III. CAMERA BASED DOCUMENT CAPTURIN

III. CAMERA BASED DOCUMENT CAPTURING SYSTEM
The proposed method is mainly composed of two steps, detection and removing of text regions, and estimation of feature points to determine a homography for image warping. The overview of the proposed method is illustrated in Fig.1. In this paper, we assume that the shape of a paper is rectangular, and the colour of it is white. The typical example of this assumption is a printed document with a normal A4 size white paper
As an initial step, a white region in a capture image is detected with a simple threshold method. After converting the input colour image into a grey scale image, the maximum value of it is found. A white region in an image with a document is detected with a fixed threshold value as follows.