Images Definition and 388 Threads

An image (from Latin: imago) is an artifact that depicts visual perception, such as a photograph or other two-dimensional picture, that resembles a subject—usually a physical object—and thus provides a depiction of it. In the context of signal processing, an image is a distributed amplitude of color(s). A pictorial script is a writing system that employs images as symbols for various semantic entities, rather than the abstract signs used by alphabets.

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  1. Amith2006

    Number of images formed by 3 mutually perpendicular plane mirrors

    Sir/Madam, 1)The 2 adjacent walls and the ceiling of a rectangular room are mirror surfaced.What is the number of images of himself does an observer sees? If it was the case of 2 mirrors I know it is 3. But here there are 3 mirrors which are mutually perpendicular. But if we take 2 mirrors at...
  2. P

    Question on what a Real and Virtual images are

    Hi I was wondering if somebody could kindly tell me what the difference between a real and a virtual image is. The way I which I know them apart is that in a real image the light rays actually intersect, while a virtual image the light rays diverge , thus never actually intersect. Is this...
  3. S

    Calculating Capacitance & Inductance of Cylindrical Conductors

    We have to find the capacitance and inductance of a pair of cylindrical conductors of radius r and at a distance d b away from each other. I get the following expressions C = 2Pi*epsilon0/ln(b/a) L = Mu0/2Pi *ln(b/a) We now have a cylindrical conductor a distance d above an infinite...
  4. D

    Are Images of Space Distorted by Gravity?

    I've seen images of space many times in the media. Do the images that we see acurately depict the universe? Or are the images so distorted by gravity that the true structure of the universe and various objects in it are not readily revealed?
  5. E

    Images under exp in complex plane

    Describe the image under exp of the line with equation y = x. To do this you should find an equation (at least parametrically) for the image (you can start with the parametric form x = t; y = t), plot it reasonably carefully, and explain what happens in the limits as t approaches infinity and t...
  6. Hootenanny

    LaTeX Inserting Images into a LaTeX Document on Windows With TeXnicCenter

    I've got an image, GIF, JPEG or other ( I can easily convert between most formats) and I want to insert it into a Latex document. Could someone please give me instructions on how to use this. I'm using TeXnicCenter on a Windows system.
  7. P

    What caused the strange doppler-radar images captured in these photos?

    Does anyone know what could have caused these kinds of doppler-radar images: http://img452.imageshack.us/img452/909/ind23br.gif More radar images of the same event: http://www.softspotopening.com/
  8. D

    LaTeX How Can I Increase the Contrast of LaTeX Images?

    Is there any way to make LaTeX images appear with more contrast when saved (in my case, as png, but jpeg and bmp are equally bland) and/or printed? Thank you.
  9. D

    Find Telescope Diameter to Resolve Two Stars

    I have two stars that are separated by an angle of 3x10^5 radians. They are both emitting monochromatic light on 600nm. I would like to find the diameter of the smallest telescope that can resolve the two stars. For the angular limit of resolution I have \Delta \theta = \frac{1.22...
  10. M

    Solving a Photographic Puzzle: Comparing Heights of Images at Varying Distances

    hey, i tried the following problem and i think i got it wrong well. here is the problem and what i did. problem A photograph of a zebra is taken from a distance of 100m with a 50mm lens. A second picture is taken from a distance of 50m with the same lens. What is the ratio of the height of...
  11. ranger

    Very Large Telescope Project - Amazing Images

    Here are some images from the Very Large Telescope project. Some pictures are over 70MB! http://www.eso.org/outreach/gallery/vlt/images/Top20/Top20/topvlt.html
  12. C

    Images and Lenses (explanation needed please)

    Okay, so I have to do a Lab Report, easy enough, I've done them before, but it isn't so clear, and when I tried doing it, I wasn't sure if I was even doing it right. (Personal Note: DO NOT TAKE PHYSICS CORRESPONDANCE! ><) Anyway, here's what I have to do. The Lab Report is on the...
  13. Y

    Image & Kernel of Linear Transformation: Q1 & Q2

    I just start learning Image and Kernel of Linear Tranfsormation, I find it very confuseing that what is the relationship between span, image and kernel in Transformation T= Ax; x=vector. Therefore I don't know how to describe the image and kernels of the transformation in : Q1 : Reflection in...
  14. C

    Needing images of atoms for project

    I am looking for ways to illustrate the chemical makeup of minerals. I belong to a mineral club and I am scheduled to give a presentation to the children about the polymorph mineral group of Kyanite, Andalusite, and Sillimanite. I would like to have images of the atoms that make up these...
  15. E

    Medical Do you see coloured images if you listen to music?

    Do you see coloured images if you listen to music? Does a certain music chord taste salty for you? Are numbers coloured for you? http://en.wikipedia.org/wiki/Synesthesia Then you might be a synaesthete. I'd like to ask if anyone here has such a synaestetic ability.
  16. quasar987

    Using the Method of Images to Find the Force on q

    The situation is illustrated in the attachment. I try to find the force on q by the method of images. I know that the potential is 0 at x=R and at infinity, and I know that The potential obeys a certain Poisson equation between those points. I will try to put a charge q' somewhere at x<R that...
  17. Monique

    How Do Satellite Images on Google Maps Reveal Earth's Diverse Landscapes?

    http://maps.google.com/ Don't know how many of you have already used it: still in beta phase, but you can zoom in on any adress and convert it into a satallite image :biggrin: (pretty cool)
  18. N

    Java Why aren't my images appearing in my Java application?

