Image
An image (from Latin imago) or picture can be:
- a visual 2D reproduction of an object or a person by using optics (using a camera, mirror, refraction, telescope, microscope, etc.)
- 2D production produced manually, such as a drawing or painting, produced by a computer, e.g. a graph, or something in between such as a computer-aided production, using e.g. a bitmap graphics editor, and possibly making use of a photograph, see also pseudo-photograph. It may be more artistic or more technical, and it may or may not be a reproduction of an object or a person.
A related distinction is a volatile image (something one sees, remembers, or imagines), an image on paper, on textile (e.g. a T-shirt), etc., and a digital image.)
A digital image can be converted to one on paper by printing, using a computer printer; the converse can be done by scanning.
In computing a text should be distinguished from an image showing a text. OCR is used to convert the latter to the former.
See also:
In computer science, image can be used in :
- Disk image: a CD-ROM ISO image or floppy image. Itīs a file that contains sector by sector what is in a CD-ROM or floppy.
- Executable image: A structured file containing machine instructions and data. This file can be loaded into a process's virtual memory and executed. See kernel (computers) image.
In mathematics, an image is a value or set of values of a function.
Specifically, let f be a function from the set X to the set Y.
If a is an element of X, then its image under f is the value f(a).
If A is a subset of X, then its image under f is defined to be f(A) := {f(a) : a in A}.
Finally, the image of f itself is f(X), the same as the range of f.
In religion, an image is an idol or icon.
In philosophy, an image is a conception or idea.
In Comics, Image is a publisher of such characters as Spawn. See Image Comics.
