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Questions and Answers
What is the main difference between analog and digital images?
What is the main difference between analog and digital images?
- Analog images are continuous while digital images are discrete (correct)
- Analog images have infinite precision, while digital images have finite precision
- Analog images are always black and white, while digital images can be colored
- Analog images are stored in a matrix, while digital images are not
How is a digital image represented?
How is a digital image represented?
- As a single pixel
- As a set of analog values
- As a continuous signal with infinite precision
- As a matrix of discrete samples (correct)
What is the purpose of integrating and sampling analog data in a spatial domain to obtain a digital image?
What is the purpose of integrating and sampling analog data in a spatial domain to obtain a digital image?
- To create an infinite range of pixel values
- To represent the continuous image as discrete samples (correct)
- To convert digital images to analog images
- To increase the precision of the image
What type of domain and range does an analog signal have?
What type of domain and range does an analog signal have?
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Why do we need to store digital image numbers with finite precision when using a computer?
Why do we need to store digital image numbers with finite precision when using a computer?
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Study Notes
Analog vs Digital Images
- Analog images are continuous signals, whereas digital images are discrete representations of images
- Analog images have infinite detail, whereas digital images have finite detail
Digital Image Representation
- A digital image is represented as a matrix of pixels, with each pixel having a specific intensity value
- Each pixel is assigned a digital value, which is a finite representation of the analog intensity value
Analog to Digital Conversion
- Integrating and sampling analog data in a spatial domain allows us to obtain a digital image
- This process converts continuous analog data into discrete digital values
Analog Signal Characteristics
- An analog signal has a continuous domain (time) and a continuous range (amplitude)
Digital Image Storage
- Digital image numbers are stored with finite precision in a computer due to memory constraints
- Finite precision is necessary to store and process digital images efficiently
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