What is Perspective: Definition and 219 Discussions

Linear or point-projection perspective (from Latin: perspicere 'to see through') is one of two types of graphical projection perspective in the graphic arts; the other is parallel projection. Linear perspective is an approximate representation, generally on a flat surface, of an image as it is seen by the eye. The most characteristic features of linear perspective are that objects appear smaller as their distance from the observer increases, and that they are subject to foreshortening, meaning that an object's dimensions along the line of sight appear shorter than its dimensions across the line of sight. All objects will recede to points in the distance, usually along the horizon line, but also above and below the horizon line depending on the view used.
Italian Renaissance painters and architects including Masaccio, Paolo Uccello, Piero della Francesca and Luca Pacioli studied linear perspective, wrote treatises on it, and incorporated it into their artworks, thus contributing to the mathematics of art.

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  1. R

    Exploring the Oblate Sphereoid of Earth: A Farm Boy's Perspective

    Being essentially a farm boy I till, plant and cross-breed in strict accordance with that angle of incidence as coincident with the diurnal arc of the sun. Determined from this and considering the dimensions of Earth to include the uppermost limit of its atmosphere, I find it to be the shape of...
  2. Mk

    Mass of Strings and Branes: A Physicist's Perspective

    Do physicists have any idea how much a string or brane would mass?
  3. T

    Geometric formulas of linear perspective

    10 years ago i tried (as an artist) to solve the problem of how to translate the 3 dimensional cartesian coordinate onto the 2 dimensional surface with the precise foreshortening. I've only ever figured out 3 formulas for 3 different standpoints... then i gave up. now i recollected my notes, and...
  4. Chi Meson

    Centrifugal force from GR perspective

    I got this from Wikipedia (under the definition of centrifugal force): I need some clarification here. I had understood that the "ficticious forces" of centrifugal and coriolis were "inertial effects," and that with GR the gravitational force was also an inertial effect. The Wikipedia...
  5. D

    Exploring Quantum Field Theory: A Student's Perspective

    At my physics faculty there is this magazine that comes out once every three months. I wrote an article about GR for it. Introducing not only the concepts but also some mathematics. I explained the field equations and derived some implications of the Schwarzschild metric. I could do this because...
  6. F

    Understanding Bedwetting in Babies: A Parent's Perspective

    im a father of a baby girl. she is now 12 months. she wets the bed evry morning, i has to be up all night some times to keep an eye on her, some times she wets my body too. only curious question. why do babies wet the bed ? wht do those babes think in mind when sleping? thank u
  7. D

    It's All Relative: Why Perspective is Everything

    Really, who cares? You're going to die anyway.
  8. M

    Universal Perspective: Exploring the Singularity of Zero Emergence

    Let’s imagine that all existence is a big square block of legos. It is infinitely big, so it has no boundaries, but for the purpose of this experiment, it has boundaries. The individual legos are quantified as ONE, just as the entire block is quantified as ONE, because it is all of everything...
  9. H

    Reason(s) why our perspective of science is wrong

    For all the knowledge which has been given to me, I have only to thank A.C. Bhaktivedanta Swami Prabhupada, my Spiritual Master and Lord Krsna. Please read on... I was just reading an article from this site (http://science.krishna.org/Articles/2003/04/021.html ) and it poses a very true...
  10. N

    Plane of Perspective: Michio - Proving Which Plane is Right

    Michio when we look at our galaxy we will see it from our plane of perspective,which say for arguements sake is north, and that from here we say that gravity is pulling things into the center of the galaxy.but what if i were to rotate this plane 180 degrees so that north becomes south and...
  11. M

    Why is the speed of light constant regardless of perspective?

    I understand why it needs to be for relativity, but I don't understand why it is always c regardless if we're speeding toward it or away from it as some insane velocity, can someone tell me without a reference to relativity?
  12. D

    Why you should like my perspective

    Ok guys, no one seems to have been able to point out any great flaw in the geometric representation I have proposed in the thread "A Thought Experiment". That is, I believe I have presented a good case that the issue is representation only and not an issue of physical validity. If that is...
  13. kat

    News WMD-Tehran times and a li'l perspective

    While googling something else I came across this interesting and opposing perspective to the recent thread presenting Tehren's reporting of WMD activities in Iraq. Here is the old thread WMD Scam in Preperation? and a bit of a blurb from that thread: Now here's the opposing but...
  14. K

    See "Awakin Life": A Movie That Will Change Your Perspective

    Has anyone seen awakin life? if not i suggest you see it!
  15. dduardo

    MS Perspective: OO.o vs MS Office

    http://members.microsoft.com/partner/salesmarketing/opensource/discguides/OpenOffice.pdf Very funny stuff. I think Micosoft is getting a bit worried about Open Source.
  16. R

    For those about to go Surfing tomorrow?Big-Bang new perspective?

    Somthing to ponder during a quite moment, the theorized Big-Bang is the cornerstone of our Universe model, a beginning?..where we evolved from, the Ultimate reference point, the singularity at the beginning of the Universe. If we use some different perspectives we can base models on what we...
  17. marcus

    Brief perspective on notion of the big bang

    The notion of the big bang is familiar to everybody at PF. The idea has dominated how people think about cosmic history maybe since around 1965 with the detection of the CMB. Widely shared myths or images about beginnings are important parts of culture. If anyone has a link to some online...
  18. T

    The Yin Yang of Evil and Good: A Taoist Perspective

    if God is all... if God is all powerful and all good then there would be no evil in the world, but there is evil in the world, therefore God is not all powerful or all good (don't know who wrote this) but in taoism (the yin yang symbol), it means that everything has an opposite side of...
  19. russ_watters

    News Peter Arnett's Dismissal from NBC/MSNBC: A Free Press Perspective

    Not sure if everyone heard, but Peter Arnett was fired yesterday from NBC/MSNBC for giving an interview on Iraqi tv. He said things not too dissimilar from what you hear on other reports about how the war isn't going well (according to the media), he just went a little further - and said the...
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