Patent ID: 6980220
Filing Date: 2005-12-27
Classification: G06T

Abstract:
1. A method of compositing two input runs of image data to produce at least one output run of image data, each of the two input runs being categorised by one of a plurality of data types, the method comprising the steps of: determining a data type for the output run from the data types of the two input runs and a predetermined compositing operation, at least one of the data types of the two input runs being a colour blend or opacity blend of at least linear degree; applying the predetermined compositing operation to the two input runs to determine at least a colour difference value or an opacity difference value at an area of intersection of the two input runs, said area of intersection comprising a plurality of pixels represented therein, wherein the determined difference value represents the colour or opacity difference between at least two of said plurality of pixels; and producing the output run according to said output data type utilising the determined colour or opacity difference value.