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Computer Vision Project 3 Image mosaics Ly, Pant

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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

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ANMS - 50

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ANMS - 200

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Test Mosaic

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Bridge Mosaic (Ransac poor)

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Bridge Mosaic (Better--luck?)

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Chicago Mosaic (3-images)

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Quad Mosaic

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Quad Mosaic (Fixed later)

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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!

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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!