Image Processing - Practical session 5

The DoG scale space is constructed by fitting Gaussians with different 𝝈s to the Laplacian of Gaussian (LoG) scale space.

• True

• False

From one octave to the other, the image size is halved in both horizontal and vertical dimensions.

• True

• False

Octaves are used to deal with smaller images.

• True

• False

For Q levels of keypoints per octave, how many Gaussian scale space levels are needed?

• Q+1

• Q+2

• Q+3

• Q+4

Local extrema detection is performed after thresholding the DoG values in each octave.

• True

• False

Local extrema detection is performed only within an octave.

• True

• False