Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/20

Click to flip

20 Cards in this Set

  • Front
  • Back
Bitmap
A binary representation of an image, in which each bit is mapped to a point(pixel) on the output device where the point will either be on or off.

An image formed by a rectangular grid of pixels, each one of which is assigned an address as x.y coordinates and values, either grayscale or colour
Byte
The standard unit of binary data storage in computer memory or disc files. A byte containing 8 bits can have any value between zero and 255
CCD
(charged couple device)
A solid state image pick up device composed of rectangular matrix or single row of light sensitive picture elements
CMOS
( complementary metal oxide semiconductor)
an alternative imaging sensor to the CCD, which can contain more processing functions in its architecture. it converts the signal to a digital value within each pixel in a single step. it requires less power than the CCD and its cheaper to manufacture.
Digitize
Convert into digital form. Digitalation is subdivided into the processes of sampling the analogue signalat a moment in time, quantizing the sample and coding the number in binary form.
Dither
A method of making digitized images appear smoother using alternate colours in a patter to produce a new perceived colour.
Down-Sample
To reduce the resolution of an image.
Effective Pixel
The actual number of pixels involved in the recording of an image.
FM Screen
An alternative to conventional screening that separates an image into very fine, reandomly placed dots as opposed to a grid of geometrically aligned halftone cells. it is similar in concept to mezzotint.
Halftone
The process of printing continuous tone photographic images by simulating the continuous tone with a series of dots of varying sizes.
Image Resolution
Digital images from digital cameras or scanners are composed of a square or rectangular grid of pixels. The resolution of digital images in quoted in the number of pixels per (linear) inch, or the total number of pixels in a image. usually millions of pixels.
Image Sensor
An image sensor contains a grid of minute light sensitive pixels (photosites) which act like a photogenerated light meter, measuring the amount of light falling upon them and generating an electrical current in proportion to its intensity.
Index Color
A single-channel image with 8 bits of colour information per pixel. the index is a clut containing up to 256 colours. This range of colours can be edited to include only those found within the image. Digital images in multimedia programs are often in indexed colour mode.
Jaggie
Refers to displays of bitmapped images, where both curved and diagonal straight lines appear to be jagged are composed of square pixels.
JPEG
A widely used lossy compression routine for the storage of still photographic images. Users can specify the amount of compression used when saving the image
Line Art
The term given to diagrams consisting of black lines on a white background, or vice versa
LPI
The scale used by printers when specifying the halftone screen used in a printing process.
Mega Pixel
One million pixels
Pixel
The term derived from picture element, usually taken to mean the smallest area capable of resolving detail in an image sensor such as a ccd array
Posterize
traditionally a photographic printing method of reducing a continuous tone monochrome or colour image to a predetermined number of tones, each of which is a uniform tone or colour value. typical posterizations will have between three to five tones.