7. Digital image properties

Multiple Choice

What are the key properties of a digital image?

• Dimension

• File size

• Color depth

• All

Multiple Select

Which of the following are true?
(Select all that apply)
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• This image file is 5,794,752 bits

• This image file is 734 kilobytes

• This image file is 734 KBs

• This image file is 724,344 bytes

Multiple Choice

What are the key properties of an image that can be defined as how many pixels high and wide in the image?

• Pixel size

• Dimension

• Resolution

• Colour depth

Multiple Choice

What is resolution?

• It is the total number of pixels in an image
• It is a measure of how many pixels are used in a one square of the image

• It is a measure of how much an image has been compressed
• It is a measure of how big an object is

Multiple Choice

What is the formula to calculate the file size in bits?

• File size = pixels x colour depth

• File size = height x width

• File size = width x colour depth

• File size = height x colour depth

Multiple Choice

How many bits are needed to store the 2-bit letter graphic shown in the image?

• 24 bits

• 42 bits

• 84 bits

• 64 bits

Multiple Choice

What is the primary benefit of using a higher color depth in a bitmap image?

• It allows for a smaller file size

• It enables the image to be processed faster

• It allows for a wider range of colors and more detailed images

• It reduces the need for compression

Multiple Choice

What determines the maximum number of colors that can be displayed in a bitmap image?

• The file format (e.g., JPEG, PNG)

• The size of the image file

• The color depth of the image

• The resolution of the image

Multiple Choice

What happens to the file size of a bitmap image when the color depth is increased from 8 bits to 16 bits?

• The file size remains the same

• The file size doubles

• The file size increases but not necessarily doubles

• The file size quadruples

Multiple Choice

How does the file size change when the color depth is reduced from 24 bits to 8 bits?

• The file size reduces to one-third of the original size

• The file size remains the same

• The file size reduces to one-eighth of the original size

• The file size is reduced by half

Multiple Choice

Why do image-sharing websites often offer multiple download options for the same image?

• To let users pick different colours for the image

• To let users choose between different resolutions and file sizes depending on their needs

• To make the image look more attractive

• To prevent the image from being downloaded

Multiple Choice

What are three image criteria that must be checked before uploading to the web?

• DPI, readability, and web safe tex
• file size, color settings, PDF settings
• file size, dimensions, and optimization
  
• optimization, DPI, and color setting
  

Multiple Choice

Resolution is the number of pixels in an image, what is the resolution of this image?

• 8 pixels

• 32 pixels

• 64 pixels

• 2 pixels

Poll

How confident do you feel about this topic now?

• Very confident
• Somewhat confident
• Not confident