Question

7. The Eigen vectors and eigen values of the 2nd moment matrix in Harris detector represents, (a) The dominant edge orientation, (b) The direction where the largest changes of the pixel values will incur in the detection window, (c) The rate of change in detection window pixel average values (d) The probability of a

Answer 1

Answer 7.

Eigen Values and Eigen Vectors of second moment matrix in Harris Detector represents the direction where the largest change of pixel value will inccur in detection window.

So option B is correct.

Answer 8.

Largest Value of Eigen Value tells us the Domi ant Edge Orientation.

So option A is correct.

Answer 9.

SOFT point is detected if extremum in Scale Space Response.

Ai option A is correct.

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Answer 19.

Rotation Invariance in SIFT is achieved by finding scale and spatial extrema.