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en:projects:details:neuralsemproject [2011/09/23 14:58]
en:projects:details:neuralsemproject [2013/06/12 13:52]
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 ---- dataentry project ---- ---- dataentry project ----
-title : Simple neural networks with error correcting abilities+title : Implementing Some Feature Extracting Techniques to Model Human Visual System
 contactname:​ Amir Hesam Salavati contactname:​ Amir Hesam Salavati
 contactmail_mail:​ hesam.salavati@epfl.ch contactmail_mail:​ hesam.salavati@epfl.ch
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 contactroom:​ BC 160 contactroom:​ BC 160
 type : master semester type : master semester
-status : available+status : completed
 created_dt : 2010-11-15 created_dt : 2010-11-15
-taken_dt : YYYY-MM-DD +taken_dt : 2013-01-19 
-completed_dt : YYYY-MM-DD +completed_dt : 2013-06-12 
-by : the full name of the student +by : Diego Marcos Gonzalez ​ 
-output_media : en:​projects:​neural_storage_capacity.pdf|Download ​Abstract ​in PDF Format+output_media : en:​projects:​master_semester:​marcos_salavati_semester_project_report_2013.pdf|Download ​Project Report ​in PDF Format
 table : projects table : projects
 ====== ======
 template:​datatemplates:​project template:​datatemplates:​project
 ---- ----
 /* Description of the project */ /* Description of the project */
-===== Background ​===== +===== Project Description ​===== 
-Memorizing patterns and correctly recalling them later is an essential ingredient of neural activity. ​In past 25 yearsa number of neural networks ​ has been invented memorize and recall patterns. Interestingly,​ some of these networks ​are able to recall the correct pattern even if the input pattern contains error and is partially corrupted because of noiseIn this regardthese artificial networks resemble error correcting codesi.e. they are able to recognize the correct pattern in presence ​of noise.+\\ 
 +In computer visionthere are various different techniques ​to extract important features from imagesThese features are then later used in patten recognitionimage classificationetcSome of these techniques ​are comparable ​to some models ​of specific parts in human visual system
-Howeverthe storage capacity of these networks ​are quite small compared to their counterparts ​in coding theory. Given the fact that modern codes use the same basic structure ​to do error correction and the one used by neural networks, i.e. bipartite graph with local message passing, it seems interesting to consider applications ​of modern coding theory ​to increase ​the storage capacity of neural networks by finding the appropriate weights for the neural graph+In this projectwe are interested ​in implementing some of the widely used techniques in feature learning (extraction) and applying them to a dataset ​of natural images. This usually corresponds ​to solving some optimization problem to find the features that represent ​the data more accurately.
-Up to this point, some weighting schemes (including the Hebbian rule) were tested without much success. Considering more weighting schemes, such as the BCM rule, would be the next step toward the goal of increasing the storage capacity which is the main objective of this project+The implementation can be either done in C or MATLAB (MATLAB ​is preferred)
 +And here are some lines to give you an idea about why we are interested in this project: ​
 +Once the feature extraction techniques are implemented,​ the learned features will then be used as inputs to a neural network which mimics some parts of human memory (neural associative memory). The ultimate goal would be to see if one will get better information storage capacities in artificial neural memories when the inputs are natural stimuli (such as images) and pre-processed before being stored. HEre, pre-processing refers to the feature extraction procedure.
 +This project is suitable for students interested in computer vision, neural networks and mathematics who prefer a combination of theoretical and empirical works. ​
-====== Project Goals ====== +The prerequisites ​are: 
-The objectives of this project ​are: +1)Basic knowledge ​of linear algebra.  
-1)To understand the principles ​of neural networks and modern codes+2)Being familiar with suitable programming language (MATLAB is preferredBut C/C++ is acceptable.)
-2)Applying different weighting scheme to neural networks and evaluate the performance for storing codewords of linear code+
-This project ​is suitable for students who prefer doing simulations to find the appropriate framework for doing theoretical analysis+Some knowledge about feature learning models in computer vision ​is not necessary but is deeply encouraged
-The prerequisites are+\\ 
-1)Basic knowledge of coding theory. +\\ 
-2)Being familiar with a suitable programming language (C/​C++,​MATLAB)+\\ 
 +====== Report ====== 
 +The report ​ is available via the following link
 +{{:​en:​projects:​master_semester:​marcos_salavati_semester_project_report_2013.pdf|Implementing Some Feature Extracting Techniques to Model Human Visual System}}