Representing Images
- Created by: FinolaPower
- Created on: 09-03-16 15:19
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- Representing Images
- Pixels
- A Pixel is the smallest unit of data that can be represented in an image
- Each one can represent a single solid block of colour.
- The more pixels you use the better quality the image will be
- Bitmaps
- A bitmap image are groups of pixels
- When you enlarge a bitmap image, you simply enlarge each pixel. If you enlarge it too far, then it will PIXELATE
- Re - Sampling
- It is to physically reduce the siz of s bitmap image.
- This results in a samller file size as pixels are discarded and image therefore appaers smaller on the screen
- If it is then magnified back it its original size it will appear PIXELATED.
- This results in a samller file size as pixels are discarded and image therefore appaers smaller on the screen
- It is to physically reduce the siz of s bitmap image.
- A bitmap image are groups of pixels
- Binary
- The colours of each pixel is stored as binary
- If more bits are used to represent each pixel then more combinations of binary numbers are possible. so more colours are possible in the image
- If they is only 1 bit per pixel that would only give 2 possible colours and the COLOUR DEPTH of 1 pixel.
- Resolution
- Resolution measures the amount of detail/Pixels in an image
- The higher the resolution the higher the image
- MetaData
- Metadata is data about data
- It stores data about the track for example -Artist name -Album name -Sample rate - Track number
- It stores information about the image/song etc and the image itself. Also it tells the software how to display the image
- The HEIGTH and WIDTH of the image- so each line of the image starts in the the right place
- The RESOLUTION DEPTH - so the image displays at the correct size.
- The COLOUR DEPTH - so the correct number of bits is used to represent data
- Metadata is data about data
- Representing Data
- Untitled
- Pixels
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