Search Results for author: Stefan Carlsson

Found 10 papers, 2 papers with code

Hyperplane Arrangements of Trained ConvNets Are Biased

1 code implementation17 Mar 2020 Matteo Gamba, Stefan Carlsson, Hossein Azizpour, Mårten Björkman

We investigate the geometric properties of the functions learned by trained ConvNets in the preactivation space of their convolutional layers, by performing an empirical study of hyperplane arrangements induced by a convolutional layer.

Geometry of Deep Convolutional Networks

no code implementations21 May 2019 Stefan Carlsson

We give a formal procedure for computing preimages of convolutional network outputs using the dual basis defined from the set of hyperplanes associated with the layers of the network.

General Classification

Spotlight the Negatives: A Generalized Discriminative Latent Model

no code implementations8 Jul 2015 Hossein Azizpour, Mostafa Arefiyan, Sobhan Naderi Parizi, Stefan Carlsson

Discriminative latent variable models (LVM) are frequently applied to various visual recognition tasks.

Visual Instance Retrieval with Deep Convolutional Networks

no code implementations20 Dec 2014 Ali Sharif Razavian, Josephine Sullivan, Stefan Carlsson, Atsuto Maki

This paper provides an extensive study on the availability of image representations based on convolutional networks (ConvNets) for the task of visual instance retrieval.

Image Retrieval Retrieval

Persistent Evidence of Local Image Properties in Generic ConvNets

no code implementations24 Nov 2014 Ali Sharif Razavian, Hossein Azizpour, Atsuto Maki, Josephine Sullivan, Carl Henrik Ek, Stefan Carlsson

Supervised training of a convolutional network for object classification should make explicit any information related to the class of objects and disregard any auxiliary information associated with the capture of the image or the variation within the object class.

General Classification Object

Factors of Transferability for a Generic ConvNet Representation

no code implementations22 Jun 2014 Hossein Azizpour, Ali Sharif Razavian, Josephine Sullivan, Atsuto Maki, Stefan Carlsson

In the common scenario, a ConvNet is trained on a large labeled dataset (source) and the feed-forward units activation of the trained network, at a certain layer of the network, is used as a generic representation of an input image for a task with relatively smaller training set (target).

Dimensionality Reduction Representation Learning

Large Scale, Large Margin Classification using Indefinite Similarity Measures

no code implementations27 May 2014 Omid Aghazadeh, Stefan Carlsson

Despite the success of the popular kernelized support vector machines, they have two major limitations: they are restricted to Positive Semi-Definite (PSD) kernels, and their training complexity scales at least quadratically with the size of the data.

Classification General Classification

Self-tuned Visual Subclass Learning with Shared Samples An Incremental Approach

no code implementations22 May 2014 Hossein Azizpour, Stefan Carlsson

Finally, we show that state of the art object detection methods (e. g. DPM) are unable to use the tails of this distribution comprising 50\% of the training samples.

Clustering General Classification +2

CNN Features off-the-shelf: an Astounding Baseline for Recognition

4 code implementations23 Mar 2014 Ali Sharif Razavian, Hossein Azizpour, Josephine Sullivan, Stefan Carlsson

We report on a series of experiments conducted for different recognition tasks using the publicly available code and model of the \overfeat network which was trained to perform object classification on ILSVRC13.

Attribute General Classification +4

3D Pictorial Structures for Multiple View Articulated Pose Estimation

no code implementations CVPR 2013 Magnus Burenius, Josephine Sullivan, Stefan Carlsson

We consider the problem of automatically estimating the 3D pose of humans from images, taken from multiple calibrated views.

2D Pose Estimation Pose Estimation

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