Vision Definition and 120 Threads

Hello, I started this topic to discuss interesting new night vision technology that was presented on TED talks. Old, expensive and bulky IR (or other light spectrum) IIT amplifier could be replaced with very thin OLED based, cheaper and low power consuming image intensifier which was developed...

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?

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...

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...

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.

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...

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...

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...

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?

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...

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...

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...

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

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...

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.

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...

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...

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

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...

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...

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.

hi everybody... are there any difference between: image processing and 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...

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...

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.

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...

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...

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?

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?

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...

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...

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...

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...

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...

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...

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.

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...

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!

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.

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...

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...

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...

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...

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...

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...

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...

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!

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...

My textbook states that if something i am looking at disappears for 0.1 second and appear again, I'll not able to perceive that it was not there for some moments. When an object build an image in my brain, the sense of vision lasts for one-tenth of a second. Doesn't it imply that if any other...

1) How powerful is the human eye at discerning differences in light? (in a completely dark room could you make out one photon, how much light needs to emanate from a single point to be visable, how close of an angle must separate beams of light be projected in order to appear seamless to the...