil 54 of radiofrequency emitting module 50, under the excitation of suitable transmitting power, is launched wirelessly by through the data encoding of ovennodulation and institute's energy requirement of nerve micro-stimulus device 90.In the present embodiment, the parameter of the wireless transmission of radiofrequency emitting module 50 is: carrier frequency 10MHz, data transmission rate 500Kbps.
The Receiver Module 60 of power adaptive wireless transmitting system of the present invention is connected respectively to energy recovery module 70 and data demodulation module 80, it comprises receiving coil 61, and receiving coil 61 is the insulation litz wire of multiturn or the plane thread type coil of enamel covered wire.By receiving coil 61, institute's energy requirement of Receiver Module 60 data encoding through ovennodulation that sends out of received RF transmitter module 50 and nerve micro-stimulus device 90 wirelessly, and the data encoding through ovennodulation is wherein sent to data demodulation module 80 to carry out demodulation to it, institute's energy requirement of nerve micro-stimulus device 90 is sent to energy recovery module 70 and thinks that nerve micro-stimulus device 90 provides this energy requirement.Energy recovery module 70 comprises full-bridge rectifier, filter capacitor and manostat, recovers burning voltage, for nerve micro-stimulus device 90 provides energy in the wireless transmission waveform that receives from it.
The energy recovery module 70 of power adaptive wireless transmitting system of the present invention and data demodulation module 80 are connected respectively to the nerve micro-stimulus device 90 of vision prosthesis.Energy recovery module 70 is for providing energy for nerve micro-stimulus device 90, and data demodulation module 80 sends the data encoding completing demodulation to nerve micro-stimulus device 90.Like this, nerve micro-stimulus device 90 can carry out electricity irritation according to this data encoding to optic nerve, produces visual hallucination to make the visual cortex of patient.
In the present embodiment, regulated power supply 51 adopts circuit structure as shown in Figure 2.Regulated power supply 51 comprises digital interface 1, low pressure difference linear voltage regulator 2, divider resistance R
0and multiple controlled partial pressure unit, such as controlled partial pressure unit 3.For controlled partial pressure unit 3, it comprises resistance R
0, semifixed resistor R
vwith audion T, other the controlled partial pressure unit in regulated power supply 51 all has identical circuit structure with controlled partial pressure unit 3, but resistance is wherein different with the resistance value of semifixed resistor.This multiple controlled partial pressure unit is connected between digital interface 1 and low pressure difference linear voltage regulator 2 with the form be connected in parallel to each other.Stimulator power prediction and adjustment module 40 are connected to the digital interface 1 of regulated power supply 51, send digital control signal to regulate regulated power supply 51 to it.Stimulator power prediction is converted to multiple voltage control signal (its number is equal with the number of the controlled partial pressure unit contained by regulated power supply 51) with the digital control signal that adjustment module 40 sends by digital interface 1, these multiple voltage control signals access the base stage of the audion in multiple controlled partial pressure unit respectively, to control the break-make of audion thus to control the shunt whether conducting at this controlled partial pressure unit place.The digital control signal that the present embodiment moderate stimulation device power prediction and adjustment module 40 send can not make the place of two and plural controlled partial pressure unit be in the state of conducting along separate routes simultaneously.For controlled partial pressure unit 3, when the digital control signal that stimulator power prediction and adjustment module 40 send makes the shunt conducting at its place, the shunt at other controlled partial pressure unit place is all in the state of disconnection, can calculate the output voltage V of now regulated power supply 51
outfor:
V
out≈V
ref×[(R
1+R
v)/R
0+1]
Wherein, V
reffor the nominal reference voltage of low pressure difference linear voltage regulator 2.Regulated power supply 51 can connect external portable regulated power supply at its input provides input voltage V for it
in.
As shown in Figure 2, in the present embodiment, the work employing the vision prosthesis of power adaptive wireless transmitting system of the present invention comprises the following steps (only relating to outer body):
Step 101, collection image.
The image capture module 10 of vision prosthesis gathers target image, and frame frequency used is more than 25Hz, and the image obtained is digital picture.
Step 102, automatic calibration.
The image obtained in step 101 is carried out automatic straightening by the image capture module 10 of vision prosthesis, is then sent to image procossing and the coding module 20 of vision prosthesis.
