Artificial Vision System for the Blind using Ultra Sonic Wave transmission reception
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16-03-2010, 07:32 AM



.doc   Artificial Vision System for the Blind using Ultra Sonic Wave transmission reception techniques.doc (Size: 35 KB / Downloads: 477)

Artificial Vision System for the Blind using Ultra Sonic Wave transmission reception techniques
Abstrct:
The various systems have been developed to help blind individuals orienting in the surround space. The range of these systems is very wide and stretches from the simplest, inexpensive devices to the complex, multi-component vision systems which transforming the optical camera images into electric signals and transmit them to the cerebral cortex via implanted electrodes. However, these systems are very complex, expensive and are seldom used. The dedicated ultrasound range finders are more popular. The existing range finders measure the distance to the object using ultrasound beam and represent it via variable tone sound signals.
This approach has limitations because the individual must remember the lookup table between sound tone and the distance. In addition, these range finders are incapable of detecting moving objects such as cars or people which reduce safety. This contest entry describes the vision system which helps the blind orientating in the surround space. As contrasted to existing systems, the proposed device combines the usefulness, simplicity to use together with low cost. Device measures the distance to the object and visualizes the measurement results as special slider position which can be easily touched by blind people. Moreover, the device estimates the neighbored objects speed using Doppler Effect and generates the proportional to the objects speed number of sound signals. As result, the blind individual with the proposed system can travel efficiently and safely.
The system consist of the ultrasound transmitter TX and receiver RX, the CPU-controlled carrier generator to form the ultrasound carrier signal, the transmitter driver to amplify the carrier signal to the piezoelectric transmitter acceptable levels, the signal mixer to select the Doppler frequency shift during speed measurements, synchronous rectifier to rectify the incoming signal during distance measurements, multiplexer, low-pass filter to suppress the high-frequency mixer/rectifier products, analog-to-digital converter (ADC), CPU for system control, an buzzer and the slider stepper motor driver with motor.
Tools Used:
AT89S51 Microcontroller
Keil C compiler
Orcad circuit Design
Languages: Embedded C, VB6.0
Block Diagram
Use Search at http://topicideas.net/search.php wisely To Get Information About Project Topic and Seminar ideas with report/source code along pdf and ppt presenaion
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#2
26-11-2010, 11:45 AM


.ppt   Artificial_Vision.ppt (Size: 976 KB / Downloads: 313)
Presented by:R. Angeline Prabha & J.Lavina Mary
FINAL ECE
JACSI COLLEGE OF ENGG.
NAZARETH
ARTIFICIAL VISION
(Towards Creating the Joys of Seeing for the BLIND)



INTRODUCTION

Artificial vision researchers take inspiration by cochlear implant, which restored hearing to deaf people.

The EYE is the most important organ of human body,but vision system is complicated.


Role of RETINA

Scattered light from the object enters through the CORNEA.
The light is project and implimentationed onto the RETINA.
The retina sends messages to the brain through the OPTIC NERVE.
The BRAIN interprets what the object is.


HOW TO CREATE ARTIFICIAL VISION?

It could be achieved by stimulating the nerve GANGLIA behind the retina with an electrical current.
This helps to function the nerves behind the retina even the retina had degenerated.
For this we have to create a device that translates the images and electrical pulses that could restore the vision.


Concept for MICROCHIP
Small enough to be implanted
in the eye.
Supplied with a continuous
source of power.
Biocompatible with the
surrounding eye tissue.


How ASR does works?
ASR contains microscopic solar cells which convert light into electric pulses.
To implant this three tiny incisions are made in the part of the eye.
The most interesting thing in the ASR is that it takes the power needed from the light entering the eye.
The currently developing device is artificial retina component chip(ARCC).


Operations

The main parts are

Signal processor
Miniature video camera
Brain implants
Pinhole camera captures the scene & sends to a small computer.
Processor translates the image into series of signals that the brain can understand.
Brain implants recognize the image



What blind patients would not be able to use this device?

