VLDB 2026 Research / reviewers in the wild / expert
Sepehr Kazemi Ranjbar
dblp:375/7657
· DBLP profile ↗
1ranked-venue papers
0as first author
1since 2021 · last 2025
—ORCID · none
Domains — the database's venue-derived domains; a paper can count in several
Artificial intelligence and machine learning · 1 · 1 since 2021
Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.
| Artificial intelligence
1 paper |
Trustworthy machine learning · 67% Vision and language · 17% Language models and text generation · 17% |
Topics — the 6 heaviest of 6, each with the papers that count most for it
| Topic | Weight | Papers | Last | Evidence papers |
|---|---|---|---|---|
Computer vision › Vision and language › vision-language model
contrastive vision-language model |
0.9 | 1 | 2025 | Aligning Visual Contrastive learning models via Preference Optimization · ICLR 2025 |
Machine learning › Trustworthy machine learning
fairness |
0.9 | 1 | 2025 | Aligning Visual Contrastive learning models via Preference Optimization · ICLR 2025 |
Machine learning › Trustworthy machine learning › fairness › bias mitigation
gender bias mitigation |
0.9 | 1 | 2025 | Aligning Visual Contrastive learning models via Preference Optimization · ICLR 2025 |
Natural language and speech › Language models and text generation › alignment
preference alignment |
0.9 | 1 | 2025 | Aligning Visual Contrastive learning models via Preference Optimization · ICLR 2025 |
Machine learning › Trustworthy machine learning
robustness |
0.9 | 1 | 2025 | Aligning Visual Contrastive learning models via Preference Optimization · ICLR 2025 |
Machine learning › Trustworthy machine learning › robustness › adversarial attack
typographic attack |
0.9 | 1 | 2025 | Aligning Visual Contrastive learning models via Preference Optimization · ICLR 2025 |
Methods — techniques the papers use, named apart from their topics
reinforcement learning from human feedback · 0.9preference optimization · 0.9direct preference optimization · 0.9
| Year | Publication | Venue | Position |
|---|---|---|---|
| 2025 | Aligning Visual Contrastive learning models via Preference OptimizationabstractContrastive learning models have demonstrated impressive abilities to capture semantic similarities by aligning representations in the embedding space. However, their performance can be limited by the quality of the training data and its inherent biases. While Preference Optimization (PO) methods such as Reinforcement Learning from Human Feedback (RLHF) and Direct Preference Optimization (DPO) have been applied to align generative models with human preferences, their use in contrastive learning has yet to be explored. This paper introduces a novel method for training contrastive learning models using different PO methods to break down complex concepts. Our method systematically aligns model behavior with desired preferences, enhancing performance on the targeted task. In particular, we focus on enhancing model robustness against typographic attacks and inductive biases, commonly seen in contrastive vision-language models like CLIP. Our experiments demonstrate that models trained using PO outperform standard contrastive learning techniques while retaining their ability to handle adversarial challenges and maintain accuracy on other downstream tasks. This makes our method well-suited for tasks requiring fairness, robustness, and alignment with specific preferences. We evaluate our method for tackling typographic attacks on images and explore its ability to disentangle gender concepts and mitigate gender bias, showcasing the versatility of our approach. Amirabbas Afzali, Borna Khodabandeh, Ali Rasekh, Mahyar JafariNodeh, Sepehr Kazemi Ranjbar, Simon Gottschalk 0001 |
ICLR | 5 |