Image Processing Quiz

What is the primary goal of local pre-processing in image processing?

• To enhance specific features in an image

• To compress an image

• To convert an image to grayscale

• To add noise to an image

Which of the following techniques is commonly used for image smoothing?

• Sobel operator

• Gaussian filter

• Canny edge detection

• Hough transform

What is the purpose of image smoothing?

• To sharpen the image

• To reduce noise and fine details

• To increase resolution

• To convert an image to binary

Which filter is most commonly used for noise reduction in an image?

• High-pass filter

• Gaussian filter

• Laplacian filter

• Sobel filter

What is the main advantage of using a median filter for smoothing?

• It removes noise while preserving edges

• It enhances the contrast of an image

• It converts an image to grayscale

• It reduces the image resolution

Which of the following is an edge detection method?

• Fourier transform

• Canny edge detector

• Image segmentation

• Run-length encoding

Which of the following is a first-order edge detection operator?

• Laplacian operator

• Sobel operator

• Gaussian filter

• Median filter

The second derivative in edge detection is commonly used for detecting:

• Object boundaries

• Zero crossings

• Noise reduction

• Image smoothing

The Laplacian of Gaussian (LoG) operator is used for:

• Image smoothing and edge detection

• Color segmentation

• Image compression

• Contrast enhancement

The zero-crossing of which derivative is used for detecting edges?

• First derivative

• Second derivative

• Third derivative

• Fourth derivative