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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?

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? Correct Answer If definition used has a negative center coefficient, then subtraction is done

Applying Laplacian produces image having featureless background which is recovered maintaining the sharpness of Laplacian operation using original image either added if Laplacian definition used has a positive center coefficient or subtracting result from original image if has a negative center coefficient.

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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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