vector and bitmap

colour depth and storage

Colour depth

colour depth refers to the number of bits that is used to store the colour of the image. It follows the colour scheme RGB which stands for Red, Green and blue, each colour is made up of each of these colours.
1 bit colour

Is a black a white image. the bit value 1 sets it to white and the o sets it to black.

12-bit direct colour

4 bits or 16 possible levels are allocated for each of the RGB components allowing 4,096 different colours.

memory requirements.

so a 8 by 8 bitmap image uses 8 bit colour scheme 3R, 3G and 2B then it uses 64 bytes.



Bitmap images are made up lots of different pixels where each one has its own colour. However in doing this it makes it become distorted when zoomed in as all of the pixels are different so they don’t sit flush. Bitmap images are larger as it has to save each pixels differently as they each have their own colour which make the file large.



Vector images, don’t save it as pixels is saves it a one big object, which makes enlarging the image better as it enlarges the lines that connect the image not the pixels so that this makes it look normal. It like coordinates, when you move the points further away the image is still the same. Vector images are smaller as they don’t have to save each pixels as its own bit it can save it all as one big one, this makes it smaller and easier to use.

RGB colour system.

The RGB colour system that Photoshop uses

Red Green Blue. An additive colour space that directly translates to the red, green, and blues used in computer monitors. Each colour is described by the strength of its red, green, and blue components