    Hi, I'm working through the "Building an Application: Part 2: Introduction to Inheritance, Panels, and Layouts" on java.sun.com and the code I've written compiles fine, but the images that are supposed to appear in the JPanel aren't there. jl = new JLabel("Java Technology Dive Log", new...
  19. G

    MATLAB Learn How to Rotate Images in Matlab: Step-by-Step Guide | Expert Tips

    OK here I am, bigshot, giving out advice on how to rotate an image when I'm just trying to learn that myself. I'm trying to do this in Matlab; it's rotating, but for some reason the rotated image is acquiring a black background and has various lines and dots superimposed on it. Can anyone...
  20. F

    How Many Reflections Appear Between Angled Mirrors?

    Hi everyone--I've been mulling over a homework question from earlier in the term: Suppose you are standinig in the middle of two mirrors of length L separated by a distance D. ((i.e. if you are standing at the origin, the centers of the two mirrors are at x=\pm \L/2)) The mirrors are at a...
  21. E

    Real vs Virtual Images: What is the Difference?

    When a lens diverges light it is a virtual images, when it converges light it is a real image. My teacher said that virtual images cannot be displayed on a screen. We did an experiment and that was the case. But how come we can see with our eyes the virtual image? Thanks in advance!
  22. chroot

    Converting Macintosh .toast Images to CD on Windows XP?

    Does anyone know of any Windows XP software that can burn Macintosh .toast images to CD? - Warren
  23. S

    Have you seen new images of Titan?

    New images from Titan! Have you seen new images of Titan?! http://saturn.jpl.nasa.gov/multimedia/images/image-details.cfm?imageID=1310 http://www.esa.int/SPECIALS/Cassini-Huygens/SEMC8Q71Y3E_1.html#subhead2
  24. Q

    Java Importing Images to a Java frame

    [SOLVED] Importing Images to a Java frame Hey guys, I have a very simple java program. I opens a frame, and I want to be able to put a picture in the frame. How do I import a picture and set it as the background to the frame? Here is my simple program: import java.io.*; import...
  25. N

    Solving Method of Images Problem for Infinite Conducting Cylinder

    Hello, I am requiring some help on a problem on method of images. The problem is, you are given a infinitely long conducting cylinder of radius a, with charge density per unit length lambda (I'll use the symbol Y) which is placed with its axis a distance d from an infinite conducting plane at...
  26. A

    Beautiful images like the butterfly

    Please take a look at http://www.geodesydesign.com/portfolio/butterfly.jpg Would you please tell me where to find out some beautiful images like the butterfly in that link ? Anything about nature is good, I really want to use them for my web page... I have tried to search google but it...
  27. I

    How Do You Create and View Stereo Images?

    Maybe this is a strange question for this forum, but you guys tend to surprise me with great answers...so.. A few years ago, a teacher of mine showed me a stereo image. He explained that it was two photographs taken 2.5 inches next to each other. This gives the perception of depth. Its like...
  28. X

    Seeing Polarized Images: A Puzzling Phenomenon

    Hey guys, I was just wondering, why can some pictures be only seen through a polarizing film, or when illuminated by polarized light? I would really appreciate your answer. Thx, Xen0 :biggrin:
  29. turbo

    How to Find HST Images: A Step-by-Step Tutorial

    Can anyone tell me how to locate HST images? There is a picture of NGC7603 on this web site. http://quasars.org/ngc7603.htm I can't seem to locate the picture by searching HST's publicly-available pictures. Punching in the ngc# yeilds NO matches, although it is evident that the image...
  30. V

    How can images dimention be larger than the domains?

    I'm lost! My book of topology says that its possible to construct a (continuous!) function f:[0,1] -> R^n such that the image is a ball {x: |x|<=1} I can't imagine how is it any possible to do such things. The book doesn't give any example or prove of it. It's just a comment. Any ideas? I...
  31. A

    News New images amplify abuse at Iraq prison

    Worse and worse.
  32. M

    Are you able to see the images of stereograms?

    Are you able to see the images of the stereograms? I've never and some times I think that that people are pulling my leg! I'm going to end cross-eyed trying to put the correct position of eyes! For example, are you able to see the image of this page?http://mathworld.wolfram.com/Stereogram.html
  33. Aquafire

    Sites that have images of diatoms

    Can anyone provide me with links to sites that have images of diatoms.? I also would love to see images of other microfossils. Thankyou Aqua
  34. D

    Why Is It Hard to Find Images of Mobius Syndrome Online?

    I'm looking for large to medium sized images for Mobius Syndrome or anything related to that. I've had a hard time finding them on the internet. I found a few pictures where patients had crossed-eyes, but I couldn't access them out of ask jeeves w/o signing-up for an account. Then I...
  35. O

    Israeli technology enables images beamed from Mars

    http://216.239.41.104/search?q=cache:ougQtHTmqPcJ:tmo.jpl.nasa.gov/tmo/progress_report/42-144/144H.pdf+Mars+LOCO-I+(LOw+COmplexity+LOssless+COmpression+for+Image&hl=en&ie=UTF-8 It seems that Israel is again repaying US loans and grants with the lastest technologies.
  36. P

    What is the focal length of the converging lens?

    A real image is formed by a converging lens. It is three times higher than the object and inverted. the object and image are 1.00m apart. what is the focal length of the lens? I assume 3 = the magnitude...the 1.00 m is confusing me since its the total distance i tried using 1/p + 1/i =...
  37. N

    What Unique Science Images Are Yet to Be Captured?

    My main job is to photograph science and technology subjects. Most of my work in recent years has involved photographing northern lights and polarstratospehric clouds (seen over artcic areas and play a role in ozone depletion). I am attempting to broaden my scope and have come up with a...
  38. E

    Is there a quick and easy way to watermark my images?

    Let's say I have a webpage, and I want to use it to post information concerning my research. Is there a quick and easy way to watermark my images? Perhaps I'm using the wrong terminology, but what I mean to say is: is there an easy way to make it so that my images can only be viewed in the...
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