56,258 research outputs found

    Robust Image Sentiment Analysis Using Progressively Trained and Domain Transferred Deep Networks

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    Sentiment analysis of online user generated content is important for many social media analytics tasks. Researchers have largely relied on textual sentiment analysis to develop systems to predict political elections, measure economic indicators, and so on. Recently, social media users are increasingly using images and videos to express their opinions and share their experiences. Sentiment analysis of such large scale visual content can help better extract user sentiments toward events or topics, such as those in image tweets, so that prediction of sentiment from visual content is complementary to textual sentiment analysis. Motivated by the needs in leveraging large scale yet noisy training data to solve the extremely challenging problem of image sentiment analysis, we employ Convolutional Neural Networks (CNN). We first design a suitable CNN architecture for image sentiment analysis. We obtain half a million training samples by using a baseline sentiment algorithm to label Flickr images. To make use of such noisy machine labeled data, we employ a progressive strategy to fine-tune the deep network. Furthermore, we improve the performance on Twitter images by inducing domain transfer with a small number of manually labeled Twitter images. We have conducted extensive experiments on manually labeled Twitter images. The results show that the proposed CNN can achieve better performance in image sentiment analysis than competing algorithms.Comment: 9 pages, 5 figures, AAAI 201

    Implementasi Twitter Sentiment Analysis Untuk Review Film Menggunakan Algoritma Support Vector Machine

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    Sentiment analysis digunakan untuk melihat opini terhadap sebuah masalah menuju ke opini positif atau negatif. Media sosial Twitter merupakan salah satu media yang digunakan untuk memberikan opini melalui tweet. Pengguna Twitter akan memberikan opini tentang suatu hal, salah satunya film yang sedang tayang di bioskop. Opini pengguna bermanfaat bagi pengguna lain dan rumah produksi film berkaitan evaluasi film. Klasifikasi opini diperlukan untuk memudahkan pengguna dalam melihat opini positif, negatif, atau netral. Algoritma yang digunakan dalam klasifikasi adalah Support Vector Machine. Dataset berjumlah 1.027 tweet yang didapatkan dari tweet untuk film populer tahun 2016. Hasil klasifikasi opini terbagi menjadi 3, yaitu opini positif, negatif, dan netral. Evaluasi menentukan tingkat akurasi dari algoritma Support Vector Machine. Hasil akurasi klasifikasi algoritma Support Vector Machine menggunakan 60, 70, 80, dan 90 persen data training rata- ratanya adalah 76,06 persen, 76,83 persen, 81,07 persen, dan 83,3 persen. Nilai precision positif memiliki rata- rata sebesar 79,97 persen, 78,71 persen, 84,02 persen, dan 85,54 persen. Nilai precision negatif memiliki rata- rata sebesar 81,73 persen, 87,41 persen, 87,37 persen, dan 93,61 persen. Nilai precision netral memiliki rata- rata sebesar 67,13 persen, 69,47 persen, 74,08 persen, dan 74,14 persen

    Evaluation datasets for Twitter sentiment analysis: a survey and a new dataset, the STS-Gold

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    Sentiment analysis over Twitter offers organisations and individuals a fast and effective way to monitor the publics' feelings towards them and their competitors. To assess the performance of sentiment analysis methods over Twitter a small set of evaluation datasets have been released in the last few years. In this paper we present an overview of eight publicly available and manually annotated evaluation datasets for Twitter sentiment analysis. Based on this review, we show that a common limitation of most of these datasets, when assessing sentiment analysis at target (entity) level, is the lack of distinctive sentiment annotations among the tweets and the entities contained in them. For example, the tweet "I love iPhone, but I hate iPad" can be annotated with a mixed sentiment label, but the entity iPhone within this tweet should be annotated with a positive sentiment label. Aiming to overcome this limitation, and to complement current evaluation datasets, we present STS-Gold, a new evaluation dataset where tweets and targets (entities) are annotated individually and therefore may present different sentiment labels. This paper also provides a comparative study of the various datasets along several dimensions including: total number of tweets, vocabulary size and sparsity. We also investigate the pair-wise correlation among these dimensions as well as their correlations to the sentiment classification performance on different datasets

    The Royal Birth of 2013: Analysing and Visualising Public Sentiment in the UK Using Twitter

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    Analysis of information retrieved from microblogging services such as Twitter can provide valuable insight into public sentiment in a geographic region. This insight can be enriched by visualising information in its geographic context. Two underlying approaches for sentiment analysis are dictionary-based and machine learning. The former is popular for public sentiment analysis, and the latter has found limited use for aggregating public sentiment from Twitter data. The research presented in this paper aims to extend the machine learning approach for aggregating public sentiment. To this end, a framework for analysing and visualising public sentiment from a Twitter corpus is developed. A dictionary-based approach and a machine learning approach are implemented within the framework and compared using one UK case study, namely the royal birth of 2013. The case study validates the feasibility of the framework for analysis and rapid visualisation. One observation is that there is good correlation between the results produced by the popular dictionary-based approach and the machine learning approach when large volumes of tweets are analysed. However, for rapid analysis to be possible faster methods need to be developed using big data techniques and parallel methods.Comment: http://www.blessonv.com/research/publicsentiment/ 9 pages. Submitted to IEEE BigData 2013: Workshop on Big Humanities, October 201

    Analyzing Disproportionate Reaction via Comparative Multilingual Targeted Sentiment in Twitter

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    Global events such as terrorist attacks are commented upon in social media, such as Twitter, in different languages and from different parts of the world. Most prior studies have focused on monolingual sentiment analysis, and therefore excluded an extensive proportion of the Twitter userbase. In this paper, we perform a multilingual comparative sentiment analysis study on the terrorist attack in Paris, during November 2015. In particular, we look at targeted sentiment, investigating opinions on specific entities, not simply the general sentiment of each tweet. Given the potentially inflammatory and polarizing effect that these types of tweets may have on attitudes, we examine the sentiments expressed about different targets and explore whether disproportionate reaction was expressed about such targets across different languages. Specifically, we assess whether the sentiment for French speaking Twitter users during the Paris attack differs from English-speaking ones. We identify disproportionately negative attitudes in the English dataset over the French one towards some entities and, via a crowdsourcing experiment, illustrate that this also extends to forming an annotator bias
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