handwritten character recognition using block wise segmentation technique (bst) in neural network...
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Handwritten Character Recognition Using Block wise Segmentation
Technique (BST) in Neural Network
47th Annual Convention of the Computer Society of India
International Conference on Intelligent Infrastructure
Science City Kolkata December 1-2, 2012
Presented By: Apash Roy, CSA, University of North Bengal
Introduction
Presented By: Apash Roy, CSA, University of North Bengal
• Broad area of application• Still Now the task is in an ease of Interest
Biological Neuron
Presented By: Apash Roy, CSA, University of North Bengal
Artificial Neural Network
Presented By: Apash Roy, CSA, University of North Bengal
Important properties of an Artificial Neural
Network
• Network topology
• Encoding scheme
• Learning algorithm(Supervised and Unsupervised learning)
Presented By: Apash Roy, CSA, University of North Bengal
Character Recognition
Presented By: Apash Roy, CSA, University of North Bengal
Pre-Processing
Apash Roy, CSA, University of
North Bengal
Hard Copy Image
Scanner / camera / ...
Pre-processing
Vector with Binary value
Pre-Processing . . .
Apash Roy, CSA, University of
North Bengal
0 0 0 0 1 1 1 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 1 1 0 1 1 0 0 0 0 1 1 0 0 0 1 1 0 0 1 1 0 0 0 0 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 1 1
0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 11 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1
0 0 1 0 00 1 0 1 0 1 1 1 1 11 0 0 0 11 0 0 0 1
Binary representation of ‘A’ in three different size.
Perceptron learning
Apash Roy, CSA, University of North Bengal
Perceptron learning
wij(new) = wij(old) + c(di - yi)xi
where,
wij : the connection weight from ith input element xi of X to the jth neuron of the network.
di and yi :the desired and actual output of jth
neuron.
c :the small positive constant representing the learning rate.
Apash Roy, CSA, University of North Bengal
Block wise Segmentation Technique (BST)
Presented By: Apash Roy, CSA, University of North Bengal
Training With BST
Presented By: Apash Roy, CSA, University of North Bengal
Character recognition with BST
Presented By: Apash Roy, CSA, University of North Bengal
Some Results
Presented By: Apash Roy, CSA, University of North Bengal
Characters No. of Variants No of success Percentage
A 5 5 100%
B 5 4 80%
C 5 5 100%
D 5 4 80%
E 5 5 100%
Thank You
Apash RoyDepartment of Computer Science and
ApplicationThe university of North Bengal
Presented By: Apash Roy, CSA, University of North Bengal