What is Vision: Definition and 123 Discussions

VisiCorp Visi On was a short-lived but influential graphical user interface-based operating environment program for IBM compatible personal computers running MS-DOS. Although Visi On was never popular, as it had steep minimum system requirements for its day, it was a major influence on the later development of Microsoft Windows.

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  1. I

    Why do electronic display screens make my vision blurry?

    what is intrinsically different about the light coming from electronic display screens vs the light everywhere else (light from the environment)? perhaps.. the brightness? but that shouldn't cause blurry vision. this deals with focuses.. anyone have any suggestions as to why this might be?
  2. J

    Computer Vision - Ground plane position based on image point

    When given an image of a scene of something like a hallway or road (looking down this hallway or road) a vanishing point can be determined. Also, the points on the image must lie on a certain line in the real world environment given by: x_{im} = f\frac{X}{Z} and y_{im} = f\frac{Y}{Z} where...
  3. G

    'Fast forward' vision when travelling towards a star?

    If we would ever travel to another star, say Sirius roughly 9 light years away, at 0,1 c the travel would take 90 years. Since the Sirius we see today from Earth is the Sirius of 9 years ago and the Sirius we would see on arrival would be the Sirius of 90 years from now, this means that in an...
  4. fluidistic

    Why Can't Flies See a Slowly Approaching Finger Despite Their Excellent Vision?

    I've searched a bit in google about the vision of the common housefly but most studies are on the drosophilia. First, am I right thinking that they see in 2 dimensions rather than 3? Because to see in 3 dimensions would require a somehow large distance between the extremum of their "eyes" and...
  5. K

    How Do Photons Initiate the Process of Vision?

    Photon help please -- how does vision work? how does a photon of activate the molecular pathways that lead to “vision”? Need help asap can't find anything on this.
  6. M

    The role of refraction in vision

    I read the following in a book. “In order for there to be a clear image on your retina, the eye must refract the light rays. About two thirds of the refraction occurs at the surface of the eye. If water is on the eye, nearly all of the refraction is lost because the refractive index of the...
  7. phion

    How Does Marissa Mayer Inspire Vision and Innovation at Yahoo?

    I've been following Marissa Mayer, the new CEO of Yahoo!, for quite some time now. I think she's magnificent, brilliant, and sexy. In a recent article she talks about the importance of internalizing a common vision and the acquisition of new ideas. Much of what she talks about can be found in...
  8. T

    Computer Vision: What Engineering Field to Study?

    I'm first year ENG at a Canadian university where first year is general for all engineers. Next year I get to pick a field to specialize in. I'm really interested in computer vision, for example a system that could track a moving target or something. I Know this is crazy complicated but I'm...
  9. H

    Infra red and ultra violet vision

    I heard that snakes can see infra red waves and e.g. bees can see ultra violet light. so... infra red = heat = snakes have heat vision? and do bees see ultra violet as a color? if yes, does it mix with other colors or is it like a filter?
  10. D

    Interesting experiment with night vision IR scope

    I have a hand held night vision scope (Russian made I suspect.) Came with a small Solid State IR "lamp." The IR source is separate and battery powered. It has a built in hand operated charger that you squeeze several times and it will hold a "charge" on the sensor for a while and then...
  11. M

    Medical Understanding Vision Inversion: The Myth and Meaning Behind It

    I could have put this in the biology forum, but decided it has too strong a philosophical slant (as my questions always seem to). I recently read that the experiment where people who wore vision-inverting glasses having there vision eventually flip is a myth. This reminded me of a question I...
  12. W

    Do We Live in Matter or in Our Vision of Matter?

    We do not live in matter, we live in our vision of it. Else we would have known matter instinctively. We live through our vision of the world, and this vision is immaterial. Matter, however, is existent. If we humans were originally material we wouldn’t need to study the laws of matter. We...
  13. G

    Night Vision Goggles: Explained + Density Effects

    Can somebody explain how night vision and/or a black light work? I know it does something where it enhances dark colors to an infrared light spectrum. Would the same concept work for object or fluid density? For example, if I was wearing this night vision goggles and see oil on the floor, will...
  14. M

    What is known about the processing of our vision and where can I learn about it?

