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Oct 25 • 8 tweets • 5 min read
1/ Now you can create "drone" shots from your phone footage, thanks to NeRF
Collab with @justLV / software @nerfstudioteam / see below for our process
#NeRF #neuralrendering #artificialintelligence #instantNeRF
2/ Here is the raw footage input (sped up 5x here) which we fed into NeRF Studio
3/ Then @justLV created a camera path inside NeRF studio.

The grey polygons are keyframes, the red line is the path that @nerfstudioteam auto-generates to smooth out the camera path
4/ We were inspired by this shot from @brenthyi , one of the creators of @nerfstudioteam
5/ We've also used Instant-NGP in the past, but have found that @nerfstudioteam does "drone" shots better because of how it handles large unbounded scenes.

Below you can see the same footage fed into Instant-NGP for comparison

6/ Instant-NGP tends to create lots of cloudy artifacts. Those floaters can look really cool and stylistic though - here's a previous NeRF I did with @jperldev that leans into the cloudy look
7/ Btw I held a fake drone controller in my hands to sell the effect lol Image
8/ Throwback to before NeRF was invented, when I had to fake drone shots the old school way

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More from @karenxcheng

Karen X. Cheng Profile picture
Aug 30
1/ Using AI to generate fashion

After a bunch of experimentation I finally got DALL-E to work for video by combining it with a few other AI tools

See below for my workflow -

#dalle2 #dalle #AIart #ArtificialIntelligence #digitalfashion #virtualfashion
2/ First I used DALL-E to generate outfits. I did this by erasing parts of my existing outfit and inpainting over it

Btw when I erased the entire outfit, the results didn't look as good. By keeping parts of the original, DALL-E was able to better match color and lighting
3/ But here’s the challenge. DALL-E works great for individual pictures, but it’s not designed for video. It won’t give you consistency from frame to frame.

Here was my early experiment. See, no consistency between frames
Read 9 tweets
Karen X. Cheng Profile picture
Aug 16
1/ Using AI to imagine alternate worlds🪞
collab w/ 🍃@MichaelCarychao 🦾Sagans

#discodiffusion #aiart #artificialintelligence
@MichaelCarychao 2/ Here's the raw footage. I started off by creating a simple AR filter of two empty white rectangles using Adobe Aero. Shot by @AustinGumban
@MichaelCarychao @AustinGumban 3/ Then @MichaelCarychao generated the nature side. Here's a peek at his behind-the-scenes process. Highly recommend checking out his account for more AI art ideas
Read 7 tweets
Karen X. Cheng Profile picture
Jul 28
1/ I used DALL-E to imagine beyond this painting @OpenAI Inspired by @literallydenis #dalle #dalle2 #artificialintelligence #art
@OpenAI @literallydenis 2/ Something that AI headlines don't always capture is that as a human, you actually have a lot of artistic input in what the AI paints. The AI didn't draw all this automatically - I prompted it to draw certain elements
@OpenAI @literallydenis 3/ Here's a sampling of the prompts I used. For each prompt, I added "painting by Johannes Vermeer" at the end for style Image
Read 5 tweets
Karen X. Cheng Profile picture
Jul 27
1/ Using AI to smooth my footage 😌 with @jperldev. We’re using DAIN, an AI technique that smoothly interpolates frames. #stopmotion #artificialintelligence
2/ For every frame you see, it generates 8 frames in between with incredibly smoothness and accuracy. Its main use case is to create artificial (and very convincing) slow motion on clips, but I thought it'd be interesting to apply it to stop motion to create "impossible" movement
3/ You can try DAIN by going to grisk.itch.io/dain-app. It works on Windows and NVIDIA only (it requires a TON of GPU power) and isn't the easiest to set up or run. But I do believe that this technology will become more mainstream
Read 6 tweets
Karen X. Cheng Profile picture
Jul 6
1/ We used NeRF to get this shot. This entire thing was shot with a phone 🤳 No drones were used @jperldev #photogrammetry #instantNeRF #neuralrendering #artificialintelligence
2/ Here's how - walked around me in circles a few times, pointing his phone at me. We fed the video into Instant-NGP which created a NeRF out of the footage.
3/ It's kinda like a 3D model, but instead of creating mesh+textures it’s more like a point cloud that changes color depending on what angle you view it from. This creates beautiful surreal lighting effects - you can see how the light hits differently as we change camera angles.
Read 8 tweets
Karen X. Cheng Profile picture
Jun 27
I used @OpenAI #dalle2 to create the first ever AI-generated magazine cover for @Cosmopolitan!! The prompt I used is at the end of the video #dalle
1/ For something like this, there was a TON of human involvement and decision-making. While each attempt takes only 20 seconds to generate, it took hundreds of attempts.

Hours and hours of prompt generating and refining before getting the perfect image
2/ I think the natural reaction is to fear that AI will replace human artists. Certainly that thought crossed my mind. But the more I use #dalle2, the less I see this as a replacement for humans, and the more I see it as tool for humans to use - an instrument to play
Read 8 tweets

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