GOOGLE

Doesn’t everyone use this now? Check it our for yourself !   

http://www.google.co.uk/intl/en/about.html

GIF FILE

A standard computer file format for graphic images. GIF files use data compression to reduce the file size. The original version of the format was developed by CompuServe in 1987.  GIF and JPEG are the most commonly used graphics formats on the internet. GIF images display up to 256 colors. It supports animation and allows an individual palette of 256 color for each frame. The color limitation makes the GIF format inappropriate for reproducing color photographs and other images with consistent color. GIF images are compressed using the LZW lossless data compression method to decrease the size of the file without corrupting the visual quality.

GAUSSIAN BLUR

Gaussian blur, named after Carl Gauss, describes blurring an image by a Gaussian function. It is a widely used effect in graphics software, typically to reduce image noise and reduce detail. The visual effect of this blurring technique is a smooth blur resembling that of viewing the image through a translucent screen, distinctly different from the bokeh effect produced by an out-of-focus lens or the shadow of an object under usual illumination. Gaussian smoothing is also used as a pre-processing stage in computer vision algorithms in order to enhance image structures at different scales. Examples of gaussian blur below - Image 1 with no gaussian blur, image 2 with radius 1 pixel and image 3 with radius 2 pixel. 

GRAYSCALE

A bitmap image format that containing shades of grey values as opposed to only pure black and pure white. This format is used for single colour usually black photographs and images. There are 256 possible values of grey from white to pure black.

GIGABYTE

A gigabyte (GB) is a measure of computer data storage capacity and is “roughly” a billion bytes. A gigabyte is two to the 30th power, or 1,073,741,824 in decimal notation. The prefix, “giga” comes from a Greek word meaning “giant.”

HYPERLINK

HTML programming which redirects the user to a new URL when the individual clicks on hypertext.
A reference link from some point in one hypertext document to a point in another document or another place in the same document.  A browser usually displays a hyperlink in some distinguishing way, e.g. in a different colour, font or style.  When the user activates the link (e.g. by clicking on it with the mouse) the browser will display the target of the link.

HELPER APPLICATIONS

Small software programs linked to your browser that help you watch video and listen to audio.

HALO EFFECT

GIF files support a feature called transparency, in which one color out of the 256 colors is set to be transparent. If your GIF has a background that is much different from where it will appear on your page, making the background transparent after anti-aliasing will leave what is known as a “halo effect” around the object. The halo itself is called the fringe.

H.264 VIDEO

H.264 is a standard for video compression. It is also known as MPEG-4 Part 10, or MPEG-4 AVC (for Advanced Video Coding).

HARD DRIVE

The hard drive is what stores all your data. It houses the hard disk, where all your files and folders are physically located. A typical hard drive is only slightly larger than your hand, yet can hold over 100 GB of data. The data is stored on a stack of disks that are mounted inside a solid encasement. These disks spin extremely fast (typically at either 5400 or 7200 RPM) so that data can be accessed immediately from anywhere on the drive. The data is stored on the hard drive magnetically, so it stays on the drive even after the power supply is turned off. The term “hard drive” is actually short for “hard disk drive.” The term “hard disk” refers to the actual disks inside the drive. However, all three of these terms are usually seen as referring to the same thing - the place where your data is stored.

HISTOGRAM

A graphic representation of the distribution of tones within an image. The horizontal axis represents each pixel value possible from black to white. The vertical values indicate the number of pixels in the image that occur at each value level.

HUE

If only my excellent teacher knew how much we (tamtafe 16 and 17) like this Hugh!

Oh well… maybe it’s just this hue . . . .

The dominant wavelength of a color. A color system, or model, measures color by hue, saturation and luminance. The hue is the predominant color, the saturation is the color intensity, and the luminance is the brightness.

HOSTNAME

A name is the identifier of your computer on the network. A hostname is the Domain Name System (DNS) name of a computer on a network. Hostnames can be used for locating computers on the network. For the computer to contact another computer by using a hostname, the hostname will either appear in the DNS server or in the hosts file.