Patent Document ID: 9881209
Application ID: 15087504

Base Claim:
1. A method for detecting tampering in a document image, the method comprising: determining, by an image processing device, an image quality of the document image by analyzing one or more quality features extracted from the document image; pre-processing, by the image processing device, the document image based on a pre-defined ontology of documents when the image quality is above a pre-defined quality threshold; segmenting, by the image processing device, the pre-processed document image into one or more regions of interest based on the pre-defined ontology of documents; assigning, by the image processing device, a pre-defined weightage to a tampering in the one or more regions of interest; determining, by the image processing device, a weighted average of the pre-defined weightage for each tampering in the one or more regions of interest by processing each region of interest; and detecting, by the image processing device, tampering in the document image when a weighted average of the pre-defined weightage for each tampering in the one or more regions of interest is above a pre-defined threshold value.

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Claim 2:
2. The method of claim 1 , wherein pre-processing the document image comprises: extracting one or more image characteristics from the document image; and pre-processing the one or more image characteristics based on the pre-defined ontology of documents, wherein the pre-defined ontology defines a type of pre-processing required on an image characteristic of the one or more image characteristics.