Karen X. Cheng Profile picture
Dec 5 7 tweets 4 min read
NeRF update: Dollyzoom is now possible using @LumaLabsAI
I shot this on my phone. NeRF is gonna empower so many people to get cinematic level shots
Tutorial below -

-
#NeRF #NeuralRadianceFields #artificialintelligence #LumaAI
2/ First, stand still. Have a friend take a quick video of you
Capture the area in front of you and behind you
3/ Here's the raw footage btw for anyone curious
(Feel free to download it so you can follow along)
4/ Upload footage to @LumaLabsAI
Wait (about 30 minutes) while Luma turns it into a NeRF
Disclosure: I am an advisor for Luma. They've asked me to test some features. All opinions are my own.
@LumaLabsAI 5/ Luma just released a new feature - the ability to change focal length. That's what we'll be using to achieve the dolly zoom effect

The trick to getting a dolly zoom is to keep the body size the same

Change the distance, then use focal length to keep your body size the same
@LumaLabsAI 6/ My low tech solution to measuring my body size: I stick a post-it note to my monitor

Then I increase the distance and then adjust the FOV so my body size stays the same

Lastly, I added some speed ramping in After Effects and color grading in Premiere
7/ Kinda crazy all that was made from a quick phone video

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More from @karenxcheng

Oct 25
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
Read 8 tweets
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
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
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
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

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