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They actually use the reverse test to train the generator, and to score which image is most relevant to the prompt from the many images given by the generator.
by m00x 4y ago
They actually use the reverse test to train the generator, and to score which image is most relevant to the prompt from the many images given by the generator. Dall-E does this using the OpenAI CLIP model.
You can see the mini version here using this exact logic https://wandb.ai/dalle-mini/dalle-mini/reports/DALL-E-Mini-Explained--Vmlldzo4NjIxODA https://wandb.ai/dalle-mini/dalle-mini/reports/DALL-E-Mini-E...
- masswerk 4y agoWhat I'm aiming at is about what is shown by an image, not what is in an image. Take for example the images for "A digital art picture of a robot child riding a llama with a bell on its tail through a desert", which Scott Alexander counts as a win. The first image actually shows a merry llama, a robot, which is unmistakably a robot child, riding the llama and it's clearly a desert scene. If we forget for a moment about the missing bell, it's probably the best picture. But it is also very blunt in composition. I can't imagine why anybody should have made this image. Maybe, if somebody approached a designer, like, "See, we have this wooden toy cube and need an illustration for this face of the cube. What about a cute picture of a robot child riding a llama with a bell on its tail through a desert?" – But, at closer inspection, there's something sinister going on: it's rather the llama that is leading the robot child by a rein, not the other way round. – I mean, this is meant to be a cute toy! And where is the bell? We need to talk about that contract again… The second image is undisclosed, so we can't really say anything about this. The third image is rather special. The llama seems to be robotic as well, the robot, which is – again – clearly a child, seems to be not only riding the llama, but both appear somehow integrated into a single unit, which cumulates in the robot child's face screen. There is an eerie feeling about this image. The fact, that the bell seems to be attached to the rein as some kind of link between the llama and its rider doesn't exactly help. (There's also a conic extrusion at the back of the llama, but I'd rather interpret this as part of the llama, and it's not attached to its tail.) The composition in its flat side view produces a tension focusing towards the left side of the frame, on something, which is not shown, but apparently a vital part of the story. While I might notice the mountain in the background, I'd probably forget to write home about the scene being set in the desert. But I would note that we're missing context to understand this image and what may be shown by it. The fourth image, finally, is clearly Star Wars, robot edition. However, no bell. ("A robot child riding a llama with a bell on its tail through a desert" – "Ah, you mean Star Wars!") I'm not even sure which of these images Alexander did pick as a winner. And I would describe neither image by the prompt, nor would I dare to imagine that a human had chosen these exact means to show what is described in the prompt. Having said that, thanks for the link to the DALL-E Mini paper!