Understanding Image Representation and Compression

Which of the following best describes how images are represented in binary?

• Images are stored as a series of hexadecimal values.

• Images are stored as a grid of pixels, each represented by binary numbers.

• Images are stored as a single binary number representing the entire image.

• Images are stored as a series of ASCII characters.

What is metadata in the context of digital images?

• The binary data that makes up the image itself.

• Additional information about the image, such as dimensions and colour depth.

• The file size of the image.

• The software used to create the image.

What is the main difference between lossy and lossless compression?

• Lossy compression reduces file size without losing any data, while lossless compression loses some data.

• Lossy compression loses some data to reduce file size, while lossless compression retains all data.

• Lossy compression is faster than lossless compression.

• Lossy compression is used only for text files, while lossless is used for images.

Which file format is typically associated with lossless compression?

• JPEG

• PNG

• MP3

• GIF

How does compression impact the quality of an image?

• Compression always improves image quality.

• Compression can reduce image quality, especially with lossy methods.

• Compression has no effect on image quality.

• Compression increases the file size, thus improving quality.

Which of the following is NOT typically considered metadata for an image file?

• Image resolution

• Date and time the photo was taken

• The number of colours in the image

• The content of the image

What is the primary purpose of image compression?

• To increase the colour depth of an image.

• To reduce the file size of an image for storage and transmission.

• To convert the image to a different file format.

• To enhance the image quality.

Which of the following file formats is most likely to use lossy compression?

• BMP

• TIFF

• JPEG

• SVG

What type of information might be included in the metadata of a digital image?

• The binary code of the image

• The camera model used to take the photo

• The number of pixels in the image

• Both B and C

What is a common disadvantage of using lossy compression for images?

• It increases the file size significantly.

• It can result in a loss of image quality.

• It makes the image incompatible with most software.

• It requires more processing power to decompress.