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WorksheetsUnderstanding Image Representation and Compression
Total questions: 11
Worksheet time: 6mins
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.
How does metadata benefit the management of digital images?
It reduces the file size of the image.
It provides additional information for organizing and searching images.
It enhances the visual quality of the image.
It converts the image to a different format.
