Georgii Mikriukov

AI Researcher · PhD (Dr.-Ing.)
Berlin, Germany

Georgii Mikriukov

About Me

I work on verification and safety assurance of deep neural networks, from concept-based interpretability of vision models to adversarial robustness of multimodal and generative systems. My primary application domain is autonomous driving: perception pipelines, object detection and segmentation, end-to-end architectures, and safety validation of production models.

Core methods: explainable AI (XAI), adversarial robustness and attack detection, and uncertainty quantification, aligned with EU AI Act and NIST AI RMF requirements. Current work extends these to vision-language models and LLM-based agents, including internal-representation probing for early detection of adversarial inputs and hallucinations.

Open Source Projects

Local Concept Embeddings
Uncertainty Gating for Cost-Aware XAI
Deep Unsupervised Contrastive Hashing
Cross-Modal Hashing with Noise Robustness
Concept-Based Adversarial Attack Analysis

Local Concept Embeddings

LoCEs (Local Concept Embeddings) provide a way to analyze how DNNs represent object concepts in complex, real-world scenes. Unlike traditional global approaches, LoCEs generate sample-specific embeddings that capture both the target object and its surrounding context within a single, compact representation.

This context-aware analysis helps uncover how models encode, separate, and confuse visual concepts across diverse scenarios.

Use cases include:

  • Concept Understanding – Examine how models distinguish objects and their contexts.
  • Sub-Concept Discovery – Identify unlabeled variations within categories (e.g., near vs. distant car).
  • Concept Confusion Detection – Detect overlaps in representations of similar categories (e.g., bus vs. truck).
  • Outlier Detection – Find unusual or challenging examples in the data.
  • Information Retrieval – Search for samples using LoCE-based similarity.
  • Model Comparison – Compare internal feature spaces across architectures or training methods.
LoCEs Example
LoCE optimization and generalization.
LoCEs Concept Separation
Concept confusion across models revealed by LoCEs.

Uncertainty Gating for Cost-Aware XAI

A framework for studying how epistemic uncertainty relates to XAI reliability in tabular and image settings. Epistemic uncertainty, obtained from a model's native estimator or a lightweight surrogate, is used to route samples: routing between low- and high-cost explanation methods based on expected reliability, or deferring high-uncertainty samples to save computation.

Across four tabular datasets, five architectures, and four XAI methods, epistemic uncertainty shows a strong negative correlation with explanation stability and faithfulness, a finding that also generalizes to image classification.

Epistemic Gating Framework
Epistemic gating framework for cost-aware XAI.

Deep Unsupervised Contrastive Hashing

DUCH is an unsupervised cross-modal retrieval method for efficient search and retrieval of semantically related images and text in large-scale datasets, using contrastive objectives and adversarial alignment without labeled data.

DUCH Architecture
DUCH Architecture.

Cross-Modal Hashing with Noise Robustness

CHNR extends DUCH with a noise detection module that mitigates the impact of incorrectly paired image-text correspondences in training data.

CHNR Architecture
CHNR Architecture.

Concept-Based Adversarial Attack Analysis

Investigates how adversarial attacks manipulate DNNs at the concept level. Adversarial perturbations are shown to be linearly decomposable into a small set of shared latent vectors, with attack components exploiting target-specific directions.

Concept changes under adversarial attacks
Concept distortions under adversarial attacks.
Similarity of directions of concepts discovered in adversarial attacks targeting taxi class.
Similarity of directions of concepts discovered in adversarial attacks targeting 'taxi' class.

Publications

Selected Publications

Local Concept Embeddings for Analysis of Concept Distributions in Vision DNN Feature Spaces

International Journal of Computer Vision (IJCV), 2025. DOI: 10.1007/s11263-025-02446-y

Georgii Mikriukov, Gesina Schwalbe, Korinna Bade.

Evaluating the Stability of Semantic Concept Representations in CNNs for Robust Explainability

World Conference on Explainable Artificial Intelligence (xAI 2023). DOI: 10.1007/978-3-031-44067-0_26

Georgii Mikriukov, Gesina Schwalbe, Christian Hellert, Korinna Bade.

Best Industry Paper Award, xAI 2023

Unsupervised Contrastive Hashing for Cross-Modal Retrieval in Remote Sensing

IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2022). DOI: 10.1109/ICASSP43922.2022.9746251

Georgii Mikriukov, Mahdyar Ravanbakhsh, Begüm Demir.

