Sepehr Kazemi Ranjbar

dblp:375/7657 · DBLP profile ↗
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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

TopicWeightPapersLastEvidence papers
Computer vision › Vision and language › vision-language model
contrastive vision-language model
0.912025
Aligning Visual Contrastive learning models via Preference Optimization · ICLR 2025
Machine learning › Trustworthy machine learning
fairness
0.912025
Aligning Visual Contrastive learning models via Preference Optimization · ICLR 2025
Machine learning › Trustworthy machine learning › fairness › bias mitigation
gender bias mitigation
0.912025
Aligning Visual Contrastive learning models via Preference Optimization · ICLR 2025
Natural language and speech › Language models and text generation › alignment
preference alignment
0.912025
Aligning Visual Contrastive learning models via Preference Optimization · ICLR 2025
Machine learning › Trustworthy machine learning
robustness
0.912025
Aligning Visual Contrastive learning models via Preference Optimization · ICLR 2025
Machine learning › Trustworthy machine learning › robustness › adversarial attack
typographic attack
0.912025
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
YearPublicationVenuePosition
2025 Aligning Visual Contrastive learning models via Preference Optimization
abstract
Contrastive 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
ICLR5