526 research outputs found
FickleNet: Weakly and Semi-supervised Semantic Image Segmentation using Stochastic Inference
The main obstacle to weakly supervised semantic image segmentation is the
difficulty of obtaining pixel-level information from coarse image-level
annotations. Most methods based on image-level annotations use localization
maps obtained from the classifier, but these only focus on the small
discriminative parts of objects and do not capture precise boundaries.
FickleNet explores diverse combinations of locations on feature maps created by
generic deep neural networks. It selects hidden units randomly and then uses
them to obtain activation scores for image classification. FickleNet implicitly
learns the coherence of each location in the feature maps, resulting in a
localization map which identifies both discriminative and other parts of
objects. The ensemble effects are obtained from a single network by selecting
random hidden unit pairs, which means that a variety of localization maps are
generated from a single image. Our approach does not require any additional
training steps and only adds a simple layer to a standard convolutional neural
network; nevertheless it outperforms recent comparable techniques on the Pascal
VOC 2012 benchmark in both weakly and semi-supervised settings.Comment: To appear in CVPR 201
Coevolutionary dynamics on scale-free networks
We investigate Bak-Sneppen coevolution models on scale-free networks with
various degree exponents including random networks. For ,
the critical fitness value approaches to a nonzero finite value in the
limit , whereas approaches to zero as .
These results are explained by showing analytically on the networks with size . The avalanche size distribution
shows the normal power-law behavior for . In contrast,
for has two power-law regimes. One is a short regime for
small with a large exponent and the other is a long regime for
large with a small exponent (). The origin of the
two power-regimes is explained by the dynamics on an artificially-made
star-linked network.Comment: 5 pages, 5 figure
Prominent Attribute Modification using Attribute Dependent Generative Adversarial Network
Modifying the facial images with desired attributes is important, though
challenging tasks in computer vision, where it aims to modify single or
multiple attributes of the face image. Some of the existing methods are either
based on attribute independent approaches where the modification is done in the
latent representation or attribute dependent approaches. The attribute
independent methods are limited in performance as they require the desired
paired data for changing the desired attributes. Secondly, the attribute
independent constraint may result in the loss of information and, hence, fail
in generating the required attributes in the face image. In contrast, the
attribute dependent approaches are effective as these approaches are capable of
modifying the required features along with preserving the information in the
given image. However, attribute dependent approaches are sensitive and require
a careful model design in generating high-quality results. To address this
problem, we propose an attribute dependent face modification approach. The
proposed approach is based on two generators and two discriminators that
utilize the binary as well as the real representation of the attributes and, in
return, generate high-quality attribute modification results. Experiments on
the CelebA dataset show that our method effectively performs the multiple
attribute editing with preserving other facial details intactly
- …