Question 33
The gradient of an image I points in the direction of the most rapid change in intensity. Taking image derivatives accentuates (a) ______________ frequencies and hence amplifies noise, since the proportion of noise to signal is larger at (b) _______________ frequencies. The common solution is to smooth the image prior to computing gradients.
Based on the above data, answer the given subquestions.
Enter the correct answer for Blank (a) ________________
NOTE: Enter the exact answer without any extra space in the beginning or at the end.