Module java.desktop

Class BandCombineOp

java.lang.Object
java.awt.image.BandCombineOp
All Implemented Interfaces:
RasterOp

public class BandCombineOp extends Object implements RasterOp
This class performs an arbitrary linear combination of the bands in a Raster, using a specified matrix.

The width of the matrix must be equal to the number of bands in the source Raster, optionally plus one. If there is one more column in the matrix than the number of bands, there is an implied 1 at the end of the vector of band samples representing a pixel. The height of the matrix must be equal to the number of bands in the destination.

For example, a 3-banded Raster might have the following transformation applied to each pixel in order to invert the second band of the Raster.

   [ 1.0   0.0   0.0    0.0  ]     [ b1 ]
   [ 0.0  -1.0   0.0  255.0  ]  x  [ b2 ]
   [ 0.0   0.0   1.0    0.0  ]     [ b3 ]
                                   [ 1 ]
 

Note that the source and destination can be the same object.