Section C - 4 - Text & Image Representation - Image Represen

How is a bitmap image stored?

Choose three statements that are true.

• Bitmap images are made up of a grid of pixels.

• The colour of each pixel is represented using a binary number.

• Bitmap images use at least 24-bits to store a pixel.

• A pixel is an individual dot of colour.

• Bitmap images are also known as Vector images.

Which of the following is an example of a common image resolution?

• 1024×768

• 72 pixels per inch

• 24-bit

• 16,777,216 colours

Which of the following is a positive impact of a larger image resolution?

• File sizes will be larger

• File sizes will be smaller

• The image can use more colours

• The image has smoother edges

How many colours can be stored with an 8-bit colour depth?

• 2

• 8

• 256

• 16,777,216

Which of the following is a negative impact of a larger colour depth?

• File sizes will be larger

• File sizes will be smaller

• The image can use more colours

• The image has smoother edges

What type of compression reduces file sizes while still maintaining the original quality of the image?

• Lossy

• Lossless

What is the technique used to mitigate the impact of when compression reduces the number of colours in an image?

• Lossing

• Dithering

• Merging

• Gradienting

Which of the following is a reason why you might need to compress an image?

• You need to send it over the internet.

• You have a large storage device to fill up.

• Your software has a maximum PPI setting.

• You need to ensure the image is the best possible quality.