Bitmap File Sizes Flashcards

All 4 cards in this deck

What is the formula for the file size of a bitmap image, in bits?

width (pixels) $\times$ height (pixels) $\times$ colour depth (bits)

True or false? Width $\times$ height $\times$ colour depth gives a bitmap's file size in bytes.

False. It gives the size in bits; divide by 8 to get bytes.

What is the effect of increasing the colour depth of an image?

More colours can be stored so the quality improves, but the file size increases.

What is the effect of increasing the image size (the number of pixels) of a bitmap?

The image has more pixels, so it can show more detail, but the file size increases.