This call registers the supported encoders/decoders to the central list of codecs managed by the dcmdata module. By doing so, dcmdata is able to change the encoding by compressing/decompressing the pixel data of a DICOM dataset. This is usually done by calling chooseRepresentation() on the dataset. The DicomImage class does this internally, so it also supports compressed DICOM images after registration.
Okkay i got it . we have to specify the transfer syntax and Representation Parameter through chooseRepresentation() , where internal data set maintained by DCMTK contains a collection of it .
right ???