5 Questions
What is the main difference between analog and digital images?
Analog images are continuous while digital images are discrete
How is a digital image represented?
As a matrix of discrete samples
What is the purpose of integrating and sampling analog data in a spatial domain to obtain a digital image?
To represent the continuous image as discrete samples
What type of domain and range does an analog signal have?
Continuous domain and range
Why do we need to store digital image numbers with finite precision when using a computer?
To manipulate signals by using computer
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
Test your knowledge of the differences between analog and digital image data with this quiz. Explore concepts such as pixels, brightness, and color representation in images, and learn about common imaging technologies like CAT and MRI scans.
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