Representing Images Flashcards

All 6 cards in this deck

How is a bitmap image represented in a computer?

As a grid of pixels, with the colour of each pixel stored as a binary value.

What is colour depth?

The number of bits used to store the colour of each pixel.

What is the resolution of an image?

The number of pixels in the image, given as width $\times$ height.

What is metadata in an image file?

Data stored about the image itself, such as width, height, colour depth and date created.

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.

True or false? Increasing the resolution of an image reduces its file size.

False. More pixels are stored, so the file size increases.