DIGITAL PHOTOGRAPHY I

The following list has been compiled from many different sources.

16-bit image

An image containing 256 or fewer colors [1]

24=bit image

An image containing roughly 32,000 colors [1]

aliasing

gives the image rough edges, a jagged look

bit

"binary digit." A bit is the basic unit of digital information. Eight bits equals one byte.

BMP

Windows bitmap graphic. Lower quality images.

byte

eight bits.

CCD

Charge-coupled device. One of two types of computer chips used to capture images in digital cameras. [1]

cloning

The process of painting one portion of an image onto another image or another part of the same image. [1]

CMYK

The print color model, in which cyan, magenta, yellow and kelvin (black) inks are mixed to produce colors. [1]

color correction

The process of adjusting the amount of different primary colors in an image. [1]

compositing

Combining two or more images in an image editor. [1]

downloading

transferring computer data from one computer or device to another (eg: downloading images from a camera to the computer)

dpi

Dots per inch. The higher the dpi, the more detailed a printed image will be, and the larger the file size.

file format

types of files. TIFF, EPS, BMP, JPG, GIF are examples. Each format has a different purpose.

gigabyte

approximately 1,000 megabytes, or 1 billion bytes. [1]

grayscale

An image consisting only of shades of grey, from black to white. [1]

kilobyte

One thousand bytes. Abbreviated as K or Kb [1]

LCD

Liquid crystal display. A display screen on many digital cameras [1]

marquee

The dotted outline that results when you select a portion of your image. [1]

megabyte

One million bytes. Abbreviated as MB or meg.

noise

Grainness in an image, caused by too little light or a defect in the electrical signal generated during the image-capture process. [1]

pixel

Short for picture element. The basic building block of every image.

resolution

The number of pixels per linear inch (ppi) in an image. Generally speaking, higher resolution means better images. Also used to describe printer, screen, or scanner capabilities. [1]

RGB

The standard color model for digital images; all colors are created by mixing red, green, and blue light. [1]

sharpening

Applying an image-correction filter inside an image-editor to create the appearance of sharper focus. [1] Too much sharpness can ruin an image.

uploading

See downloading. 

USB

Universal Serial Bus. A type of high speed port included on our school computers. Peripheral devices such as digital cameras, printers, scanners, memory-card readers and some mice can be connected through the USB port.