Search Results for author: Ramin Zabih

Found 19 papers, 5 papers with code

DreamWalk: Style Space Exploration using Diffusion Guidance

no code implementations4 Apr 2024 Michelle Shu, Charles Herrmann, Richard Strong Bowen, Forrester Cole, Ramin Zabih

Text-conditioned diffusion models can generate impressive images, but fall short when it comes to fine-grained control.

Prompt Engineering

MambaMixer: Efficient Selective State Space Models with Dual Token and Channel Selection

no code implementations29 Mar 2024 Ali Behrouz, Michele Santacatterina, Ramin Zabih

Motivated by the success of SSMs, we present MambaMixer, a new architecture with data-dependent weights that uses a dual selection mechanism across tokens and channels, called Selective Token and Channel Mixer.

object-detection Object Detection +3

Stable Estimation of Survival Causal Effects

no code implementations1 Oct 2023 Khiem Pham, David A. Hirshberg, Phuong-Mai Huynh-Pham, Michele Santacatterina, Ser-Nam Lim, Ramin Zabih

Our experiments on synthetic and semi-synthetic data demonstrate that our method has competitive bias and smaller variance than debiased machine learning approaches.

Test-Time Distribution Normalization for Contrastively Learned Vision-language Models

2 code implementations22 Feb 2023 Yifei Zhou, Juntao Ren, Fengyu Li, Ramin Zabih, Ser-Nam Lim

Advances in the field of vision-language contrastive learning have made it possible for many downstream applications to be carried out efficiently and accurately by simply taking the dot product between image and text representations.

Contrastive Learning

Unsupervised Text Deidentification

1 code implementation20 Oct 2022 John X. Morris, Justin T. Chiu, Ramin Zabih, Alexander M. Rush

We propose an unsupervised deidentification method that masks words that leak personally-identifying information.

Named Entity Recognition Named Entity Recognition (NER)

Dimensions of Motion: Monocular Prediction through Flow Subspaces

no code implementations2 Dec 2021 Richard Strong Bowen, Richard Tucker, Ramin Zabih, Noah Snavely

We introduce a way to learn to estimate a scene representation from a single image by predicting a low-dimensional subspace of optical flow for each training example, which encompasses the variety of possible camera and object movement.

Depth Estimation Depth Prediction +3

Pyramid Adversarial Training Improves ViT Performance

1 code implementation CVPR 2022 Charles Herrmann, Kyle Sargent, Lu Jiang, Ramin Zabih, Huiwen Chang, Ce Liu, Dilip Krishnan, Deqing Sun

In this work, we present pyramid adversarial training (PyramidAT), a simple and effective technique to improve ViT's overall performance.

Ranked #9 on Domain Generalization on ImageNet-C (using extra training data)

Adversarial Attack Data Augmentation +2

OCONet: Image Extrapolation by Object Completion

no code implementations CVPR 2021 Richard Strong Bowen, Huiwen Chang, Charles Herrmann, Piotr Teterwak, Ce Liu, Ramin Zabih

Existing methods struggle to extrapolate images with salient objects in the foreground or are limited to very specific objects such as humans, but tend to work well on indoor/outdoor scenes.

Object

AutoFlow: Learning a Better Training Set for Optical Flow

1 code implementation CVPR 2021 Deqing Sun, Daniel Vlasic, Charles Herrmann, Varun Jampani, Michael Krainin, Huiwen Chang, Ramin Zabih, William T. Freeman, Ce Liu

Synthetic datasets play a critical role in pre-training CNN models for optical flow, but they are painstaking to generate and hard to adapt to new applications.

Optical Flow Estimation

Object-centered image stitching

no code implementations ECCV 2018 Charles Herrmann, Chen Wang, Richard Strong Bowen, Emil Keyder, Ramin Zabih

Image stitching is typically decomposed into three phases: registration, which aligns the source images with a common target image; seam finding, which determines for each target pixel the source image it should come from; and blending, which smooths transitions over the seams.

Image Stitching Object +2

Robust image stitching with multiple registrations

no code implementations ECCV 2018 Charles Herrmann, Chen Wang, Richard Strong Bowen, Emil Keyder, Michael Krainin, Ce Liu, Ramin Zabih

Here, we observe that the use of a single registration often leads to errors, especially in scenes with significant depth variation or object motion.

Image Stitching

Learning to Autofocus

no code implementations CVPR 2020 Charles Herrmann, Richard Strong Bowen, Neal Wadhwa, Rahul Garg, Qiurui He, Jonathan T. Barron, Ramin Zabih

Autofocus is an important task for digital cameras, yet current approaches often exhibit poor performance.

Depth Estimation

Channel selection using Gumbel Softmax

1 code implementation ECCV 2020 Charles Herrmann, Richard Strong Bowen, Ramin Zabih

Important applications such as mobile computing require reducing the computational costs of neural network inference.

Classification General Classification

A discriminative view of MRF pre-processing algorithms

no code implementations ICCV 2017 Chen Wang, Charles Herrmann, Ramin Zabih

While Markov Random Fields (MRFs) are widely used in computer vision, they present a quite challenging inference problem.

Relaxation-Based Preprocessing Techniques for Markov Random Field Inference

no code implementations CVPR 2016 Chen Wang, Ramin Zabih

Markov Random Fields (MRFs) are a widely used graphical model, but the inference problem is NP-hard.

Some medical applications of example-based super-resolution

no code implementations17 Apr 2016 Ramin Zabih

Example-based super-resolution (EBSR) reconstructs a high-resolution image from a low-resolution image, given a training set of high-resolution images.

Super-Resolution

A Primal-Dual Algorithm for Higher-Order Multilabel Markov Random Fields

no code implementations CVPR 2014 Alexander Fix, Chen Wang, Ramin Zabih

Graph cuts method such as a-expansion [4] and fusion moves [22] have been successful at solving many optimization problems in computer vision.

Denoising

Structured learning of sum-of-submodular higher order energy functions

no code implementations28 Sep 2013 Alexander Fix, Thorsten Joachims, Sam Park, Ramin Zabih

Rather than trying to formulate existing higher order priors as an SoS function, we take a discriminative learning approach, effectively searching the space of SoS functions for a higher order prior that performs well on our training set.

Interactive Segmentation

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