Image
Image
House of Orange-Nassau
Category="Optics"Category="Vision" - For other uses, see Image (disambiguation)
- For images in Wikipedia, see Wikipedia:Images.
See also: Photograph
In common usage, an image (from Latin imago) or picture is an artifact that reproduces the likeness of some Subject-usually a physical object or a person.
Images may be two dimensional (e.g. a Photograph) or three dimensional (e.g. a Statue). They are typically produced by optical devices-such as a cameras, mirrors, lenses, telescopes, microscopes, etc. and natural objects and phenomena, such as the human Eye or water surfaces.
The word image is also used in the broader sense of any two-dimensional figure or illustration, e.g. a Map, a Graph, a Pie chart, an abstract painting, etc. In this wider sense, images can also be produced manually (by Drawing, Painting, Carving, etc.), by Computer graphics technology, or a combination of the two (see Pseudo-photograph).
A volatile image is one that exists only for a short period of time, e.g. the Reflection of an object by a mirror, a Projection of the sun on a wall by a Pinhole camera, or a scene displayed on a Cathode ray tube. A fixed image, also called hardcopy, is one that has been recorded on a material object, such as Paper or Textile.
A Mental image exists in someone's mind: something one remembers or imagines. The subject of an image need not be real; it may be an Abstract concept, such as a graph or function-or an imaginary entity or being.
Specialized meanings
The word also has many specialized meanings in various disciplines and contexts: - In geometric optics, a lens can produce a Real image or a Virtual image.
- In many other scientific and technical contexts, image usually means a two-dimensional Signal-a physical phenomenon that can be modeled as a function from a two-dimensional domain (such as the plane or a Rectangle) to some set of values, usually real numbers or vectors. This sense covers not only digital images but also analog ones, such as photographs. See Image processing.
- In Computer graphics and Digital image processing, the word image almost always means Digital image or, by extension, any computer description of an image, e.g. a raster map, an image file, or a 2D computer graphics model. For Embedding an image in a webpage, see HTML element. A number of standard test images are in use in the image processing literature which serve as a common test of various image processing algorithms.
- In Computer science the word image can also mean an exact (bit-by-bit) copy of the contents of some device, such as a Hard disk, Floppy disk, CD-ROM, semiconductor storage chip, etc. In particular,
- A core image (or Core dump, from Magnetic core memory, the predominant RAM technology of the 1960s) is a faithful copy of the data stored in the main memory of a Computer or process.
- An executable image is a structured file containing machine instructions and data, which can be loaded into a process's Virtual memory and executed. See kernel (computers).
- A ROM image is a copy of the contents of an entire ROM chip, typically a video game executable, which may then be stored on another medium (in the case of copyrighted games, this comes under the category of software piracy).
- In Mathematics, an image of a function consist of the output values of the mathematical function.
- In Finance, the image is a coefficient (Stock image) that bridges a stock's fundamental value and its Market price.
- In Philosophy, an image is a Conception or IDEA.
- In Religion, an image is an Idol or icon, although these terms have very specialised meanings within certain sects and should not be held as always synonymous.
- In Social psychology an image is a representation.
- In Marketing image is often used as shorthand for the perception that consumers have for a Brand, its values and its benefits (often referred to as brand image).
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Image Comics is an American publisher of comic books. - The IMAGE spacecraft currently observing the Earth's Magnetosphere
See also
External links
[image]- "Chance Image" at The Dictionary of the History of Ideas''
- Ithaki: Web search engine for images
- Irfanview 3.95: Free image viewing software
- [https://tserver.girafa.com/sec/signup.acr?fp=1 Free website images]
- Free Online Image Search and Edit
- Pictures free Download