Q. Why is scaling of Laplacian filtered images necessary?

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Q. An enhanced image can be obtained as: g(x,y)=f(x,y)-∇^2 f(x,y), where Laplacian is being subtracted from f(x, y) the input image. What does this conclude?

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Q. Computing the Fourier transform of the Laplacian result in spatial domain is equivalent to multiplying the F(u, v), Fourier transformed function of f(x, y) an input image, and H(u, v), the filter used for implementing Laplacian in frequency domain. This dual relationship is expressed as _________

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Q. Assuming that the origin of F(u, v), Fourier transformed function of f(x, y) an input image, has been correlated by performing the operation f(x, y)(-1)x+y prior to taking the transform of the image. If F and f are of same size M*N, then which of the following is an expression for H(u, v), the filter used for implementing Laplacian in frequency domain?

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Q. Assuming that the origin of F(u, v), Fourier transformed function of f(x, y) an input image, has been correlated by performing the operation f(x, y)(-1)x+y prior to taking the transform of the image. If F and f are of same size M*N, where does the point (u, v) =(0,0) shifts?

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Q. Assuming that the origin of F(u, v), Fourier transformed function of f(x, y) an input image, has been correlated by performing the operation f(x, y)(-1)x+y prior to taking the transform of the image. If F and f are of same size, then what does the given operation is/are supposed to do?

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Q. The Laplacian in frequency domain is simply implemented by using filter __________

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Q. An image has significant edge details. Which of the following fact(s) is/are true for the gradient image and the Laplacian image of the same?

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Q. Gradient have some important features. Which of the following is/are some of them?

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Q. Gradient is used in which of the following area(s)?

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Q. What is the sum of the coefficient of the mask defined using gradient?

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Q. A First derivative in image processing is implemented using which of the following given operator(s)?

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Q. Subtracting Laplacian from an image is proportional to which of the following?

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Q. “For very large value of A, a high boost filtered image is approximately equal to the original image”. State whether the statement is true or false?

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Q. If we use a Laplacian to obtain sharp image for unsharp mask filtered image fs(x, y) of f(x, y) as input image, and if the center coefficient of the Laplacian mask is negative then, which of the following expression gives the high boost filtered image fhb, if ∇^2 f represent Laplacian?

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Q. Which of the following gives an expression for high boost filtered image fhb, if f represents an image, f blurred version of f, fs unsharp mask filtered image and A ≥ 1?

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Q. Which of the following mask(s) is/are used to sharpen images by subtracting a blurred version of original image from the original image itself?

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Q. A mask of size 3*3 is formed using Laplacian including diagonal neighbors that has central coefficient as 9. Then, what would be the central coefficient of same mask if it is made without diagonal neighbors?

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Q. Applying Laplacian produces image having featureless background which is recovered maintaining the sharpness of Laplacian operation by either adding or subtracting it from the original image depending upon the Laplacian definition used. Which of the following is true based on above statement?

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Q. Applying Laplacian has which of the following result(s)?

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