Bitmap Images

•  Can be saved/stored in a variety of formats so that the webpage can be viewed on all computer platforms
• Can be output from many applications so easy to produce
• Can be created from the pixel arrays in memory
• Can display vast range of colours depending on bits per pixel
• Can display subtle gradations of shades/colour/greyscales as it is made of pixels
• Best for photo-realism/continuous tones compared to [[vector]] images so images of advertised items appear more realistic
• Individual pixels can be modified to customise/edit the image so images of advertised items are more appealing/attractive
• Can translate easily to dot-format output for use with CRTs/printers
• Can be used in simple animations e.g. Animated gifs
• Can be compressed so that file size is reduced and loads faster. Bitmap images are stored as a collection of tiny dots/squares/ pixels
• Each pixel is assigned a colour
• The pixels are arranged in an order/pattern to create the image
• Bitmap images can distort/lose quality when made larger or smaller 

## how a bitmap (‘raster’) graphic is stored in a computer file

• Made up of pixels
• Each pixel is represented by bits
• 1 to 64 bits per pixel
• Number of pixels depending on colour depth
• Bits representing pixels packed in rows for bmp
• Rows rounded to 32 bit words
• Padding needed for loading into memory locations
• Usually stored from bottom left up to top right of image.