038 - Types of Photos on PC

A photo is a picture taken by a electronic device with camera that produces a printed or digital copy of a person, place or object. A picture, also called an image, is a group of colored points on a flat surface that looks the same as something else. The smallest portion of an image in a monitor screen is called pixel.

A photo or photograph is an image created by light falling on a light-sensitive surface, usually photographic film or an electronic medium such as a Charge-Coupled Device (CCD) or a Complementary Metal-Oxide-Semiconductor (CMOS) chip. Most photographs are created using a camera, which uses a lens to focus the scene's visible wavelengths of light into a reproduction of what the human eye would see. Sometimes an artist say pictures are worth a thousand words.

What is Graphics

Graphics are visual images or designs on some surface, such as a wall, canvas, screen, paper, or stone to inform, illustrate, or entertain. In contemporary usage it includes: pictorial representation of data, as in computer-aided design and manufacture, in typesetting and the graphic arts, and in educational and recreational software. Images that are generated by a computer are called computer graphics.

Examples are photographs, drawings, Line art, graphs, diagrams, typography, numbers, symbols, geometric designs, maps, engineering drawings, or other images. Graphics often combine text, illustration, and color. Graphic design may consist of the deliberate selection, creation, or arrangement of typography alone, as in a brochure, flyer, poster, web site, or book without any other element. Clarity or effective communication may be the objective, association with other cultural elements may be sought, or merely, the creation of a distinctive style.

Graphics can be functional or artistic. The latter can be a recorded version, such as a photograph, or an interpretation by a scientist to highlight essential features, or an artist, in which case the distinction with imaginary graphics may become blurred.

Types Of Graphics

Raster Graphics • are comprised of tiny squares of color information, which are usually referred to as pixels, or dots.

Raster images are made up of a set grid of dots called pixels where each pixel is assigned a color value. Unlike a vector image, raster images are resolution dependent.

When you change the size of a raster image, you shrink or stretch the pixels themselves which can result in a significant loss of clarity and very blurry image. Raster editors such as Photoshop or GIMP are great for photographs as well as for adding effects, shadows and textures to designs.

Vector Graphics • are built using mathematically defined areas to produce shapes, lines, and curves.

Vector images are made up of basic geometric shapes such as points, lines and curves. The relationship of the shapes is expressed as a mathematical equation which allows the image to scale up or down in size without losing quality.

Logo designs and print work such as brochures and posters should be designed as vector images using vector drawing software like Adobe Illustrator, Corel Draw or Inkscape.

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