Image Pre-processing Quiz

What is the primary purpose of edge detectors in image processing?

• To enhance color saturation

• To locate sharp changes in intensity

• To increase image resolution

• To reduce image noise

Which operator is known for its high sensitivity to noise?

• Sobel operator

• Roberts operator

• Prewitt operator

• Canny edge detector

What does the Canny edge detector aim to minimize?

• Processing time

• Multiple responses to a single edge

• Image size

• Noise levels

What is the main advantage of using the Laplacian operator?

• It detects edges in color images

• It enhances color contrast

• It is invariant to rotation

• It is computationally inexpensive

What is the purpose of Gaussian smoothing in edge detection?

• To sharpen edges

• To reduce noise before finding edges

• To increase image brightness

• To enhance color details

Which of the following is a disadvantage of zero-crossing edge detection?

• It is too fast

• It can lose sharp corners

• It is not sensitive to noise

• It requires high computational power

What does the term 'scale-space image' refer to?

• An image with increased brightness

• An image with reduced noise

• A representation of an image at different resolutions

• An image with enhanced colors

What is the main goal of image restoration techniques?

• To apply filters for better visualization

• To enhance colors

• To increase image size

• To reconstruct the original image from a degraded version

Which filtering method is commonly used in image restoration to minimize error?

• Bilateral filtering

• Gaussian filtering

• Inverse filtering

• Median filtering

What is the purpose of hysteresis thresholding in edge detection?

• To enhance color contrast

• To eliminate spurious responses

• To increase image resolution

• To reduce processing time