Digital Image Processing Quiz

What does image restoration concern?

• Removal of degradations

• Addition of noise

• Enhancement of optical effects

• Creation of blurring

What is noise in the context of image processing?

• Enhancement of image quality

• Improvement of camera motion

• Reduction of spatial filter effects

• External disturbance in the image signal

Which type of noise is also known as impulse noise?

• Gaussian noise

• Speckle noise

• Salt and pepper noise

• Periodic noise

What does salt and pepper noise appear as in an image?

• Smooth gradient colors

• Randomly scattered white or black pixels

• Highly saturated colors

• Blurred edges

Which method is used to clean salt and pepper noise using an outlier approach?

• Median filtering

• Average filtering

• Adaptive filtering

• Gaussian filtering

What is the purpose of image averaging in cleaning Gaussian noise?

• Introducing more noise

• Enhancing sharpness

• Increasing noise levels

• Smoothing out variations in pixel values

Which method is used to clean Gaussian noise by considering local mean and variance?

• Adaptive filtering

• Average filtering

• Gaussian filtering

• Median filtering

What is the advantage of adaptive filtering in cleaning Gaussian noise?

• It blurs the image further

• It removes all details

• It introduces more noise

• It considers local properties for noise removal

What type of noise is caused by external disturbances in the image signal?

• Periodic noise

• Salt and pepper noise

• Gaussian noise

• Speckle noise

Which noise type is characterized by randomly scattered white or black pixels?

• Salt and pepper noise

• Speckle noise

• Periodic noise

• Gaussian noise