Step 103, low pixelation process.
Image procossing and coding module 20 apply the image received in minimal information amount strategy treatment step 102, obtain the low pixelation image corresponding with the stimulation channels number of the nerve micro-stimulus device 90 of vision prosthesis.
Step 104, low gray level process.
The image obtained in step 103 is carried out low gray level process by image procossing and coding module 20.
Step 105, passage gating are encoded.
Image procossing and coding module 20 are according to each pixel of the image obtained in step 103, and the passage gating of each stimulation channels of establishment nerve micro-stimulus device 90 is encoded.
Step 106, current parameters are encoded.
Image procossing and coding module 20, according to the gray value of each pixel of the image obtained in step 104, calculate stimulating current amplitude, frequency that each stimulation channels of nerve micro-stimulus device 90 is corresponding, and work out the current parameters coding of each stimulation channels thus.
Step 107, predicted power demand.
The impedance of the stimulating electrode of stimulator power prediction and adjustment module 40 are encoded according to the passage gating of each stimulation channels of the nerve micro-stimulus device 90 obtained in step 105 and step 106 and current parameters is encoded (both are referred to as data encoding) and nerve micro-stimulus device 90, prediction nerve micro-stimulus device 90 is according to institute's energy requirement of above-mentioned data encoding work.In step below, stimulator power prediction and adjustment module 40 are by the transmitting power of energy adjustment radiofrequency emitting module 50 needed for this.
Step 108, prediction regulating time.
Stimulator power prediction and adjustment module 40 predict that it completes the time needed for transmission power adjustment.
Step 109, adjustment transmitting power.
Stimulator power prediction and adjustment module 40 send digital control signal to regulate the transmitting power of radiofrequency emitting module 50 to the regulated power supply 51 of radiofrequency emitting module 50, and require to complete adjustment within time of obtaining in step 108.
Step 110, transmission data encoding.
The data encoding that step 105 and step 106 obtain by signal madulation module 30 carries out ASK modulation, and radiofrequency emitting module 50 sends this data encoding through ovennodulation wirelessly.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all those skilled in the art, all should by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (9)
1. a power adaptive wireless transmitting system, for vision prosthesis, it is characterized in that, comprise image procossing and coding module, stimulator power prediction and adjustment module, signal madulation module, radiofrequency emitting module, Receiver Module, energy recovery module and data demodulation module; Described stimulator power prediction and adjustment module, described signal madulation module and described radiofrequency emitting module are outer bodies; Described Receiver Module, described energy recovery module and described data demodulation module are parts in body, and the wireless transmit being conveyed through described radiofrequency emitting module and described Receiver Module and the reception of data between the two and energy realize; Described image procossing and coding module are used for carrying out low pixelation process and low gray level process to the image gathered, and each pixel of image according to low pixelation process, establishment passage gating coding, according to the gray value of each pixel of the image of low pixelation process and low gray level process, establishment current parameters coding; Data encoding comprises described passage gating coding and described current parameters coding; Described stimulator power prediction and adjustment module are used for predicting that the institute energy requirement of the nerve micro-stimulus device of described vision prosthesis according to described data encoding work is to determine the transmitting power of described radiofrequency emitting module according to described data encoding, and for regulating the described transmitting power of described radiofrequency emitting module; Described signal madulation module for modulate described data encoding and radiofrequency emitting module described in instruction by through the described data encoding of described modulation and described required power transfer to described Receiver Module, described Receiver Module is used for the described described data encoding through ovennodulation received being sent to described data demodulation module and thinks that described nerve micro-stimulus device provides energy to carry out demodulation and the described institute energy requirement of reception is sent to described energy recovery module.
2. power adaptive wireless transmitting system as claimed in claim 1, wherein said stimulator power prediction and adjustment module predict that it completes the time of the described adjustment to described transmitting power, and described in described signal madulation module instruction, radiofrequency emitting module completes described transmission after the described time.
3. power adaptive wireless transmitting system as claimed in claim 2, wherein said radiofrequency emitting module comprises E power-like amplifier, regulated power supply and square-wave generator; Described stimulator power prediction and the described transmitting power of adjustment module by regulating the output voltage of described regulated power supply to control described radiofrequency emitting module.
