Search Results for author: Avinash Kak

Found 8 papers, 3 papers with code

Learning State-Invariant Representations of Objects from Image Collections with State, Pose, and Viewpoint Changes

no code implementations9 Apr 2024 Rohan Sarkar, Avinash Kak

We believe that this dataset will facilitate research in fine-grained object recognition and retrieval of objects that are capable of state changes.

Object Object Recognition +1

Dual Pose-invariant Embeddings: Learning Category and Object-specific Discriminative Representations for Recognition and Retrieval

no code implementations1 Mar 2024 Rohan Sarkar, Avinash Kak

This paper presents an attention-based dual-encoder architecture with specially designed loss functions that optimize the inter- and intra-class distances simultaneously in two different embedding spaces, one for the category embeddings and the other for the object-level embeddings.

Object Object Recognition +1

Incorporating Season and Solar Specificity into Renderings made by a NeRF Architecture using Satellite Images

1 code implementation2 Aug 2023 Michael Gableman, Avinash Kak

As a result of Shadow NeRF and Sat-NeRF, it is possible to take the solar angle into account in a NeRF-based framework for rendering a scene from a novel viewpoint using satellite images for training.

Specificity

A Laplacian Pyramid Based Generative H&E Stain Augmentation Network

1 code implementation23 May 2023 Fangda Li, Zhiqiang Hu, Wen Chen, Avinash Kak

Hematoxylin and Eosin (H&E) staining is a widely used sample preparation procedure for enhancing the saturation of tissue sections and the contrast between nuclei and cytoplasm in histology images for medical diagnostics.

Adaptive Supervised PatchNCE Loss for Learning H&E-to-IHC Stain Translation with Inconsistent Groundtruth Image Pairs

1 code implementation10 Mar 2023 Fangda Li, Zhiqiang Hu, Wen Chen, Avinash Kak

In our experiment, we demonstrate that our proposed method outperforms existing image-to-image translation methods for stain translation to multiple IHC stains.

Contrastive Learning Image-to-Image Translation +2

Homography Estimation with Convolutional Neural Networks Under Conditions of Variance

no code implementations2 Oct 2020 David Niblick, Avinash Kak

About the CNNs trained with noise-corrupted inputs, we show that training a CNN to a specific magnitude of noise leads to a "Goldilocks Zone" with regard to the noise levels where that CNN performs best.

Homography Estimation Simultaneous Localization and Mapping

A Comparative Evaluation of SGM Variants (including a New Variant, tMGM) for Dense Stereo Matching

no code implementations22 Nov 2019 Sonali Patil, Tanmay Prakash, Bharath Comandur, Avinash Kak

Our goal here is threefold: [1] To present a new dense-stereo matching algorithm, tMGM, that by combining the hierarchical logic of tSGM with the support structure of MGM achieves 6-8\% performance improvement over the baseline SGM (these performance numbers are posted under tMGM-16 in the Middlebury Benchmark V3 ); and [2] Through an exhaustive quantitative and qualitative comparative study, to compare how the major variants of the SGM approach to dense stereo matching, including the new tMGM, perform in the presence of: (a) illumination variations and shadows, (b) untextured or weakly textured regions, (c) repetitive patterns in the scene in the presence of large stereo rectification errors.

Stereo Matching

A Splitting-Based Iterative Algorithm for GPU-Accelerated Statistical Dual-Energy X-Ray CT Reconstruction

no code implementations2 May 2019 Fangda Li, Ankit Manerikar, Tanmay Prakash, Avinash Kak

When dealing with material classification in baggage at airports, Dual-Energy Computed Tomography (DECT) allows characterization of any given material with coefficients based on two attenuative effects: Compton scattering and photoelectric absorption.

General Classification Material Classification

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