Patent ID: 6268870
Filing Date: 2001-07-31
Classification: G06F,G09G

Abstract:
An image display method for displaying an image on a screen by converting values of pixels into values for display based on a conversion table, wherein in revising contents of conversion table in response to an operator's action of altering at least one of a window level which indicates a center pixel value of a range of pixel values to be converted into display values between the minimum display value and the maximum display value and a window width which indicates the width of the conversion range, the conversion table is revised only in a range from a start point .alpha. to an end point .beta. calculated as follows, instead of the revision of entire contents of conversion table:.alpha.=max{Rmin, min(WL1-WW1/2, WL2-WW2/2)} (1).beta.=min{Rmax, max(WL1+WW1/2, WL2+WW2/2)} (2)where max{ } is the function of selecting the maximum value, min{ } is the function of selecting the minimum value, Rmin is the lower limit of the revision range, Rmax is the upper limit of the revision range, WL1 is an original window level, WW1 is an original window width, WL2 is a new window level, and WW2 is a new window width.