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Image caption generation using Visual Attention Prediction and Contextual Spatial Relation Extraction
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Image caption generation using Visual Attention Prediction and Contextual Spatial Relation Extraction
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Image caption generation using Visual Attention Prediction and Contextual Spatial Relation Extraction
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Journal Article
Image caption generation using Visual Attention Prediction and Contextual Spatial Relation Extraction
2023
Overview
Automatic caption generation with attention mechanisms aims at generating more descriptive captions containing coarser to finer semantic contents in the image. In this work, we use an encoder-decoder framework employing Wavelet transform based Convolutional Neural Network (WCNN) with two level discrete wavelet decomposition for extracting the visual feature maps highlighting the spatial, spectral and semantic details from the image. The Visual Attention Prediction Network (VAPN) computes both channel and spatial attention for obtaining visually attentive features. In addition to these, local features are also taken into account by considering the contextual spatial relationship between the different objects. The probability of the appropriate word prediction is achieved by combining the aforementioned architecture with Long Short Term Memory (LSTM) decoder network. Experiments are conducted on three benchmark datasets—Flickr8K, Flickr30K and MSCOCO datasets and the evaluation results prove the improved performance of the proposed model with CIDEr score of 124.2.
