Resolution/Colour Depth

Resolution

The resolution of an image is determined by the number of dots/pixels which make up the image.  This could be either the number of pixels that make up an image on screen or the number of dots that make up an image which is printed. An image will be more detailed and sharper if more dots are used to create the image. The more of these that there are on the image the better quality the image will be for example, if I were to take a picture with a 8 megapixel camera and take the same picture with a 12 megapixel camera, the image from the 12 megapixel camera will be bigger and better, zooming in will be more possible were as if I were to try zoom in close with the 8 megapixel image it may become more blurry and hard to make out.

Image resolution is a term that is used for describing how images are made up, resolution is for bitmap images. Bitmap images are made up of tiny dots (pixels). The colour resolution will depend on how many pixels there are, the more pixels there are means the more resolution of the image there will be. If a bitmap is used, information needs to be stored for the image regardless of its size. However, this does not apply to vectors, as the resolution only needs to be made when the image is printed.

There will be a better quality of an image if there is more resolution as the image can hold more detail.

Color depth

Colour depth is the term that describes how many different colours the image holds and the color depth in an image is the number of pixels in the bitmap image that indicates colors and resolution. As you can see from the image below the color is more noticeable and smooth in the higher megapixel camera.

When there is more colour depth this means the image will look more realistic, this is because the image will have more appropriate shades of colours for certain sections of the image.

The colour depth of an image is the number of colours which are used in that image. The more colours used, the more realistic the image will be. With bitmap images, the colour depth which is chose, will affect the final size of the image. Monochrome, Greyscale, Palleted, 16 Bit Colour, 24 Bit Colour and 32 Bit Colour are all examples of colour models.