Slide 1

Slide 1 text

Computer Vision Project 3 Image mosaics Ly, Pant

Slide 2

Slide 2 text

Decisions ● ANMS ○ Not really working until we used imregionalmax. ● Descriptors ○ Rotations using atan Iy./Ix ● Ransac ○ 50 random pulls of 4 points ● Mosaic merging ○ Homography applied to all pixels of source image ○ Results in holes in destination

Slide 3

Slide 3 text

ANMS - 50

Slide 4

Slide 4 text

ANMS - 200

Slide 5

Slide 5 text

Test Mosaic

Slide 6

Slide 6 text

Bridge Mosaic (Ransac poor)

Slide 7

Slide 7 text

Bridge Mosaic (Better--luck?)

Slide 8

Slide 8 text

Chicago Mosaic (3-images)

Slide 9

Slide 9 text

Quad Mosaic

Slide 10

Slide 10 text

Quad Mosaic (Fixed later)

Slide 11

Slide 11 text

Tips ● Skipped ANMS by using other code for non-maximal suppression in order to work on other tasks ● Did not implement inverse homography to copy pixels ○ Results in holes in image, especially when there are perspective transformations (Quad Mosaic) ○ (Later implemented.) ● Perseverance!

Slide 12

Slide 12 text

Problems ● ANMS slow. ● Crashed matlab by not setting bounds on images ○ Too much memory consumed ● Did not implement inverse homography to copy pixels ○ Results in holes in image, especially when there are perspective transformations (Quad Mosaic) ○ (Implemented later using inpolygon) ● Ran out of time!