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WorksheetsTypes of Noise in Digital Images
Total questions: 15
Worksheet time: 8mins
What is the appearance of luminance noise in digital images?
Noticeable horizontal/vertical stripes
Random variations in brightness
Distorted patches of colored pixels
Scattered black and white pixels
Which type of noise is often pronounced in the blue channel?
Banding Noise
Gaussian Noise
Chrominance Noise
Luminance Noise
What causes banding noise in digital images?
Sensor read-out issues
Demosaicing errors
Faulty sensor pixels
Coherent imaging systems
Which noise type is characterized by a granular, high-frequency texture?
Salt-and-Pepper Noise
Speckle Noise
Poisson Noise
Fixed Pattern Noise
What is a common cause of Gaussian noise?
Small sensor size
Long exposure
High ISO
Electronic circuit noise
Which noise type appears as scattered black and white pixels?
Poisson Noise
Chrominance Noise
Salt-and-Pepper Noise
Speckle Noise
What is a primary cause of Poisson noise?
Aggressive post-processing
Electronic interference
Random nature of light
Sensor manufacturing imperfections
Which noise type is associated with consistent, non-random patterns?
Banding Noise
Fixed Pattern Noise
Chrominance Noise
Luminance Noise
What is a common source of noise in digital images?
High ISO
Large sensor size
Low ISO
Short exposure
What is a potential impact of noise on digital images?
Increased color accuracy
Improved image analysis
Reduced dynamic range
Enhanced detail
Which filter type averages pixel values in a neighborhood?
Gaussian Blur
Median Filter
Custom Kernel
Mean Filter
Which filter is good for reducing salt-and-pepper noise?
Custom Kernel
Gaussian Blur
Median Filter
Mean Filter
What is a weakness of the Gaussian Blur filter?
Slower processing
Can still blur important details
Blurs edges
Can cause distortion if poorly designed
What is a strength of using a custom kernel filter?
Good for salt-and-pepper noise
Simple and fast
Smooths naturally
Highly flexible
What can aggressive post-processing introduce in digital images?
Reduced sensor temperature
Improved dynamic range
Artifacts resembling noise
Enhanced color accuracy
