Using cifar$100$ T: Plot the tsne output again $--$ but plot the original images at locations given by tsne

Q: Can you see significant structures now? Any groups of similar images? In what sense are they 'similar'?

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#$$hint:$$make$$sure$$you$$scatter$-$plot$$the$$points$,$or$$the$$images$$may

#$$not$$show$$up$!$

np$.$random.seed$(0)$

plt$.$figure$($figsize$=(40,40))$#$$larger$$figure$$may$$be$$better

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There should be groups of 'similar' images, according to some visible pattern.

For example: apparently there is a bunch of images with an object in a center on a white background; another one with sky in the upper part and something else in the lower part. So these would be two patterns.

Q: What other patterns that tSNE picked up on can you distinguish? Is it only about color? Maybe some other features of an image get picked up$?$

Q: Find at least $5$ new patterns, and describe them briefly.

Important question:

Q: Elaborate on why you think tSNE picks up these patterns? This is an important question, elaborate! Make sure your answers highlights your understanding of tSNE and related concepts.

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For each of the $5$ types of patterns you identified before we can select their representative images using their tSNE coordinates.

For example: in my case "the things on a white background", had tSNE coordinates close to $(15,15),$ so I found $10$ images with tSNE coordinates closest to $(15,15).$ I then plotted them in one row.

T: Do the above for your five selected types of patterns.

Q: Did you get the expected images $($namely the ones which you could see on the tSNE plot with images$)?$

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Back to the high dimensional space!

Let's try a similar thing in the original, high$-$dimensional space.

T: Pick a representative image for each of the $5$ patterns, and find $10$ images which are closest in the original high$-$dimensional space. Plot them $($in horizontal rows$).$

keyboard$\_$arrow$\_$down

Important question:

Q: The results are most likely not the same as previously. Do you understand why? This is really important, elaborate! Make sure it's clear you know what's hapenning here.

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