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    #1

    "the picture plane"

    hi,
    what would you understand from a chapter title like this, please? the context is a drawing book.
    thanks.

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    #2

    Re: "the picture plane"

    A flat surface (plane) on which to draw?

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    #3

    Re: "the picture plane"

    Quote Originally Posted by jctgf View Post
    hi,
    what would you understand from a chapter title like this, please? the context is a drawing book.
    thanks.
    That's a technical term, not strictly an English idiom.

    A picture (painting, photograph, projected movie image or image in the back of one eye) is a two-dimensional projection of a three-dimensional real scene.

    If the picture is flat, it is mathematically a plane. Look at a scene directly; put a flat screen perpendicular to your line of sight in front of what you're looking at; and put each object in the scene on the screen exactly where the line between the object and your eye intersects the screen. Thus you've drawn a picture on the screen, i.e. the picture frame.

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    #4

    Re: "the picture plane"

    Quote Originally Posted by jlinger View Post
    A flat surface (plane) on which to draw?
    Precisely! I had never seen the word ''plane'' being used in such a way. Is it common and natural, please? Are there more expressions or situations in which we employ the word ''plane'' to mean "flat"?
    Thanks!

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    #5

    Re: "the picture plane"

    Quote Originally Posted by abaka View Post
    That's a technical term, not strictly an English idiom.

    A picture (painting, photograph, projected movie image or image in the back of one eye) is a two-dimensional projection of a three-dimensional real scene.

    If the picture is flat, it is mathematically a plane. Look at a scene directly; put a flat screen perpendicular to your line of sight in front of what you're looking at; and put each object in the scene on the screen exactly where the line between the object and your eye intersects the screen. Thus you've drawn a picture on the screen, i.e. the picture frame.
    that's exactly what a "picture plane" is all about, according to the book.

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    #6

    Re: "the picture plane"

    "Plane" in this sense is a perfectly flat surface. As a noun, it is rarely used non-scientifically or non-technically in this original meaning.

    But it can be used as a verb:

    To plane the wood.

    Metaphorically, "plane" means a state of existence.

    On a higher plane = more abstractly.

    The astral plane = the universe of all souls, in a spiritual sense.

    "Plane" is, of course, also a common short form for "airplane".

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