scholarly journals Bag-of-Words and Region-Based Feature Representations in Object Categorization: A Comparative Study

2019 ◽  
Vol 14 (2) ◽  
pp. 93-100
Author(s):  
Chih-Fong Tsai
Keyword(s):  
Comparative Study ◽  
Object Categorization ◽  
Bag Of Words ◽  
Feature Representations

scholarly journals Plant species classification using flower images—A comparative study of local feature representations

PLoS ONE ◽  
2017 ◽  
Vol 12 (2) ◽  
pp. e0170629 ◽  
Author(s):  
Marco Seeland ◽  
Michael Rzanny ◽  
Nedal Alaqraa ◽  
Jana Wäldchen ◽  
Patrick Mäder
Keyword(s):  
Comparative Study ◽  
Plant Species ◽  
Local Feature ◽  
Species Classification ◽  
Feature Representations

An Improved Method for Visual Word Generation Based on Kernel Function

2011 ◽  
Vol 130-134 ◽  
pp. 166-169
Author(s):  
Hong Xia Wang ◽  
Ke Jian Yang ◽  
Feng Gao
Keyword(s):  
Kernel Function ◽  
Semantic Information ◽  
Visual Word ◽  
Object Categorization ◽  
Bag Of Words ◽  
Soft Decision ◽  
Improved Method ◽  
Visual Words ◽  
Word Generation ◽  
Sift Keypoints

This paper studies a novel visual word generation method in the Bag-of-words model for object categorization. The conventional Bag-of-words algorithm represents the cluster centers as visual words, which led to the incomplete expressions of image semantic information, so an improved method for visual word generation using the soft-decision based on kernel function is proposed. First, SIFT keypoints of images are extracted. Then, after clustering SIFT keypoints, some typical SIFT keypoints are selected from a cluster by kernel density estimation using a kernel function. Finally, these selected keypoints are trained employing SVM to generate a visual word of this cluster. Experimental results show that the proposed visual word generation method enhances the expressions of image semantic information, increases the recall ratio effectively, and improves significantly the effect of object categorization.

scholarly journals A Comparative Study of Bag-of-Words and Bag-of-Topics Models of EO Image Patches

2015 ◽  
Vol 12 (6) ◽  
pp. 1357-1361 ◽  
Author(s):  
Reza Bahmanyar ◽  
Shiyong Cui ◽  
Mihai Datcu
Keyword(s):  
Comparative Study ◽  
Bag Of Words ◽  
Image Patches

Object Categorization from RGB-D Local Features and Bag of Words

2015 ◽  
pp. 635-644 ◽  
Author(s):  
Jesus Martínez-Gómez ◽  
Miguel Cazorla ◽  
Ismael García-Varea ◽  
Cristina Romero-González
Keyword(s):  
Local Features ◽  
Object Categorization ◽  
Bag Of Words
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