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Victor R. Martinez

dblp:149/7410 · DBLP profile ↗
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11ranked-venue papers
4as first author
1since 2021 · last 2021
—ORCID · none

Domains — the database's venue-derived domains; a paper can count in several

Artificial intelligence and machine learning · 6 · 3 first-authorGraphics, computer vision, multimedia, augmented reality and games · 5 · 2 first-authorHuman-computer interaction and ubiquitous computing · 2 · 1 first-authorApplied, interdisciplinary, general and emerging computing · 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.

Computer graphics and multimedia
3 papers
Multimedia analysis and retrieval · 59% Multimedia systems and quality of experience · 20% Image and video coding · 20%
Artificial intelligence
4 papers
Information extraction and text analysis · 100%
Interdisciplinary, comprehensive, and emerging computing
2 papers
Computational social science and digital humanities · 100%

Topics — the 5 heaviest of 11, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Multimedia analysis and retrieval › multimedia analysis
human-centric multimedia analysis
0.512021
Computational Media Intelligence: Human-Centered Machine Analysis of Media · Proc. IEEE 2021
Multimedia analysis and retrieval
multimodal signal processing
0.512021
Computational Media Intelligence: Human-Centered Machine Analysis of Media · Proc. IEEE 2021
Image and video coding › image quality assessment
image aesthetics assessment
0.412020
ATQAM/MAST'20: Joint Workshop on Aesthetic and Technical Quality Assessment of Multimedia and Media Analytics for Societal Trends · ACM Multimedia 2020
Multimedia systems and quality of experience
multimedia quality assessment
0.412020
ATQAM/MAST'20: Joint Workshop on Aesthetic and Technical Quality Assessment of Multimedia and Media Analytics for Societal Trends · ACM Multimedia 2020
Natural language and speech › Information extraction and text analysis
sentiment analysis
0.112019
Violence Rating Prediction from Movie Scripts · AAAI 2019

