Image display method

Claim 1

An image display method in which an image to be presented is displayed on an apparatus having a CRT display screen and memory means for storing data, said method comprising the steps of: (a) entering into the memory means, picture information defining the image to presented; (b) entering into the memory means, a horizontal dimension L x and a vertical dimension L y of the image to be presented; (c) storing lengths B x , B y of the horizontal and vertical direction of the display screen in the memory means said lengths corresponding to a display area in said memory means; (d) calculating a magnification K based upon said lengths B x , B y as well as said dimensions L x , L y ; (e) multiplying said picture information defining the image to be presented by the magnification factor K; (f) obtaining starting point coordinate values (X s , Y s ) within said memory means of the image to be presented following multiplication thereof by K; (g) specifying starting point coordinate values (X s ', Y s ') within said display area of said memory means of the desired location of the image on the display screen; (h) calculating shift quantities S x , S y for the horizontal and vertical directions based upon the coordinate values (X s , Y s ), (X s ', Y s ') of both starting points; and (i) displaying the complete image on the CRT display screen by using said picture information, said starting point coordinate values, said magnification factor and the shift quantities.