Journal Article


Alan Smeaton
George Awad
Yvette Graham



reproducibility of results deep learning software semantics image processing computer assisted correlation of data humans natural language processing

Evaluation of automatic video captioning using direct assessment. (2017)

Abstract We present Direct Assessment, a method for manually assessing the quality of automatically-generated captions for video. Evaluating the accuracy of video captions is particularly difficult because for any given video clip there is no definitive ground truth or correct answer against which to measure. Metrics for comparing automatic video captions against a manual caption such as BLEU and METEOR, drawn from techniques used in evaluating machine translation, were used in the TRECVid video captioning task in 2016 but these are shown to have weaknesses. The work presented here brings human assessment into the evaluation by crowd sourcing how well a caption describes a video. We automatically degrade the quality of some sample captions which are assessed manually and from this we are able to rate the quality of the human assessors, a factor we take into account in the evaluation. Using data from the TRECVid video-to-text task in 2016, we show how our direct assessment method is replicable and robust and scales to where there are many caption-generation techniques to be evaluated including the TRECVid video-to-text task in 2017.
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Full list of authors on original publication

Alan Smeaton, George Awad, Yvette Graham

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Alan F. Smeaton
Dublin City University
Total Publications: 492
George M. Awad
Dublin City University
Total Publications: 15
Yvette Graham
Dublin City University
Total Publications: 25