Automation of Indian Postal Documents written in Bangla and English

Szilárd Vajda (1) , Kaushik Roy (2, 3) , Umapada Pal (3) , Bidyut B Chaudhuri (3) , Abdel Belaïd (1)

1 READ - READ
2 Dept. of ECE
3 CVPR - Computer Vision and Pattern Recognition Unit

In this paper, we present a system towards Indian postal automation based on pin-code and city name recognition. Here, at first, using Run Length Smoothing Approach (RLSA), non-text blocks (postal stamp, postal seal, etc.) are detected and using positional information Destination Address Block (DAB) is identified from postal documents. Next, lines and words of the DAB are segmented. In India, the address part of a postal document may be written by combination of two scripts: Latin (English) and a local (State/region) script. It is very difficult to identify the script by which pin-code part is written. To overcome this problem on pin-code part, we have used two-stage artificial neural network based general scheme to recognize pin-code numbers written in any of the two scripts. To identify the script by which a word/city name is written, we propose a water reservoir concept based feature. For recognition of city names, we propose an NSHP-HMM (Non- Symmetric Half Plane-Hidden Markov Model) based technique. At present, the accuracy of the proposed digit numeral recognition module is 93.14% while that of city name recognition scheme is 86.44%.

Domaines: Traitement du texte et du document

Szilárd Vajda, Kaushik Roy, Umapada Pal, Bidyut B Chaudhuri, Abdel Belaïd. Automation of Indian Postal Documents written in Bangla and English. International Journal of Pattern Recognition and Artificial Intelligence, 2009, 23 (8), pp.1599-1632. ⟨10.1142/S0218001409007776⟩. ⟨inria-00435501⟩