We believe the device will be applicable to virtually all patients who are blind or who have very low vision.
The only ones contraindicated would be a few blinded by serious brain damage, or who have chronic infections, etc. that preclude surgical implants.
Patients who have a small amount of vision are not contraindicated.
Visual cortex stimulation seems to work the same in both sighted and blind patients.

Advancement
Transudation
Sub-Retinal Prosthesis
Cortical prosthesis
Bio Hybrid Implant

Bottlenecks :
COST:The rate is higher depending upon the context and severity.
It may not work for people blinded as children or as infants.
It does not work as well as the real eye and does not have crystal-clear vision.

CONCLUSION

The electronic eye is the latest in high-tech gadgets aimed at helping millions of blind and visually impaired people. This helps the challenged people to walk safely and read large letters. In recent years, progress is being made towards sensory distribution devices for the blind.
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uma0732
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#3
10-12-2010, 07:39 PM

can i get full project and implimentation report of these.if i please send it to my mail id uma0732@gmail.com.now iam in the hurryup to do my final year project and implimentation.
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13-12-2010, 01:35 PM

hello
download the attachment from above post please
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uma0732
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13-12-2010, 02:00 PM

thanks..i have got an idea about the topic. thanks for seminar and presentationproject and implimentations.com and the person who have posted it.
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23-12-2010, 01:27 PM

PAPER SUBMITTED BY:
B.V.KRISHNAKOWSIC
N.NAVEENKUMAR



.doc   15-Artificial Vision.doc.doc (Size: 186 KB / Downloads: 105)


ABSTRACT:
Blindness is more feared by the public than any other ailment. Artificial vision for the blind was once the stuff of science fiction. But now, a limited form of artificial vision is a reality .Now we are at the beginning of the end of blindness with this type of technology. In an effort to illuminate the perpetually dark world of the blind, researchers are turning to technology. They are investigating several electronic-based strategies designed to bypass various defects or missing links along the brain's image processing pathway and provide some form of artificial sight.
This paper is about curing blindness. Linking electronics and biotechnology, the scientists has made the commitment to the development of technology that will provide or restore vision for the visually impaired around the world. This paper describes the development of artificial vision system, which cures blindness to some extent. This paper explains the process involved in it and explains the concepts of artificial silicon retina, cortical implants etc. The roadblocks that are created are also elucidated clearly. Finally the advancements made in this system and scope of this in the future is also presented clearly.

INTRODUCTION:
Artificial-vision researchers take inspiration from another device, the cochlear implant, which has successfully restored hearing to thousands of deaf people. But the human vision system is far more complicated than that of hearing. The eye is one of the most amazing organs in the body. Before we understand how artificial vision is created, it's important to know about the important role that the retina plays in how we see. Here is a simple explanation of what happens when we look at an object:
• Scattered light from the object enters through the cornea.
• The light is project and implimentationed onto the retina.
• The retina sends messages to the brain through the optic nerve.
• The brain interprets what the object is.

The retina is complex in itself. This thin membrane at the back of the eye is a vital part of our ability to see. Its main function is to receive and transmit images to the brain. These are the three main types of cells in the eye that help perform this function: Rods, Cones and Ganglion Cells. The information received by the rods and cones are transmitted to the nearly 1 million ganglion cells in the retina. These ganglion cells interpret the messages from the rods and cones and send the information on to the brain by way of the optic nerve. There are a number of retinal diseases that attack these cells, which can lead to blindness. The most notable of these diseases are retinitis pigmentosa and age-related macular degeneration. Both of these diseases attack the retina, rendering the rods and cones inoperative, causing either loss of peripheral vision or total blindness. However, it's been found that neither of these retinal diseases affects the ganglion cells or the optic nerve. This means that if scientists can develop artificial cones and rods, information could still be sent to the brain for interpretation. This concept laid the foundation for the invention of the ARTIFICIAL VISION SYSTEM technology.

