| abstract |
The invention relates to a method of composing digital images. The pixel color values and opacity values of a source and a destination image ( 1,2 ) are combined in accordance with a set of blending equations. The invention proposes blending equations involving the source and destination opacity values, such that the opacity of the destination image is reduced, wherein the decrease of the opacity values of the destination image ( 2 ) is controlled by the opacity values of the source image ( 1 ). The blending method of the invention imitates aquarelle painting. In real aquarelle painting, the previously painted (destination) image can be partially dissolved by the water which is used in painting on top of the previous image. Likewise, the invention proposes a decrease of the opacity of the destination image ( 2 ) proportionally to the opacity of the source image ( 1 ), thereby reducing the opacity of the resulting image ( 8 ) in those regions ( 9 ) where the source image ( 1 ) is opaque. |