Variable scaling of image data for aspect ratio conversion

摘要

A mechanism for enabling a user to vary the scale or zoom of image data for aspect ratio conversion using a graphical user interface is disclosed. A user may move a selector of the graphical user interface to one end for selecting a linear scaling, to the other end for selecting a parabolic scaling or in between for selecting a scaling associated with another function, thereby enabling a user to vary the magnitude of the scaling across the image data. A parametric function with a single parameter may be used to scale the image data, where the movement of the selector may change the parameter and consequently vary the scaling of the image data. In this manner, a user may efficiently vary or select the scaling of the image data using a graphical user interface to reduce objectionable distortion associated with changing the aspect ratio of the image data.

主权项

1. A method of scaling image data, said method comprising:
displaying on a display screen a graphical user interface for enabling a user to select a selected variable scaling value from a plurality of variable scaling values, said selected variable scaling value for scaling first image data; in response to a user selection of said selected variable scaling value using said graphical user interface, scaling said first image data based on an average of said selected variable scaling value and an automatically determined variable scaling value to generate second image data; and rendering said second image data on said display screen, wherein at least one variable scaling value of said plurality of variable scaling values is based on a source aspect ratio data associated with said first image data and a destination aspect ratio data, wherein said scaling said first image data comprises scaling a first portion of a frame of said first image data using a first scale and a second portion of said frame of said first image data using a second scale not equal to said first scale, said first and second scales being functions of said selected variable scaling value, further wherein, said selected variable scaling value acts as a constraint on said automatically determined variable scaling value.