digital graphics

What is a pixel?
A pixel is a small dot of colour that in large doses that put together to make a low quality image. The pixel is the smallest addressable screen element that can be seen, each pixel has its own address and its address is it coordinates. Each pixel can have its own colour so it is a large file if you have a high resolution because there is so many different colours in each file.

What is a bitmap?
A bitmap is an image that looks amazing at the right size but when it is zoomed in on its quality fades in till all you can see is pixels. Bitmap images are usually used for Internet pictures that are small files that are quick and easy to download.

What is a vector?
A vector is an image that looks amazing at its right size but even if you zoom in to a section of the image the quality stays the same and doesn't show any pixels. Vector images are used for high detailed jobs like if you work in a taxi service you need to get the logo for a small flier and a large taxi size so you need an image that is not going to lose quality when zoomed in on.

What is a JPEG?
A JPEG is a bitmap image file because if it is used to much it loses quality this makes it a lossy image, but it has a small image size.

what is a PNG?
A PNG is a portable network graphics that is also an bitmap image that is used for Internet use and not for saving loads and has a lossless compression so you can save as much as you want without losing any detail or colour.

What is a GIF?
A GIF image is graphics interchange format that is a bitmap image that supports up to 8 bits per pixel that allows up to 256 distinct colours. This type of graphic also allows for animation that is a good thing to use for internet bloggers.

What is resolution?
The resolution of an image is the amount of pixels that image has, the more pixels/resolution of an image would make the image a higher quality e.g. HD image or now even a Blu ray image. The resolution of an image also changes if the image is for printing that needs 300 DPI (dots per inch) and an image that only needs to be on a computer only needs 72 DPI because it doesn't need to change size so it stays the same.