Patent Document ID: 20100290701
Application ID: 12752444
Patent Status: 0

Claim One:
1. A system for document image segmentation, said system comprising: input means adapted to input a document image; image pre-processing means adapted to pre-process said document image by maintaining the aspect ratio, said pre-processing means including a colour quantization means to give a pre-processed quantized image; colour space transformation means adapted to receive said pre-processed quantized image and apply a Hue, Saturation and Value colour space transformation on said quantized image to derive a transformed image containing only saturation component of said quantized image; first image energy calculation means adapted to receive said transformed image and calculate both horizontal and vertical energies of said transformed image to provide a first energy image by cumulating both of said calculated energies of said transformed image; grayscale image conversion means adapted to receive said pre-processed quantized image and perform a grayscale conversion operation on said quantized image to provide a gray scale image; second image energy calculation means adapted to receive said gray scale image and calculate both horizontal and vertical energies of said gray scale image to provide a second energy image by cumulating both of said calculated energies and said gray scale image; computational means adapted to receive said first energy image and second energy image to compute a maximum of both the energies and provide a maximum energy image; binarization means adapted to receive said maximum energy image and provide a binarized image; dilation means adapted to receive said binarized image and perform a dilation operation to provide a dilated image; clustering means adapted to receive said dilated image and formulate different clusters based on the density of the dilated areas and provide a clustered image; and box creation means adapted to create bounding boxes enclosing each cluster in the clustered image to form an image of the document having image segments.