User profiles for Pietro Perona

Pietro Perona

California Institute of Technology
Verified email at caltech.edu
Cited by 155094

A bayesian hierarchical model for learning natural scene categories

L Fei-Fei, P Perona - … vision and pattern recognition (CVPR'05), 2005 - ieeexplore.ieee.org
We propose a novel approach to learn and recognize natural scene categories. Unlike previous
work, it does not require experts to annotate the training set. We represent the image of …

Scale-space and edge detection using anisotropic diffusion

P Perona, J Malik - IEEE Transactions on pattern analysis and …, 1990 - ieeexplore.ieee.org
A new definition of scale-space is suggested, and a class of algorithms used to realize a
diffusion process is introduced. The diffusion coefficient is chosen to vary spatially in such a way …

[PDF][PDF] Caltech-256 object category dataset

G Griffin, A Holub, P Perona - 2007 - authors.library.caltech.edu
We introduce a challenging set of 256 object categories containing a total of 30607 images.
The original Caltech-101 [1] was collected by choosing a set of object categories, …

Graph-based visual saliency

J Harel, C Koch, P Perona - Advances in neural information …, 2006 - proceedings.neurips.cc
A new bottom-up visual saliency model, Graph-Based Visual Saliency (GBVS), is proposed.
It consists of two steps: rst forming activation maps on certain feature channels, and then …

Microsoft coco: Common objects in context

TY Lin, M Maire, S Belongie, J Hays, P Perona… - Computer Vision–ECCV …, 2014 - Springer
We present a new dataset with the goal of advancing the state-of-the-art in object recognition
by placing the question of object recognition in the context of the broader question of scene …

The caltech-ucsd birds-200-2011 dataset

C Wah, S Branson, P Welinder, P Perona, S Belongie - 2011 - authors.library.caltech.edu
CUB-200-2011 is an extended version of CUB-200 [7], a challenging dataset of 200 bird
species. The extended version roughly doubles the number of images per category and adds …

Pedestrian detection: An evaluation of the state of the art

…, C Wojek, B Schiele, P Perona - IEEE transactions on …, 2011 - ieeexplore.ieee.org
Pedestrian detection is a key problem in computer vision, with several applications that have
the potential to positively impact quality of life. In recent years, the number of approaches to …

Object class recognition by unsupervised scale-invariant learning

R Fergus, P Perona, A Zisserman - 2003 IEEE Computer …, 2003 - ieeexplore.ieee.org
We present a method to learn and recognize object class models from unlabeled and
unsegmented cluttered scenes in a scale invariant manner. Objects are modeled as flexible …

Learning generative visual models from few training examples: An incremental bayesian approach tested on 101 object categories

L Fei-Fei, R Fergus, P Perona - 2004 conference on computer …, 2004 - ieeexplore.ieee.org
Current computational approaches to learning visual object categories require thousands of
training images, are slow, cannot learn in an incremental manner and cannot incorporate …

One-shot learning of object categories

L Fei-Fei, R Fergus, P Perona - IEEE transactions on pattern …, 2006 - ieeexplore.ieee.org
Learning visual models of object categories notoriously requires hundreds or thousands of
training examples. We show that it is possible to learn much information about a category …