Handwritten Words and Digits Recognition using Deep Learning Based Bag of Features Framework Unconstrained handwriting text recognition is a stimulating field in the branch of pattern recognition. This field is still an open search due to the wide variability of human writing. Recent trends show a potential improvement of recognition by adoption a novel representation of extracted features. In the present paper, we propose a novel feature extraction model by learning a Bag of Features Framework for handwritten text recognition based on Deep Sparse AutoEncoder. The Hidden Markov Models are then used for sequences modeling. For features learned quality evaluation, our proposed system was tested on two handwritten text datasets IFNENIT word images benchmark and MNIST handwritten digits. Our method achieves promising recognition on both datasets.

Exploration of CNN Features for Online Handwriting Recognition Recently, convolution neural network (CNN) has demonstrated its powerful ability in learning features particularly from image data. In this work, its capability of feature learning in online handwriting is explored, by constructing various CNN architectures. The developed CNNs can process online handwriting directly unlike the existing works that convert the online handwriting to an image to utilize the architecture. The first convolution layer accepts the sequence of (x; y) coordinates along the trace of the character as an input and outputs a convolved filtered signal. Thereafter, via alternating steps of convolution and Rectified Linear Unit layers, in a hierarchical fashion, we obtain a set of deep features that can be employed for classification. We utilize the proposed CNN features to develop a Support Vector Machine (SVM)based character recognition system and an implicitsegmentation based large vocabulary word recognition system employing hidden Markov model (HMM) framework. To the best of our knowledge, this is the first work of its kind that applies CNN directly on the (x; y) coordinates of the online handwriting data. Experiments are carried out on two publicly available English online handwritten database: UNIPEN character and UNIPEN ICROW03 word databases. The obtained results are promising over the reported works employing the pointbased features.