Patent ID: 7039253
Filing Date: 2006-05-02
Classification: G06F

Abstract:
1. An image display device comprising: an image pickup section which picks up a spot and an area including said spot from an arbitrary position; a generation section which generates image data of said area picked up by said image pickup section; a display section which displays an image based on said image data generated by said generation section; a processing section which processes said image data in such a way that said image data is adequately displayed on a display screen of said display section; a measuring section which measures positional coordinates of said spot in said area; and a coordinate conversion section which converts said positional coordinates of said spot measured by said measuring section to positional coordinates that are reflected on image data after the processing acquired as a result of a process performed by said processing section; wherein the area before processing, represented by the image data before processing by the processing section, is a quadrangle, and the area after processing, represented by the image data after the processing by the processing section, is a rectangle; and wherein said processing section: (i) acquires a first pair of lines, each of which passes through the spot in said area after processing and perpendicularly intersects two opposite sides of said rectangle that defines said area after processing, (ii) acquires a second pair of lines that internally divide two opposite sides of said quadrangle that defines said area before processing, by an interior division ratio by which said first pair of lines internally divide said two opposite sides of said rectangle, and (iii) processes said image data in such a way that the spot at a point of intersection of said second pair of lines is positioned at a point of intersection of said first pair of lines after processing.