Explaining, Verifying, and Aligning Semantic Hierarchies in Vision-Language Model Embeddings

International Joint Conference on Artificial Intelligence (IJCAI 2026). DOI: 10.48550/arXiv.2603.26798

Gesina Schwalbe, Mert Keser, Moritz Bayerkuhnlein, Edgar Heinert, Annika Mütze, Marvin Keller, Sparsh Tiwari, Georgii Mikriukov, Diedrich Wolter, Jae Hee Lee, Matthias Rottmann.

Additional Publications

An Unsupervised Cross-Modal Hashing Method Robust to Noisy Training Image-Text Correspondences in Remote Sensing

IEEE International Conference on Image Processing (ICIP 2022). DOI: 10.1109/ICIP46576.2022.9897500

Georgii Mikriukov, Mahdyar Ravanbakhsh, Begüm Demir.

Unveiling the Anatomy of Adversarial Attacks: Concept-Based XAI Dissection of CNNs

World Conference on Explainable Artificial Intelligence (xAI 2024). DOI: 10.1007/978-3-031-63787-2_6

Georgii Mikriukov, Gesina Schwalbe, Franz Motzkus, Korinna Bade.

Revealing Similar Semantics Inside CNNs: An Interpretable Concept-Based Comparison of Feature Spaces

Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML PKDD 2023). DOI: 10.1007/978-3-031-74630-7_1

Georgii Mikriukov, Gesina Schwalbe, Christian Hellert, Korinna Bade.

Concept-Based Explanations in Computer Vision: Where Are We and Where Could We Go?

Explainable Computer Vision Workshop @ ECCV (eXCV 2024). DOI: 10.1007/978-3-031-92648-8_17

Jae Hee Lee, Georgii Mikriukov, Gesina Schwalbe, Stefan Wermter, Diedrich Wolter.

Uncertainty Gating for Cost-Aware Explainable Artificial Intelligence

World Conference on Explainable Artificial Intelligence (xAI 2026), accepted. DOI: 10.48550/arXiv.2603.29915

Georgii Mikriukov, Grégoire Montavon, Marina M.-C. Höhne.

On Background Bias of Post-Hoc Concept Embeddings in Computer Vision DNNs

World Conference on Explainable Artificial Intelligence (xAI 2025). DOI: 10.1007/978-3-032-08330-2_3

Gesina Schwalbe, Georgii Mikriukov, Edgar Heinert, Stavros Gerolymatos, Mert Keser, Alois Knoll, Matthias Rottmann, Annika Mütze.

Locally Testing Model Detections for Semantic Global Concepts

World Conference on Explainable Artificial Intelligence (xAI 2024). DOI: 10.1007/978-3-031-63787-2_8

Franz Motzkus, Georgii Mikriukov, Christian Hellert, Ute Schmid.

Patents and Inventions

Method for Finding the Cause of Detection Failures of an Artificial Neural Network

Continental Automotive Technologies GmbH (EP 4421682 A1), published 2024-08-28

Georgii Mikriukov, Christian Hellert, Erwin Kraft, Gesina Schwalbe.

Method for Checking a Machine Learning-Based Model for an Error

Continental Automotive Technologies GmbH (DE 10 2023 212 859 A1), published 2025-05-22

Georgii Mikriukov, Christian Hellert.

Method for Training a Machine Learning-Based Model and for Adjusting a Sample for Training

Continental Automotive Technologies GmbH (DE 10 2023 212 519 A1), published 2025-07-10

Georgii Mikriukov, Christian Hellert, Gesina Schwalbe.

A Method, Apparatus, and Computer-Readable Medium for Detection and Elimination of Adversarial Attacks

AUMOVIO Germany GmbH (EP 4749532 A1), published 2026-05-27

Georgii Mikriukov, Gesina Schwalbe.

Method for Embedding and Evaluating Visual Concepts within the Latent Feature Space of Object Detectors

Continental Automotive Technologies GmbH (DE 10 2024 200 029 A1), published 2025-07-03

Erwin Kraft, Gesina Schwalbe, Christian Hellert, Georgii Mikriukov.

Additional patent applications filed in 2025–2026 with Continental AG / AUMOVIO in adversarial robustness, model verification, and interpretability; currently under examination.

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