Methods — techniques the papers use, named apart from their topics

deep learning · 1.9natural language processing · 1.5sentiment analysis · 0.9semantic representation · 0.9multi-task learning · 0.9linguistic analysis · 0.6feature engineering · 0.4deep learning sequence classifiers · 0.4
YearPublicationVenuePosition
2021 Computational Media Intelligence: Human-Centered Machine Analysis of Media
abstract
Media is created by humans for humans to tell stories. There exists a natural and imminent need for creating human-centered media analytics to illuminate the stories being told and to understand their impact on individuals and society at large. An objective understanding of media content has numerous applications for different stakeholders, from creators to decision-/policy-makers to consumers. Advances in multimodal signal processing and machine learning (ML) can enable detailed and nuanced characterization of media content (of who, what, how, where, and why) at scale. They can also aid our understanding of the impact of media on a range of issues, including individual experiences, behavioral, cultural, and societal trends, and commercial outcomes. Modern deep learning models combined with audiovisual signal processing can analyze entertainment media, such as Film & TV content to quantify gender, age, and race representations. This creates awareness in an objective way that was hitherto impossible. On the other hand, text mining and natural language processing allow nuanced understanding of language use and spoken interactions in media, such as News to track patterns and trends across different contexts. Moreover, advances in human sensing have enabled us to directly measure the influence of media on an individual’s physiology (and brain), while social media analysis enables tracking the societal impact of media content on different cross sections of the society. This article reviews representative methodologies and algorithms, tools, and systems advancing human-centered media understanding through ML in the pursuit of developing computational media intelligence.
Krishna Somandepalli, Tanaya Guha, Victor R. Martinez, Naveen Kumar 0004, Hartwig Adam, Shri Narayanan
Proc. IEEE3
2020 Joint Estimation and Analysis of Risk Behavior Ratings in Movie Scripts
abstract
Exposure to violent, sexual, or substanceabuse content in media increases the willingness of children and adolescents to imitate similar behaviors.Computational methods that identify portrayals of risk behaviors from audio-visual cues are limited in their applicability to films in post-production, where modifications might be prohibitively expensive.To address this limitation, we propose a model that estimates content ratings based on the language use in movie scripts, making our solution available at the earlier stages of creative production.Our model significantly improves the state-of-the-art by adapting novel techniques to learn better movie representations from the semantic and sentiment aspects of a character's language use, and by leveraging the co-occurrence of risk behaviors, following a multi-task approach.Additionally, we show how this approach can be useful to learn novel insights on the joint portrayal of these behaviors, and on the subtleties that filmmakers may otherwise not pick up on.
Victor R. Martinez, Krishna Somandepalli, Yalda T. Uhls, Shri Narayanan
EMNLP (1)1
2020 ATQAM/MAST'20: Joint Workshop on Aesthetic and Technical Quality Assessment of Multimedia and Media Analytics for Societal Trends
abstract
The Joint Workshop on Aesthetic and Technical Quality Assessment of Multimedia and Media Analytics for Societal Trends (ATQAM/ MAST) aims to bring together researchers and professionals working in fields ranging from computer vision, multimedia computing, multimodal signal processing to psychology and social sciences. It is divided into two tracks: ATQAM and MAST. ATQAM track: Visual quality assessment techniques can be divided into image and video technical quality assessment (IQA and VQA, or broadly TQA) and aesthetics quality assessment (AQA). While TQA is a long-standing field, having its roots in media compression, AQA is relatively young. Both have received increased attention with developments in deep learning. The topics have mostly been studied separately, even though they deal with similar aspects of the underlying subjective experience of media. The aim is to bring together individuals in the two fields of TQA and AQA for the sharing of ideas and discussions on current trends, developments, issues, and future directions. MAST track: The research area of media content analytics has been traditionally used to refer to applications involving inference of higher-level semantics from multimedia content. However, multimedia is typically created for human consumption, and we believe it is necessary to adopt a human-centered approach to this analysis, which would not only enable a better understanding of how viewers engage with content but also how they impact each other in the process.
Tanaya Guha, Vlad Hosu, Dietmar Saupe, Bastian Goldlücke, Naveen Kumar 0004, Weisi Lin, Victor R. Martinez, Krishna Somandepalli, Shri Narayanan, Wen-Huang Cheng, Kree Cole-McLaughlin, Hartwig Adam, John See, Lai-Kuan Wong
ACM Multimedia7
2019 Violence Rating Prediction from Movie Scripts
abstract
Violent content in movies can influence viewers’ perception of the society. For example, frequent depictions of certain demographics as perpetrators or victims of abuse can shape stereotyped attitudes. In this work, we propose to characterize aspects of violent content in movies solely from the language used in the scripts. This makes our method applicable to a movie in the earlier stages of content creation even before it is produced. This is complementary to previous works which rely on audio or video post production. Our approach is based on a broad range of features designed to capture lexical, semantic, sentiment and abusive language characteristics. We use these features to learn a vector representation for (1) complete movie, and (2) for an act in the movie. The former representation is used to train a movie-level classification model, and the latter, to train deep-learning sequence classifiers that make use of context. We tested our models on a dataset of 732 Hollywood scripts annotated by experts for violent content. Our performance evaluation suggests that linguistic features are a good indicator for violent content. Furthermore, our ablation studies show that semantic and sentiment features are the most important predictors of violence in this data. To date, we are the first to show the language used in movie scripts is a strong indicator of violent content. This offers novel computational tools to assist in creating awareness of storytelling.
