Computer Graphics

Exploring Computer Science with Mr.gurnick at Reseda Senior High School

About this deck

By: jessica ulloa
Created: 2012-04-09
Size: 36 flashcards
Views: 11

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Duotone

use of halftones such as black along another color.

halftone

use of tiny dots of various sizes, shapes, and spacing to produce pictures and images in print. The halftone technique creates the illusion of a continuous range of colors or greys. Newspaper photos are the best example of halftone graphics.

pixel

a picture element is a single point in a bitmapped or raster image. It is the smallest element in a display device (monitor, projector) whose color can be seen and controlled by software.

pixellated

distortion due to not having enough picture elements (pixels) when making a picture larger.

Bitmap

A pattern or grid that defines the specific color, hue, and brightness of each picture, divided into teeny tiny picture elements called pixels.

Jaggedness

a result of pixilation when the edge of a picture looks distorted like steps or stairs. Jagged means abrupt or sharp angle.

image resolution

the amount of clearly visible detail that can be seen in an photograph or picture.

Cathode

The device that produces pictures in old style televisions. Electrons are shot from the negative side of the device and hit a phosphorescent screen. Old school televisions were _________ ray tubes.

graphic primitives

basic simple shapes such as circles, rectangles, lines, and other simple polygons

typeface

any one of thousands of designs that produce the characters (letters, numbers, and symbols) that make up any particular language. There are four common categories of type, serif, sans serif, script, and black text (Old English)

GUI or Graphical User Interface

The system software that comes between the human user and the operating system. Today we use a picture and icon system to point and click at objects and tasks we want to work on or perform

Dialog box

an information window opened by the operating system or a program that is used to allow the human computer user to give information to the computer program in order to continue the activities being done by the computer.

Interpolation

similar to estimation, where the computer calculates the new position of changed objects and changes them based upon those calculations.

Aliasing

The computer makes careful calculations regarding the edges of pictures to create smooth even edges rather than jagged edges.

Macromedia

Is a now defunct (no longer in business) company who originally produced well known programs such as Flash and Dreamweaver. Adobe Inc. bought the Macromedia Company several years ago.

Raster

a raster is another word for a grid. A grid is a pattern of rows and columns. Think of a screen on a window or door. Each tiny hole in the screen is a picture element, or pixel. All of the pixels form a grid or raster. Bitmapped graphics are also known as raster graphics.

Z-order - (Krikor)

In vector graphics, this refers to the z axis (x,y and z axis in three dimensions) it describes how new objects are created "closer" to the user and can be moved forward or backward in the virtual 3D space in the computer.

Jpeg

Jpeg is graphic file format, a manner by which a bit mapped graphic is compressed and stored on a computer hard drive or other storage media. There are many other graphic file formats, pict, png, tiff, and bmp are a few. Jpegs are most commonly used in photography.

Ivan Sutherland

wrote a computer program called sketchpad, in 1963. Sketchpad demonstrated the ability of humans to do both artistic and technical drawing. Also demonstrated a Graphical User Interface (GUI).

Lemple-Ziv

is the jpeg compression algorithm ,the mathematical formula for making reducing the size of graphic files

PSD

Photoshop document file

PNG

portable network graphics a bitmapped image format that uses lossless data compression.

GIF

ne of the first graphic file formats used on the web. It was introduced by CompuServe in 1987. It was often used to build small simple graphic animations.

SVG

a newer file format for vector graphics especially designed for use on the internet in websites.

Electron beam

a directed group of negatively charged particles (electrons) which are part of a cathode ray tube.

Compression

way of making a very large files like movies, photos, or music, take up less storage or memory space. This method removes some original data forever. When the file is returned to its regular size, some original information is lost or gone.

lossless data compression

a way of making very large files like photos or music or movies, take up less memory or storage space without loosing the original data that makes up the file. When the the file is returned to it’s original size, it is the original file.

*Consortium

a group of companies that have agreed upon a standard way of doing some computer process or electronic component design.

Array

a group of items arranged in a manner similar to a spread sheet where every item is part of a set identified by a letter (or term) and a number.

Transparent

allowing light and images to pass through a material. Easy to see through.

Translucent

allowing light to pass through, but with such distortion that images cannot be formed.

Opaque

not allowing light to pass through. A material that you cannot see through.

Opacity

the amount of percentage ability see through something. You cannot see through something that has high (100%) opacity.

Transparency

the amount of percentage ability to see through something (the opposite of opacity). You can see through something that has high (100%) transparency.

Gradient

a change such as a downward slope in a road, or a consistent change in the amount of something across a distance or space, such as a consistent change in color from dark to light.

Bezier

a French curve, or the computer graphics tool that creates smooth curves.

About this deck

By: jessica ulloa
Created: 2012-04-09
Size: 36 flashcards
Views: 11

About StudyBlue

“Simply amazing. The flash cards are smooth, there are many different types of studying tools, and there is a great search engine. I praise you on the awesomeness.”
Dennis