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Bitmap graphics are typically used to create realistic graphics and images. They are the most common type of graphics used around the world and are supported on digital systems. Bitmap graphics are also known as raster graphics and pixel maps.

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A bitmap graphic is created of lots of tiny parts called pixels, which are able to be many different colors, each pixel can be edited. When you zoom into a bitmap graphic the picture looses quality and you can begin to see pixels individually. Pixellation is caused by displaying the bitmap at a size that it is not meant to be.

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Give some software examples with prices, commercial and education for Bitmap.

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Give some software examples with prices, commercial and education for Bitmap.

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There are many applications that you can use to make bitmaps with. One of the applications is Paint this is free with all Microsoft computers and is easy to use, however the quality of an image is not great. There are more expensive ones such as Illustrator which again costs £23.99 per month

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How does their file size compare with vectors, explain why there is a difference? 

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How does their file size compare with vectors, explain why there is a difference? 

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Vectors are usually small, as the computer stores details of objects, which do not require much memory. Where as Bitmap graphics have large file sizes as the computer stores every detail of every pixel.

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Bitmap graphics do not scale well. When you resize a bitmap graphic, it tends to lose quality.

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When taking a photograph using a camera, or when scanning an image, a bitmap graphic is then created. Bitmap graphics are composed of many many small pixels, these are often many different colors, it is even possible to edit each individual pixel.

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Bitmap formats:
BMP or  DIB is the common Bitmap file format.
What are they suitable for?
The BMP format is suitable for taking photos storing up to two-dimensional digital images.

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Do Bitmap Graphics support transparency? 

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Do Bitmap Graphics support transparency? 

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Bitmap graphics do not support transparency because BMP images are very pixel dependent therefore, the don't scale well on the internet. The details of a bitmap image would come out to the cost of file size and this is why it is very rare o find images on the web.

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Do vector graphics support transparency? 

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Do vector graphics support transparency? 

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Vector graphics do indeed support transparency. The most common raster file formats that support transparency include GIF, PNG, BMP, TIFF and JPEG. It is used through either a transparent colour or an alpha channel. Most vector formats implicitly support transparency because they simply avoid putting any objects at a given point. Here is an example of raster/vector transparency.

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Give some software examples with prices, commercial and education.

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Give some software examples with prices, commercial and education.

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An example of a software where you can create a vector image in is Adobe Illustrator, the cost of this is £23.99 per month

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How does their file size compare with bitmaps, explain why there is a difference? 

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How does their file size compare with bitmaps, explain why there is a difference? 

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Vectors are usually small, as the computer stores details of objects, which do not require much memory. Where as Bitmap graphics have large file sizes as the computer stores every detail of every pixel.

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What are vector graphics typically used for? 

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What are vector graphics typically used for? 

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Vector graphics are used for several things, however one of the first uses for vector graphics was the US SAGE air defense system. Most vector graphics nowadays are used in dynamically modifiable stored lists of drawing instructions, therefore it can be used in many things such as home gaming systems and many more. However in the present day vector graphic files are used for drawings and are typically printed as bitmaps, after vector to raster conversion. It is one of several modes an artist can use to create an image on a raster display.

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Vector graphics are easily scalable, therefor when you resize them, they do not lose quality. there is an interactive diagram on http://www.bbc.co.uk/schools/gcsebitesize/dida/graphics/bitmapvectorrev2.shtml which shows how vectors are scalable.
This image shows the difference of how bitmaps and vectors work.

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Vector Graphics, unlike GIFs, BMPs and JPEGs, are not actually made up of pixels on a grid; instead vector graphics use a system of paths, which are then defined by having a starting and ending point. These are then accompanied by other curves, points and different angles along the way. A path doesn't necessarily have to to be a line, it can be comprised of a triangle, square or even a curvy shape. These shapes can then be used to either create some simplistic drawings to even complex diagrams. Vector-based images can be better than bitmap in some cases because they don't use a specific number of dots, they can be scaled up or down without having to compromise the quality.

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Vector formats:
Formats such as AI (Adobe Illustrator) and EPS (Encapsulated Postscript Vector) remain editable. But images that are saved as JPG, PNG or GIF cannot be edited.
What are they suitable for?
File formats can be used to save vectors in a variety of ways. For example you could save a vector image as an EPS format so it can be edited, or you could save the file as JPEG to reserve space.
(SAME PICTURE DIFFERENT FORMAT)

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Diagram of how lossless and lossy compression works.

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Diagram of how lossless and lossy compression works.

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What we use lossless compression for and when we should use it?

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What we use lossless compression for and when we should use it?

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We use lossless compression for images and audio pieces, RAW, BMP, ZIP, WAV, FLAC, MKV and WMV are all formats of lossless compressed items. There are very few lossless video formats, this is because if we were to use lossless compression for videos, many of them would be consuming way too much space. Usually if you are wanting to print a professionally taken photo you would use lossless compression, whereas if you are uploading to the internet, then it is common to use lossy compression. Also, if you want to listen to music on your phone casually then it is recommended that you use lossy compression rather than lossless, whereas if you want to burn a perfect copy then it is advised that you use lossless compression. Basically, you use lossless compression for files that need everything in the file, e.g exe, source code, ect.

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What is lossless compression how does it work? 

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What is lossless compression how does it work? 

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Lossless compression is used in many application. For example, it is mostly used in ZIP or GNU formats. The way lossless compression works is it breaks the file into a SMALLER form for transmission or storage and then it will be put back together on the other end so it can be used again, in other words a reversible method.

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In signal processing, data compression, encoding information using fewer bits than the original representation.

It is being able to reduce the amount of number of bits needed to store or transmit data i.e. a picture

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What is it?
Lossy compression is a data encoding method that discards partial data. This technique is used to reduce the data size for storage. It also improves the handling and transmitting of content.
How does it compare to Lossless compression?
Unlike Lossless compression, Lossy compression CANNOT reverse data compression, which enables it to compress a lot more data than lossless techniques.
When is Lossy compression used?
Lossy compression is used to compress a variety of multimedia data including audio, video, images.

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Yes it is reversible. Lossless compression is where every single bit of data that was in the file remains after the file is uncompressed. All of the information is completely restored. Once it has been reversed it can be used over again for the original data to be reconstructed.

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Compression is where you reduce the number of bits needed to represent data, as a result, you can save storage, speed during file transfer, and overall decrease costs for storage.

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Lossy data compression technique is where you are compressing the data and then decompressing it, when the data is then retrieved it can actually be very different from the original, but can be 'close enough' to be useful in some means. In lossy codecs, the samples of pictures and sounds are taken, then they are cut into smaller segments; they are then transformed into something with a new basis which is also quantized.
Lossy data uses decoded data which is used to predict the current sound sample or image frame. This means that when a file is compressed using lossy the original data cannot be restored from the compressed file.