Researcher

Yoad Tewel

Yoad Tewel is a computer vision researcher whose publications span zero-shot image captioning, object grounding and text-to-image generation. He coauthored Perfusion, which personalizes generated images, and ConsiStory, which keeps subjects consistent across prompts. His 2025 papers introduced methods to control object counts and insert objects into images from text instructions, and in 2026 he coauthored a framework for unpaired image and video editing. As of October 2026, he is a research scientist at NVIDIA Research and a Computer Science PhD candidate at Tel-Aviv University under Professor Lior Wolf.

Now at
NVIDIA

Timeline

  1. 2022

    Zero-shot image captioning

    In 2022, he coauthors ZeroCap, a zero-shot method that combines a visual-semantic model with a large language model to generate descriptive text from an image without extra training or tuning.

  2. 2022

    Open-world object grounding

    In 2022, he coauthors a weakly supervised, open-world phrase-grounding method that returns object boxes and descriptive phrases from an image without text input.

  3. 2023

    Perfusion for personalization

    In 2023, he coauthors Perfusion, a text-to-image personalization method that uses dynamic rank-1 updates to adapt a model to personalized concepts.

  4. 2024

    Consistent text-to-image generation

    In 2024, he coauthors ConsiStory, a training-free method that shares a pretrained model's internal activations to keep subjects consistent across images while preserving prompt alignment.

  5. 2025

    Counting objects with prompts

    In 2025, he coauthors Make It Count, whose CountGen method generates the number of objects specified in a prompt while keeping a natural layout.

  6. 2025

    Training-free object insertion

    In 2025, he coauthors Add-it, a training-free method that extends diffusion models' attention to add objects to images from text instructions.

  7. 2026

    Bootstrap Your Generator

    In 2026, he coauthors Bootstrap Your Generator, a framework for unpaired image and video editing that uses a pretrained model's knowledge without paired data.

  8. As of October 2026

    Research at NVIDIA and Tel-Aviv

    He is a research scientist at NVIDIA Research and a Computer Science PhD candidate at Tel-Aviv University, working in the Deep Learning Lab under Prof. Lior Wolf.

Career

  1. NowNVIDIAResearch Scientist

Education

  1. Tel Aviv UniversityPhD

Sources and credits

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  1. ZeroCap: Zero-Shot Image-to-Text Generation for Visual-Semantic Arithmetic openaccess.thecvf.com. Checked 20 October 2026.
  2. What is Where by Looking: Weakly-Supervised Open-World Phrase-Grounding without Text Inputs proceedings.neurips.cc. Checked 20 October 2026.
  3. Key-Locked Rank One Editing for Text-to-Image Personalization arxiv.org. Checked 20 October 2026.
  4. Training-Free Consistent Text-to-Image Generation arxiv.org. Checked 20 October 2026.
  5. Make It Count: Text-to-Image Generation with an Accurate Number of Objects make-it-count-paper.github.io. Checked 20 October 2026.
  6. Add-It: Training-Free Object Insertion in Images with Pretrained Diffusion Models mlanthology.org. Checked 20 October 2026.
  7. Bootstrap Your Generator: Unpaired Visual Editing with Flow Matching arxiv.org. Checked 20 October 2026.
  8. Yoad Tewel — Research Scientist, NVIDIA Research yoadtew.github.io. Checked 20 October 2026.