Search Results for author: Pradeep Sen

Found 19 papers, 12 papers with code

TiNO-Edit: Timestep and Noise Optimization for Robust Diffusion-Based Image Editing

1 code implementation17 Apr 2024 Sherry X. Chen, Yaron Vaxman, Elad Ben Baruch, David Asulin, Aviad Moreshet, Kuo-Chin Lien, Misha Sra, Pradeep Sen

Previous approaches have focused on either fine-tuning pre-trained T2I models on specific datasets to generate certain kinds of images (e. g., with a specific object or person), or on optimizing the weights, text prompts, and/or learning features for each input image in an attempt to coax the image generator to produce the desired result.

Deep Appearance Prefiltering

no code implementations8 Nov 2022 Steve Bako, Pradeep Sen, Anton Kaplanyan

The goal of an ideal level of detail (LoD) method is to make rendering costs independent of the 3D scene complexity, while preserving the appearance of the scene.

Interactive Segmentation and Visualization for Tiny Objects in Multi-megapixel Images

1 code implementation CVPR 2022 Chengyuan Xu, Boning Dong, Noah Stier, Curtis McCully, D. Andrew Howell, Pradeep Sen, Tobias Höllerer

We introduce an interactive image segmentation and visualization framework for identifying, inspecting, and editing tiny objects (just a few pixels wide) in large multi-megapixel high-dynamic-range (HDR) images.

Image Segmentation Interactive Segmentation +2

3DVNet: Multi-View Depth Prediction and Volumetric Refinement

1 code implementation1 Dec 2021 Alexander Rich, Noah Stier, Pradeep Sen, Tobias Höllerer

Furthermore, unlike existing volumetric MVS techniques, our 3D CNN operates on a feature-augmented point cloud, allowing for effective aggregation of multi-view information and flexible iterative refinement of depth maps.

3D Action Recognition 3D Reconstruction +2

VoRTX: Volumetric 3D Reconstruction With Transformers for Voxelwise View Selection and Fusion

1 code implementation1 Dec 2021 Noah Stier, Alexander Rich, Pradeep Sen, Tobias Höllerer

To this end, we introduce VoRTX, an end-to-end volumetric 3D reconstruction network using transformers for wide-baseline, multi-view feature fusion.

3D Reconstruction

Sparse Fusion for Multimodal Transformers

no code implementations23 Nov 2021 Yi Ding, Alex Rich, Mason Wang, Noah Stier, Matthew Turk, Pradeep Sen, Tobias Höllerer

Multimodal classification is a core task in human-centric machine learning.

Cosmic-CoNN: A Cosmic Ray Detection Deep-Learning Framework, Dataset, and Toolkit

2 code implementations28 Jun 2021 Chengyuan Xu, Curtis McCully, Boning Dong, D. Andrew Howell, Pradeep Sen

2) We propose a novel loss function and a neural network optimized for telescope imaging data to train generic CR detection models.

Noise-Aware Video Saliency Prediction

1 code implementation16 Apr 2021 Ekta Prashnani, Orazio Gallo, Joohwan Kim, Josef Spjut, Pradeep Sen, Iuri Frosio

We note that the accuracy of the maps reconstructed from the gaze data of a fixed number of observers varies with the frame, as it depends on the content of the scene.

Saliency Prediction Video Saliency Prediction

Binary TTC: A Temporal Geofence for Autonomous Navigation

1 code implementation CVPR 2021 Abhishek Badki, Orazio Gallo, Jan Kautz, Pradeep Sen

Time-to-contact (TTC), the time for an object to collide with the observer's plane, is a powerful tool for path planning: it is potentially more informative than the depth, velocity, and acceleration of objects in the scene -- even for humans.

Autonomous Navigation Quantization

Bi3D: Stereo Depth Estimation via Binary Classifications

1 code implementation CVPR 2020 Abhishek Badki, Alejandro Troccoli, Kihwan Kim, Jan Kautz, Pradeep Sen, Orazio Gallo

Given a strict time budget, Bi3D can detect objects closer than a given distance in as little as a few milliseconds, or estimate depth with arbitrarily coarse quantization, with complexity linear with the number of quantization levels.

Autonomous Navigation Quantization +1

Meshlet Priors for 3D Mesh Reconstruction

1 code implementation CVPR 2020 Abhishek Badki, Orazio Gallo, Jan Kautz, Pradeep Sen

Meshlets act as a dictionary of local features and thus allow to use learned priors to reconstruct object meshes in any pose and from unseen classes, even when the noise is large and the samples sparse.

Object

PieAPP: Perceptual Image-Error Assessment through Pairwise Preference

1 code implementation CVPR 2018 Ekta Prashnani, Hong Cai, Yasamin Mostofi, Pradeep Sen

Our key observation is that our trained network can then be used separately with only one distorted image and a reference to predict its perceptual error, without ever being trained on explicit human perceptual-error labels.

Video Quality Assessment

Patch-Based Image Hallucination for Super Resolution with Detail Reconstruction from Similar Sample Images

no code implementations3 Jun 2018 Chieh-Chi Kao, Yu-Xiang Wang, Jonathan Waltman, Pradeep Sen

Image hallucination and super-resolution have been studied for decades, and many approaches have been proposed to upsample low-resolution images using information from the images themselves, multiple example images, or large image databases.

Hallucination Super-Resolution

Improving the Resolution of CNN Feature Maps Efficiently with Multisampling

2 code implementations28 May 2018 Shayan Sadigh, Pradeep Sen

We describe a new class of subsampling techniques for CNNs, termed multisampling, that significantly increases the amount of information kept by feature maps through subsampling layers.

General Classification Image Classification

Localization-Aware Active Learning for Object Detection

no code implementations16 Jan 2018 Chieh-Chi Kao, Teng-Yok Lee, Pradeep Sen, Ming-Yu Liu

Active learning - a class of algorithms that iteratively searches for the most informative samples to include in a training dataset - has been shown to be effective at annotating data for image classification.

Active Learning Classification +7

GraphMatch: Efficient Large-Scale Graph Construction for Structure from Motion

no code implementations4 Oct 2017 Qiaodong Cui, Victor Fragoso, Chris Sweeney, Pradeep Sen

We present GraphMatch, an approximate yet efficient method for building the matching graph for large-scale structure-from-motion (SfM) pipelines.

graph construction

ANSAC: Adaptive Non-minimal Sample and Consensus

no code implementations27 Sep 2017 Victor Fragoso, Chris Sweeney, Pradeep Sen, Matthew Turk

While RANSAC-based methods are robust to incorrect image correspondences (outliers), their hypothesis generators are not robust to correct image correspondences (inliers) with positional error (noise).

Kernel-predicting convolutional networks for denoising monte carlo renderings.

no code implementations ACM Transactions on Graphics 2017 Steve Bako, Thijs Vogels, Brian McWilliams, Mark Meyer, Jan Novák, Alex Harvill, Pradeep Sen, Tony Derose, Fabrice Rousselle

In a second approach, we introduce a novel, kernel-prediction network which uses the CNN to estimate the local weighting kernels used to compute each denoised pixel from its neighbors.

Denoising

Removing Shadows from Images of Documents

2 code implementations ACCV 2017 Steve Bako, Soheil Darabi, Eli Shechtman, Jue Wang, Kalyan Sunkavalli, Pradeep Sen

In this work, we automatically detect and remove distracting shadows from photographs of documents and other text-based items.

Document Shadow Removal

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