| CSJ2K.j2k.image.forwcomptransf |
| CSJ2K.j2k.image.input |
| CSJ2K.j2k.image.invcomptransf |
| CSJ2K.j2k.image.output |
| Name | Description |
|---|---|
| ImgDataConverter | This class is responsible of all data type conversions. It should be used, at encoder side, between Tiler and ForwardWT modules and, at decoder side, between InverseWT/CompDemixer and ImgWriter modules. The conversion is realized when a block of data is requested: if source and destination data type are the same one, it does nothing, else appropriate cast is done. All the methods of the 'ImgData' interface are implemented by the 'ImgDataAdapter' class that is the superclass of this one, so they don't need to be reimplemented by subclasses. |
| ImgDataJoiner | This class implements the ImgData interface and allows to obtain data from different sources. Here, one source is represented by an ImgData and a component index. The typical use of this class is when the encoder needs different components (Red, Green, Blue, alpha, ...) from different input files (i.e. from different ImgReader objects). All input ImgData must not be tiled (i.e. must have only 1 tile) and the image origin must be the canvas origin. The different inputs can have different dimensions though (this will lead to different subsampling factors for each component). The input ImgData and component index list must be defined when constructing this class and can not be modified later. |
| Tiler | This class places an image in the canvas coordinate system, tiles it, if so specified, and performs the coordinate conversions transparently. The source must be a 'BlkImgDataSrc' which is not tiled and has a the image origin at the canvas origin (i.e. it is not "canvased"), or an exception is thrown by the constructor. A tiled and "canvased" output is given through the 'BlkImgDataSrc' interface. See the 'ImgData' interface for a description of the canvas and tiling. All tiles produced are rectangular, non-overlapping and their union covers all the image. However, the tiling may not be uniform, depending on the nominal tile size, tiling origin, component subsampling and other factors. Therefore it might not be assumed that all tiles are of the same width and height. The nominal dimension of the tiles is the maximal one, in the reference grid. All the components of the image have the same number of tiles. |