What email address or phone number would you like to use to sign in to Docs.com?
If you already have an account that you use with Office or other Microsoft services, enter it here.
Or sign in with:
Signing in allows you to download and like content, and it provides the authors analytical data about your interactions with their content.
Embed code for: Data Representation
Select a size
ASCII and Unicode
ASCII character set is a 7 bit set of codes that allows 128 different characters. That is enough for every upper case , letter lower case letter, digit and punctuation mark on most keyboards. ASCII is only used for the English language.
Unicode uses between 8 and 32 bits per character, so it can represent characters from languages from all around the world. It is commonly used across the internet. As it is larger than ASCII it might take up more storage space when saving documents.
Images can be stored in different ways on a computer. A drawing that you create in PowerPoint is a vector graphic. It is made up of lines and shapes with specific properties such as line style, line colour, start point and end point. The computer stores all of this data about each shape in binary.
Colour depth of an image is measured in bits indicates how many colours are available for each pixel. In the black and white image, only two colours are needed. This means it has a colour depth of 1 bit.
Resolution of an image is the number of pixels or dots that make up an image. The greater the number of pixels the sharper the image will be and the larger the file size of the image.
Metadata means data about data and provides information about the image. Image files usually also contain metadata.
The information includes:
Time and Date
Camera settings when the photo was taken
Compression is used to reduce file sizes and change various attributes of an image file.
These information includes:
There are three types of compressed image
PNG is a lossless compression type. It is often used where the graphic might be changed by another person or where the image contains layers of graphics that need to be kept separate from each other. It is high quality.
JPEG is often used for digital camera images because it has a fairly small file size for the quality that it displays. JPEG is a loss format that offers a higher compression rate than PNG in the trade-off for quality.
GIF compresses images to a maximum 8-bits colours, making it unsuitable for high-quality photographs. GIF is often used where transparency is needed on the graphic.
Lossy and Lossless Compression
Lossy compression permanently removes data. Data encoding method where files are compressed by removing some of the detail.
Lossless compression means that as the file size is compressed, the picture quality remains the same it does not get worse.
Thanks For Watching