    What is known of how our brain processes our vision and where can I learn about it?
  15. J

    Computer Vision Geometry - Collinear Points In A Pinhole Camera Model

    Homework Statement Prove that a line in 3D space is imaged to a line on the image plane in a pinhole camera model. Homework Equations A 3D point give by (X,Y,Z) will be imaged on the image plane at x = f(\frac{X}{Z}) and y = f(\frac{Y}{Z}) where f is the focal point. The Attempt at...
  16. C

    A Day Made of Glass (very intriguing vision of the near future)

    LINK1 LINK2 I bet we'll also have humanoid robots that are affordable (and bringing to the masses one of the few things only the wealthier have access to at the moment, i.e. servants/hired help), and also robotic cars that can drive themselves if you so desire it to.
  17. P

    Seeing the Unseen: Can You View Objects at Light Speed?

    ok first, as this is my first post i have to say I am a little intimidated by the scientific detail of most posts on this site as I am a laymen, no academic background, just very interested in science :) also as I've only just discovered this site I am very hard pressed to scroll all topics...
  18. P

    Robot vision distance sensing & launch tube design

    So, For FIRST FRC robotics, We have made 3 different objectives to research, and I decides to start with the projectile. We need to launch an 8" diameter foam basketball into a goal that's 18" diameter. We can be anywhere from 3feet to 54 feet away. We had an idea of using the classic...
  19. 4

    Bohm's Hidden Variable Model: Distinguishing from Einstein's Vision

    describe bohm's hidden variable model for quantum physics. what is the main feature that distinguishes it from Einstein's vision?
  20. J

    Vision in mind to become a scientist

    hello every1, From a very small age, i had a vision in mind to bcome a scientist, researching in physics. From time to time, Different parts of physics were adored by me. From cosmology, astronomy to quantum physics, I've always wanted to leave a mark in all of those fields. But when i...
  21. G

    Medical Why Can I See Inside a Cylinder with One Eye Closed?

    This may be a dumb question but I am curious about it and want to know if anyone can provide me a link or give an explanation to why this is. If I have a cylinder say like a cup and I put it over one eye I can only see the surroundings with my other eye that is not covered but if I close...
  22. N

    Computer Vision exam prep

    Homework Statement Hi! I'm preparing on some previous exam questions for a computer vision related course. Here are some questions I'm struggling with. 1. A general form of nonlinear diffusion scheme of an image I(r) can be represented as a Partial Differential Equation...
  23. B

    Seeking Computer Vision Source Code for Texture Analysis

    Dear All, I am working on digital image processing. I want to do texture analysis. I need computer vision source code. I could not find the source code. If you have these source code please share me.
  24. D

    Image Processing vs. Computer Vision

    hi everybody... are there any difference between: image processing and computer vision?
  25. T

    Does anyone have any experience with computer vision?

    Hello, first of all I want to say english isn't my primary language (I'm from Quebec), so I'm sorry if you have trouble understanding me. I will be attending university next year (I think this is what you guys call undergrad school in the US, with one less year since we have "CEGEP" between...
  26. N

    Medical Does the Same Lens Work for Different Vision Strengths?

    vision problem! who's right? http://img412.imageshack.us/img412/8756/55201759.gif I don't know if this is a stupid question but one day me and my friend were talking and we got into an argument about viewing a screen through a camera's phone and a phoropter with the same lense in both...
  27. G

    Where Can I Find Open Source Projects for Matching and Locating GUI Icons?

    Hello, I am looking for something that can match and locate icons/areas of a GUI from saved images. Could anyone point me toward any projects? Thanks.
  28. S

    Medical How does binocular vision work?

    Hello everyone, If we have 2 eyes how come we don't see 2 objects. Then I found the answer was binocular vision, and both eyes concentrate on the same spot. Now my question is does the brain make the 2 different angles into one object or it always happens? I mean does something have to be...
  29. R

    Light Polarization at the Beach: Understanding Sunbathers' Vision

    Homework Statement At a beach the light is generally partially polarized due to reflections off sand and water. At a particular beach on a particular day near sundown, the horizontal component of the electric field vector is 1.8 times the vertical component. A standing sunbather puts on...
  30. R

    Night Vision & Color Conversion

    isn't the frequency that is reflected back to a night vision device by a source at night correspond to a particular color? Which can then be converted back to its original color?
  31. Loren Booda

    Medical Uncovering the Mystery of Pixelated Night Vision: A Journey into the Dark

    After an hour in the dark of my bedroom, I still see points of light, like "snow" on a TV. Are these caused by present photons, the random firing of retinal cells, or lingering images?
  32. C

    Light and Vision: Photon Direction

    How is it that light disperses from a point source (like a pinhole w/ a light shining through). From my understanding, photons disperses in all directions at all angles. So than how is it that an eye can differentiate that point from all the other points light around it (say there was another...
  33. N

    Can Triangulation Solve My Computer Vision Problems with 2 Webcams?

    I am using 2 webcam to measure the distance and speed of an object. I am considering using triangulation methods but i am facing problems how to find the angle of each webcam to the object? Since we need 2 angle and the distance between 2 webcam to find the distance between webcam and the...
  34. M

    What is the cause of my peculiar vision abnormality?

    I have a peculiar vision abnormality. With or without one eye closed (either eye), I see a faint second image, shifted slightly above the normal image. It appears that when a ray of light hits the lens of my eye, it splits into two rays, one ray a fraction of a degree above the other one...
  35. F

    Do Passive Night Vision Scopes Exist Without Electronic Amplification?

