# Images

• Images are represented by a form of encoding similar to ASCII and Unicode
• Images are made up of pixels
• The resolution of an image is the number of pixels in an images
• This is found by multiplying the width by the height
• A higher resolution means more detail
• The number of colors that can be represented in a pixel is determined by the color depth
• To calculate the number of colors in pixel available, you must use $$2^n$$
• Where n is the bit depth
• To calculate the size of an image (in KiB), use the formula: $$\frac{width \times height \times bit\ depth}{8 \times 1024}$$
• Bitmap images are images made up of pixels
• If bitmap images are resized, the quality decreases
• Vector images are made from mathematical calculations
• They can be resized losslessly