Bitmap Images Flashcards

1️⃣ Familiarise yourself with the flashcards:

Look through all the flashcards to see what's on both sides.
Make sure you understand the information on each card. If something's unclear, click the link to the revision notes at the bottom of the page for more details.

2️⃣ Test yourself:

Look at the question or prompt on each card and try to remember the answer before flipping it over.
Check the answer and make a note of any cards you find challenging and need to go over more.

3️⃣ Consistently Review and Practice:

Use spaced repetition: spend more time on the cards you struggle with and go over them more often.
Regularly review all the flashcards to help you better understand and retain the information over time.

Note: We may include questions that have multiple correct answers. It's useful to remember specific examples to understand these concepts better.

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What is a bitmap image?

An image made of a grid of tiny pixels. Each pixel stores one colour.

The smallest dot in a bitmap image. It is one point of colour.

The number of pixels across and down, for example 1920 by 1080. More pixels give more detail.

The number of bits used for each pixel. More bits mean more possible colours.

Use 2 to the power of the bits. For example, 8-bit lets you have 256 colours.

Each pixel uses 24 bits, usually 8 bits for red, 8 for green, and 8 for blue. It can show about 16.7 million colours.

Each pixel uses 1 bit. A 0 can mean white and a 1 can mean black.

An image that uses only shades of grey. For example, 8-bit greyscale has 256 shades.

As three numbers for red, green, and blue. The mix makes the final colour.

Extra data about the image, like width, height, colour depth, and maybe the date.

You start to see the pixels. Each pixel gets bigger, so edges look jagged.

A list of colours stored once. Each pixel holds a small index number that points to a colour in the list.