HOW TO CREATE ARTIFICIAL VISION?
The current path that scientists are taking to create artificial vision received a jolt in 1988, when Dr. Mark Humayun demonstrated that a blind person could be made to see light by stimulating the nerve ganglia behind the retina with an electrical current. This test proved that the nerves behind the retina still functioned even when the retina had degenerated. Based on this information, scientists set out to create a device that could translate images and electrical pulses that could restore vision. Today, such a device is very close to be available to the millions of people who have lost their vision to retinal disease. In fact, there are at least two silicon microchip devices that are being developed. The concept for both devices is similar, with each being:
• Small enough to be implanted in the eye
• Supplied with a continuous source of power
• Biocompatible with the surrounding eye tissue

Perhaps the most promising of these two silicon devices is the ARTIFICIAL SILICON RETINA (ASR). The ASR is an extremely tiny device. It has a diameter of just 2 mm (.078 inch) and is thinner than a human hair. In order for an artificial retina to work it has to be small enough so that doctors can transplant it in the eye without damaging the other structures within the eye. Groups of researchers have found that blind people can see spots of light when electrical currents stimulate cells, following the experimental insertion of an electrode device near or into their retina. Some patients even saw crude shapes in the form of these light spots. This indicates that despite damage to cells in the retina, electronic techniques can transmit signals to the next step in the pathway and provide some form of visual sensation. Researchers are currently developing more sophisticated computer chips with the hope that they will be able to transmit more meaningful images to the brain.

How does ARTIFICIAL SILICON RETINA works?
The ASR contains about 3,500 microscopic solar cells that are able to convert light into electrical pulses, mimicking the function of cones and rods. To implant this device into the eye, surgeons make three tiny incisions no larger than the diameter of a needle in the white part of the eye. Through these incisions, the surgeons introduce a miniature cutting and vacuuming device that removes the gel in the middle of the eye and replaces it with saline. Next, a pinpoint opening is made in the retina through which they inject fluid to lift up a portion of the retina from the back of the eye, which creates a small pocket in the sub retinal space for the device to fit in. The retina is then resealed over the ASR.
For any microchip to work it needs power, and the amazing thing about the ASR is that it receives all of its needed power from the light entering the eye. This means that with the ASR implant in place behind the retina, it receives all of the light entering the eye. This solar energy eliminates the need for any wires, batteries or other secondary devices to supply power.
Another microchip device that would restore partial vision is currently in development called the artificial retina component chip (ARCC), this device is quite similar to the ASR. Both are made of silicon and both are powered by solar energy. The ARCC is also a very small device measuring 2 mm square and a thickness of .02 millimeters (.00078 inch). There are significant differences between the devices, however. According to researchers, the ARCC will give blind patients the ability to see 10 by 10 pixel images, which is about the size of a single letter on this page. However, researchers have said that they could eventually develop a version of the chip that would allow 250 by 250 pixel array, which would allow those who were once blind to read a newspaper.