4. power adaptive wireless transmitting system as claimed in claim 3, wherein said regulated power supply comprises the controlled partial pressure unit of multiple parallel connection, described stimulator power prediction and adjustment module make the shunt conducting at a place in described multiple controlled partial pressure unit by sending digital control signal and the shunt at other controlled partial pressure unit place are all disconnected, to control the described output voltage of described regulated power supply.
5. power adaptive wireless transmitting system as claimed in claim 4, wherein said E power-like amplifier comprises metal-oxide-semiconductor and transmitting coil.
6. power adaptive wireless transmitting system as claimed in claim 4, wherein said Receiver Module comprises receiving coil.
7. the power adaptive wireless transmitting system as described in claim 5 or 6, wherein said transmitting coil and receiving coil are all plane thread type coil.
8. power adaptive wireless transmitting system as claimed in claim 7, wherein said plane thread type coil is the coil of insulation litz wire of multiturn or the coil of the enamel covered wire of multiturn.
9. a power adaptive radio transmitting method, for vision prosthesis, it is characterized in that, comprise step: image procossing and coding module carry out low pixelation process and low gray level process to the image gathered, and each pixel of image according to low pixelation process, establishment passage gating coding, according to the gray value of each pixel of the image of low pixelation process and low gray level process, establishment current parameters coding; Data encoding comprises described passage gating coding and described current parameters coding; Described data encoding is sent to stimulator power prediction and adjustment module; According to described data encoding, described stimulator power prediction and adjustment module predict that the institute energy requirement of the nerve micro-stimulus device of described vision prosthesis according to described data encoding work is to determine the transmitting power of radiofrequency emitting module; Described stimulator power prediction and adjustment module predict that it completes the time of the described transmitting power regulating described radiofrequency emitting module; Described stimulator power prediction and the described transmitting power of adjustment module to described radiofrequency emitting module carry out described adjustment; Signal madulation module modulates described data encoding and instruction radiofrequency emitting module completes described transmission by through the described data encoding of described modulation and described required power transfer to the Receiver Module of described vision prosthesis after the described time; The described described data encoding through ovennodulation received is sent to data demodulation module with the described data encoding of demodulation through described modulation by described Receiver Module, and the described institute energy requirement received is sent to energy recovery module and thinks that described nerve micro-stimulus device provides energy.
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| CN103272329B (en) * | 2013-05-06 | 2015-05-20 | 上海交通大学 | Artificial vision prosthetic device with wireless energy transmission function |
| CN103816006B (en) * | 2014-02-20 | 2016-01-20 | 深圳市上示科技有限公司 | The equipment that a kind of non-implantable excites blind visual to experience through body surface |
| CN109675193B (en) * | 2017-12-29 | 2019-11-08 | 深圳硅基仿生科技有限公司 | Radio-frequency signal detection device and retina stimulator |
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| US6415184B1 (en) * | 1999-01-06 | 2002-07-02 | Ball Semiconductor, Inc. | Implantable neuro-stimulator with ball implant |
| CN1868555A (en) * | 2006-04-13 | 2006-11-29 | 上海交通大学 | Implanted type programmable nervus stimulator |
| CN1897471A (en) * | 2006-06-22 | 2007-01-17 | 上海交通大学 | Radio-frequency telcommunication device of implant nervous excitor |
| CN101239008A (en) * | 2008-03-06 | 2008-08-13 | 上海交通大学 | Visual sense prosthesis image processing device and method |
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|---|---|---|---|---|
| US6415184B1 (en) * | 1999-01-06 | 2002-07-02 | Ball Semiconductor, Inc. | Implantable neuro-stimulator with ball implant |
| CN1868555A (en) * | 2006-04-13 | 2006-11-29 | 上海交通大学 | Implanted type programmable nervus stimulator |
| CN1897471A (en) * | 2006-06-22 | 2007-01-17 | 上海交通大学 | Radio-frequency telcommunication device of implant nervous excitor |
| CN101239008A (en) * | 2008-03-06 | 2008-08-13 | 上海交通大学 | Visual sense prosthesis image processing device and method |
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