How many pixels is each image made up

What do you notice about each of the images? See if you can see

Be able to talk confidently about pixels, bitmaps and resolution in relation to images.

Key Terms – What do these mean? Discuss and come up with an answer

Key Terms – What do these mean? Pixel – the smallest possible dot on

Standard Definition / High Definition / Ultra High Definition DVDs now come in 3

Colour Depth The image below is made up of dots. The dots can only

Increasing the number of colours As you increase the number of colours used in

Task – Colour How many binary values would be needed to represent the colours

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How many pixels is each image made up of. Multiply the numbers together and stick in your folder. 420 x 640 210 x 320 110 x 160 60 x 80 17 January 2022

What do you notice about each of the images? See if you can see a link to the numbers you have just calculated. 420 x 640 268800 pixels 210 x 320 67200 pixels 110 x 160 17600 pixels 60 x 80 4800 pixels. 17 January 2022

Be able to talk confidently about pixels, bitmaps and resolution in relation to images. Be able to calculate colour depths for some simple bitmap images. 17 January 2022

Key Terms – What do these mean? Discuss and come up with an answer for each. Pixel – Bitmap – Resolution - 17 January 2022

Key Terms – What do these mean? Pixel – the smallest possible dot on a computer screen which can have its colour set independently. Images are made up of pixels. Bitmap – A set of bits that represent a graphic image, with each bit or group of bits corresponding to a pixel in the image. Resolution – The number of pixels per square inch on the computer screen. The higher the resolution the better the picture. 17 January 2022

Standard Definition / High Definition / Ultra High Definition DVDs now come in 3 formats. What is the difference between each of the formats above? How many dots per inch does each of the above display? 17 January 2022

Colour Depth The image below is made up of dots. The dots can only be black or white. Note 8 x 8 grid. 1= white, 0 = black so can be represented by 1 binary digit 11000011 Task – Now complete this for row 4 and row 8. 17 January 2022

Increasing the number of colours As you increase the number of colours used in an image the number of digits needed to represent those colours goes up. How many bits would be needed to represent the colours above? 17 January 2022

Increasing the number of colours As you increase the number of colours used in an image the number of bits needed to represent those colours goes up. 000 001 010 011 100 101 110 111 How many bits would be needed to represent the colours above? 17 January 2022

Task – Colour How many binary values would be needed to represent the colours below. Come up with values for each colour? 17 January 2022