11,947 research outputs found
Attribute-Graph: A Graph based approach to Image Ranking
We propose a novel image representation, termed Attribute-Graph, to rank
images by their semantic similarity to a given query image. An Attribute-Graph
is an undirected fully connected graph, incorporating both local and global
image characteristics. The graph nodes characterise objects as well as the
overall scene context using mid-level semantic attributes, while the edges
capture the object topology. We demonstrate the effectiveness of
Attribute-Graphs by applying them to the problem of image ranking. We benchmark
the performance of our algorithm on the 'rPascal' and 'rImageNet' datasets,
which we have created in order to evaluate the ranking performance on complex
queries containing multiple objects. Our experimental evaluation shows that
modelling images as Attribute-Graphs results in improved ranking performance
over existing techniques.Comment: In IEEE International Conference on Computer Vision (ICCV) 201
Data-free parameter pruning for Deep Neural Networks
Deep Neural nets (NNs) with millions of parameters are at the heart of many
state-of-the-art computer vision systems today. However, recent works have
shown that much smaller models can achieve similar levels of performance. In
this work, we address the problem of pruning parameters in a trained NN model.
Instead of removing individual weights one at a time as done in previous works,
we remove one neuron at a time. We show how similar neurons are redundant, and
propose a systematic way to remove them. Our experiments in pruning the densely
connected layers show that we can remove upto 85\% of the total parameters in
an MNIST-trained network, and about 35\% for AlexNet without significantly
affecting performance. Our method can be applied on top of most networks with a
fully connected layer to give a smaller network.Comment: BMVC 201
Image Denoising via CNNs: An Adversarial Approach
Is it possible to recover an image from its noisy version using convolutional
neural networks? This is an interesting problem as convolutional layers are
generally used as feature detectors for tasks like classification, segmentation
and object detection. We present a new CNN architecture for blind image
denoising which synergically combines three architecture components, a
multi-scale feature extraction layer which helps in reducing the effect of
noise on feature maps, an l_p regularizer which helps in selecting only the
appropriate feature maps for the task of reconstruction, and finally a three
step training approach which leverages adversarial training to give the final
performance boost to the model. The proposed model shows competitive denoising
performance when compared to the state-of-the-art approaches
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