The Kitten Effect

a vast herd of cute kittens

One thing I’ve noticed with image-generating algorithms is that the more of something they have to put in an image, the worse it is.

I first noticed this with the kitten-generating variant of StyleGAN, which often does okay on one cat:

alternative for shocked_pikachu.png

but is terrible at a crowd of kittens.

A few years later, Dall-E 2 is a LOT more coherent despite having a larger job to do. But it’s still susceptible to the kitten effect.

One kitten:

“A cute kitten in a basket”

Two kittens:

“Two cute kittens in a basket”

Ten kittens:

“Ten cute kittens in a basket”. Note: the kittens are all happy and doing great because when you are a virtual kitten it doesn’t matter if you have extra earholes in the middle of your face.

A vast herd of cute kittens thundering across the plain:

“A vast herd of cute kittens thundering across the plain” These virtual kittens are also all healthy and happy. The one with extra eyes in its stomach is great at pouncing.

Similarly, there’s a huge difference in quality between a single dog and a herd of them.

A dog running across a field, matte painting

Vast herd of millions of dogs thundering across the plain, matte painting. They may look a bit odd, but they’re all very good dogs.

And it’s not just animals, of course. Here’s the kitten effect played out in lucky charms marshmallows:

A single lucky charms marshmallow piece on a plate:

a single lucky charms marshmallow piece on a plate, labeled with the name of the shape:

A labeled list of lucky charms marshmallows:

It was not obvious to me that this should be so. If it can make one kitten, why can’t it make ten of equal quality?

My theory is this is may actually be not a numbers thing but a size thing. When I asked Dalle-2 to generate a kitten that takes up less of an image, the kitten gets way, way worse.

“A kitten sitting at the far end of a large room”.

It’s not out of pixels to make the detail with – note the sharpness of the wood grain. But at this scale it has run out of something nonetheless.

It does make DALL-E 2’s eye test charts particularly mean.

Bonus post! In which I get DALL-E 2 to look increasingly closely at a giraffe.

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