    Has anyone ever created a monocular (or binocular) for the main purpose of simply gathering more light without much, if any, telephoto effect? A cursory google of it shows me nothing. I guess I'm surprised there aren't old WW2 surplus "passive night vision systems" out there that are simply lens...
  36. M

    After m.s in computer vision, should i go for industry or phd

    So recently i have been thinking about what to do after i graduate with my masters of science degree. I did my undergrad in electrical engineering at Penn State University, and stayed for a masters degree. My original motivation to get a masters was to take more classes in computer vision...
  37. N

    Vision statement on studentship application

    I'm trying to fill in an application for a scholarship to study medical physics. The instructions are thus: My goal is to eventually run my own lab and clinic (within about 15 years time frame), but I can't think of anything to write to make it more than about 5 lines, basically just...
  38. W

    Can Eye Exercises Improve Vision Without Glasses?

    Many people I know advice me that doing eye exercises will help improve my vision and if I do them for quite some time, that I will not need glasses any more. Is this true? When I google this, all I get are advertisements.
  39. L

    Computer Vision, Corners and Eigenvalues

    This question is about the use of eigenvalues in a specific application. The subject is Computer Vision and the topic is the Harris Corner detection method. The attached file is PDF document of slides that show the math in a bit more detail. In the slides, a corner is located by looking at...
  40. Z

    Does CV online- computer vision online 　down?

    Does "CV online- computer vision online"　down? hi, once , I think the cvonline ( computer vision online) http://homepages.inf.ed.ac.uk/rbf/CVonline/ is the best site about computer vision. But, I can't access it these days. Does anyone know whether the site is down? Thank you!
  41. DaveC426913

    Did I Ace the Color Vision Test?

    http://www.xrite.com/custom_page.aspx?PageID=77 I thought I got perfect. I am aghast to find I did poorly. I'm gonig to blame it on test conditions. I'll try it again under proper lighting and viewing conditions.
  42. marcus

    Wilczek's nonstring unification vision for LHC and beyond

    Frank Wilczek has brought out a book The Lightness of Being that is a perfect follow-up to Lee Smolin's The Trouble with Physics. Wilczek presents a vision of unification that is predicts phenomena at LHC energies, that is understandable and relevant in terms of today's experiments, and...
  43. marcus

    Frank Wilczek's Vision: Exploring Grid Theory & Quantum Gravity

    Frank Wilczek has presented a way of looking at the world which is curiously consonant with Lattice Quantum Gravity approaches a la Renate Loll, John Barrett, Lee Smolin, Carlo Rovelli and others. The world as lattice---what Wilczek calls the Grid. It is oddly reminiscent of spin networks...
  44. J

    Medical Losing vision in one eye and I have a crazy theory

    I'm still comparatively a young buck at 22, but I have been afflicted by a few things that don't show up for most people until much later in life. The one I would like to focus on is vision because it's the most annoying to me. I don't get checkups too often so as best as I can recall, I had...
  45. J

    Color vision, and seeing violet

    Visible light spectrum: http://upload.wikimedia.org/wikipedia/en/7/79/Spectrum4websiteEval.svg Wikipedia's article on color vision: http://en.wikipedia.org/wiki/Color_vision Response intensities for cone cells S,M,L: http://upload.wikimedia.org/wikipedia/en/1/1e/Cones_SMJ2_E.svg The way how...
  46. DaveC426913

    Medical Black Dot in Vision: What Is It?

    Lately I've noticed a black dot in the vision of my right eye (a few weeks now). I'm used to floaters, this is different - it's black. Other than that, it's much like a floater: it's out of focus and, while it seems to move around, I think that's just my eye movements (I don't see how it could...
  47. Greg Bernhardt

    Do HD Vision WrapArounds Really Live Up to Their Hype?

    These are sunglasses that claim to give you HD vision (whatever that means) and enchance your vision. Just saw a TV ad for them and it was ridiculous. How anyone could actually be inticed to buy these pieces of junk is beyond me. One lady in the ad claims they look like designer glasses, when...
  48. H

    I'm not sure what you're trying to say here. Could you clarify?

    I have told only those closest to me about this vision and they did not doubt me for a moment that this vision had occurred because of my non-beliefs. However, I do not feel this was supernatural, but scientific and physical. Perhaps someone could tell me what they think about it. Here goes...
  49. K

    Suffering from blurred vision and having headache

    Hi, I am suffering from blurred vision and often have headaches. I fear it is some transient disorder, but it could be something more serious. Can someone suggest me as to what to do? Your suggestion would be highly appreciated. Thanks!
  50. B

    Persistence of Vision: Intensity of Green Circle?

    Persistence of Vision! If you wave a 5mm bright green led in a circle fast enough you see a green circle (say you attach it to a bike wheel and spin the wheel). What will the intensity of that green circle be? Will the light intensity be smeared throughout the whole circumference of the...
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