Victor R. Martinez, Krishna Somandepalli, Karan Singla, Anil Ramakrishna, Yalda T. Uhls, Shri Narayanan
AAAI1
2019 A system for the 2019 Sentiment, Emotion and Cognitive State Task of DARPA's LORELEI project
abstract
During the course of a Humanitarian Assistance-Disaster Relief (HADR) crisis, that can happen anywhere in the world, real-time information is often posted online by the people in need of help which, in turn, can be used by different stakeholders involved with management of the crisis. Automated processing of such posts can considerably improve the effectiveness of such efforts by, for example, understanding the aggregated emotion from affected populations in specific areas, which may help inform decision-makers on how to best allocate resources for an effective disaster response. However, these efforts may be severely limited by the availability of resources for a particular local language. The ongoing DARPA project Low Resource Languages for Emergent Incidents (LORELEI) aims to further language processing technologies for low resource languages in the context of such a humanitarian crisis. In this work, we describe our submission for the 2019 Sentiment, Emotion and Cognitive state (SEC) pilot task of the LORELEI project. We describe a collection of sentiment analysis systems included in our submission along with the features extracted. Our fielded systems obtained the best results in both English and Spanish language evaluations of the SEC pilot task.
Victor R. Martinez, Anil Ramakrishna, Ming-Chang Chiu, Karan Singla, Shri Narayanan
ACII1
2019 Identifying Therapist and Client Personae for Therapeutic Alliance Estimation
abstract
. We measure the strength of the relation between personae and alliance in two experiments. Our results show that (1) alliance can be explained by the interactions between the discovered character types, and (2) models trained on therapist and client personae achieve significant performance gains compared to competitive supervised baselines. Finally, exploratory analysis reveals important character traits that lead to an improved perception of alliance.
Victor R. Martinez, Nikolaos Flemotomos, Victor Ardulov, Krishna Somandepalli, Simon B. Goldberg, Zac E. Imel, David C. Atkins, Shri Narayanan
INTERSPEECH1
2018 Pykaldi: A Python Wrapper for Kaldi
abstract
We present PyKaldi, a free and open-source Python wrapper for the widely-used Kaldi speech recognition toolkit. PyKaldi is more than a collection of Python bindings into Kaldi libraries. It is an extensible scripting layer that allows users to work with Kaldi and OpenFst types interactively in Python. It tightly integrates Kaldi vector and matrix types with NumPy arrays. We believe Py Kaldi will significantly improve the user experience and simplify the integration of Kaldi into Python workflows. PyKaldi comes with extensive documentation and tests. It is released under the Apache License v2.0 with support for both Python 2.7 and 3.5+.
Dogan Can, Victor R. Martinez, Pavlos Papadopoulos, Shri Narayanan
ICASSP2
2018 Multimodal Representation of Advertisements Using Segment-level Autoencoders
abstract
Automatic analysis of advertisements (ads) poses an interesting problem for learning multimodal representations. A promising direction of research is the development of deep neural network autoencoders to obtain inter-modal and intra-modal representations. In this work, we propose a system to obtain segment-level unimodal and joint representations. These features are concatenated, and then averaged across the duration of an ad to obtain a single multimodal representation. The autoencoders are trained using segments generated by time-aligning frames between the audio and video modalities with forward and backward context. In order to assess the multimodal representations, we consider the tasks of classifying an ad as funny or exciting in a publicly available dataset of 2,720 ads. For this purpose we train the segment-level autoencoders on a larger, unlabeled dataset of 9,740 ads, agnostic of the test set. Our experiments show that: 1) the multimodal representations outperform joint and unimodal representations, 2) the different representations we learn are complementary to each other, and 3) the segment-level multimodal representations perform better than classical autoencoders and cross-modal representations -- within the context of the two classification tasks. We obtain an improvement of about 5% in classification accuracy compared to a competitive baseline.
Krishna Somandepalli, Victor R. Martinez, Naveen Kumar 0004, Shri Narayanan
ICMI2
2018 Language Features for Automated Evaluation of Cognitive Behavior Psychotherapy Sessions
Nikolaos Flemotomos, Victor R. Martinez, James Gibson, David C. Atkins, Torrey A. Creed, Shri Narayanan
INTERSPEECH2
2018 The ELISA Situation Frame extraction for low resource languages pipeline for LoReHLT'2016
Nikos Malandrakis, Anil Ramakrishna, Victor R. Martinez, Tanner Sorensen, Dogan Can, Shri Narayanan
Mach. Transl.3
2017 Linguistic analysis of differences in portrayal of movie characters
abstract
Anil Ramakrishna, Victor R. Martínez, Nikolaos Malandrakis, Karan Singla, Shrikanth Narayanan. Proceedings of the 55th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers). 2017.
Anil Ramakrishna, Victor R. Martinez, Nikos Malandrakis, Karan Singla, Shri Narayanan
ACL (1)2