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31-03-2011, 12:20 PM

PRESENTED BY
A.SRIKANTH
D.PAVAN


.doc   AI16.doc (Size: 228.5 KB / Downloads: 48)
ABSTRACT
Blindness is more feared by the public than any other ailment. Artificial vision for the blind was once the stuff of science fiction. But now, a limited form of artificial vision is a reality .Now we are at the beginning of the end of blindness with this type of technology. In an effort to illuminate the perpetually dark world of the blind, researchers are turning to technology. They are investigating several electronic-based strategies designed to bypass various defects or missing links along the brain's image processing pathway and provide some form of artificial sight.
This paper is about curing blindness. Linking electronics and biotechnology, the scientists has made the commitment to the development of technology that will provide or restore vision for the visually impaired around the world. This paper describes the development of artificial vision system, which cures blindness to some extent. This paper explains the process involved in it and explains the concepts of artificial silicon retina, cortical implants etc. The roadblocks that are created are also elucidated clearly. Finally the advancements made in this system and scope of this in the future is also presented clearly.
INTRODUCTION:
Artificial-vision researchers take inspiration from another device, the cochlear implant, which has successfully restored hearing to thousands of deaf people. But the human vision system is far more complicated than that of hearing. The eye is one of the most amazing organs in the body. Before we understand how artificial vision is created, it's important to know about the important role that the retina plays in how we see. Here is a simple explanation of what happens when we look at an object:
• Scattered light from the object enters through the cornea.
• The light is project and implimentationed onto the retina.
• The retina sends messages to the brain through the optic nerve.
• The brain interprets what the object is.
The retina is complex in itself. This thin membrane at the back of the eye is a vital part of our ability to see. Its main function is to receive and transmit images to the brain. These are the three main types of cells in the eye that help perform this function: Rods, Cones and Ganglion Cells. The information received by the rods and cones are transmitted to the nearly 1 million ganglion cells in the retina. These ganglion cells interpret the messages from the rods and cones and send the information on to the brain by way of the optic nerve. There are a number of retinal diseases that attack these cells, which can lead to blindness. The most notable of these diseases are retinitis pigmentosa and age-related macular degeneration. Both of these diseases attack the retina, rendering the rods and cones inoperative, causing either loss of peripheral vision or total blindness. However, it's been found that neither of these retinal diseases affects the ganglion cells or the optic nerve. This means that if scientists can develop artificial cones and rods, information could still be sent to the brain for interpretation. This concept laid the foundation for the invention of the ARTIFICIAL VISION SYSTEM technology.
HOW TO CREATE ARTIFICIAL VISION?
The current path that scientists are taking to create artificial vision received a jolt in 1988, when Dr. Mark Humayun demonstrated that a blind person could be made to see light by stimulating the nerve ganglia behind the retina with an electrical current. This test proved that the nerves behind the retina still functioned even when the retina had degenerated. Based on this information, scientists set out to create a device that could translate images and electrical pulses that could restore vision. Today, such a device is very close to be available to the millions of people who have lost their vision to retinal disease. In fact, there are at least two silicon microchip devices that are being developed. The concept for both devices is similar, with each being:
• Small enough to be implanted in the eye
• Supplied with a continuous source of power
• Biocompatible with the surrounding eye tissue
Perhaps the most promising of these two silicon devices is the ARTIFICIAL SILICON RETINA (ASR). The ASR is an extremely tiny device. It has a diameter of just 2 mm (.078 inch) and is thinner than a human hair. In order for an artificial retina to work it has to be small enough so that doctors can transplant it in the eye without damaging the other structures within the eye. Groups of researchers have found that blind people can see spots of light when electrical currents stimulate cells, following the experimental insertion of an electrode device near or into their retina. Some patients even saw crude shapes in the form of these light spots. This indicates that despite damage to cells in the retina, electronic techniques can transmit signals to the next step in the pathway and provide some form of visual sensation. Researchers are currently developing more sophisticated computer chips with the hope that they will be able to transmit more meaningful images to the brain.
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30-07-2011, 10:38 AM


.docx   ABSTRACTFOR BLIND.docx (Size: 227.95 KB / Downloads: 37)
The various systems have been developed to help blind individuals orienting in the surround space, The range of these systems is very wide and stretches from the simplest, inexpensive devices to the complex, multi-component vision systems which transforming the optical camera images into electric signals and transmit them to the cerebral cortex via implanted electrodes. However, these systems are very complex, expensive and are seldom used. The dedicated ultrasonic sensor is reflecting signals for long range nearly 2 meters. While receiving the reflected signal which gives digital output by taking this output to the microcontroller we can Access the voice through voice ic APR9600.By accessing the voice blind people can easily find out the obstacles which are in front of them
The system consist of the ultrasound transmitter TX and receiver RX, the CPU-controlled carrier generator to form the ultrasound carrier signal, the transmitter driver to amplify the carrier signal to the piezoelectric transmitter acceptable levels, the signal mixer to select the Doppler frequency shift during speed measurements, synchronous rectifier to rectify the incoming signal low-pass filter to suppress the high frequency mixer/rectifier products, CPU for system control.
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09-10-2011, 09:10 PM

i want the project and implimentation report for Artificial Vision System for the Blind using Ultra Sonic Wave transmission reception techniques send me
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10-10-2011, 09:53 AM



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