16 Questions
What is one of the primary uses of both linear and non-linear filtering in image enhancement?
Noise removal
What type of noise is commonly targeted for removal using different filters in image enhancement?
'Salt and pepper' noise
What is the effect of mean filtering on an image?
Smoothes the image by replacing each pixel with the mean value from its neighborhood
Which type of noise does the 'Isp' variable represent in the given code snippet?
'Salt and pepper' noise with 0.03 intensity
What is the primary purpose of adding noise to an image in the given code snippet?
To simulate real-world scenarios
How does a mean filter differ from a median filter in image processing?
A mean filter tends to blur images more than a median filter
What is a drawback of mean filtering?
It is not robust to large noise deviations in the image
What is the main advantage of median filtering over mean filtering?
It is better at preserving sharp high-frequency detail
How does increasing the neighborhood size for mean filtering affect the resulting image?
It causes blurring and loss of high-frequency image detail
What type of noise is best dealt with using a measure that is robust to statistical outliers?
'Salt and pepper' noise
What is the effect of applying a median filter to an image with 'salt and pepper' noise?
It preserves sharp high-frequency detail while eliminating the noise
How does the median filter compare to the mean filter in terms of computational cost?
The median filter has higher computational cost
What does it mean when a filter is described as 'robust to statistical outliers'?
It is unaffected by extreme values in the data
Why is mean filtering not effective for 'salt and pepper' noise?
'Salt and pepper' noise consists of statistical outliers which mean filtering is not robust to
In general, what are the drawbacks of mean filtering?
'Salt and pepper' noise remains visible within the image
'Salt and pepper' noise consists of:
'Statistical outliers'
Explore the application of various filters for removing typical noise, such as 'salt and pepper' and Gaussian noise, in the context of image enhancement. This quiz covers the primary uses of linear and non-linear filtering and provides hands-on examples using MATLAB.
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