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gdcmJPEGLSCodec.h
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    00001 /*=========================================================================
    00002
    00003   Program: GDCM (Grassroots DICOM). A DICOM library
    00004
    00005   Copyright (c) 2006-2011 Mathieu Malaterre
    00006   All rights reserved.
    00007   See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
    00008
    00009      This software is distributed WITHOUT ANY WARRANTY; without even
    00010      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
    00011      PURPOSE.  See the above copyright notice for more information.
    00012
    00013 =========================================================================*/
    00014 #ifndef GDCMJPEGLSCODEC_H
    00015 #define GDCMJPEGLSCODEC_H
    00016
    00017 #include "gdcmImageCodec.h"
    00018
    00019 namespace gdcm
    00020 {
    00021
    00022 class JPEGLSInternals;
    00030 class GDCM_EXPORT JPEGLSCodec : public ImageCodec
    00031 {
    00032 public:
    00033   JPEGLSCodec();
    00034   ~JPEGLSCodec();
    00035   bool CanDecode(TransferSyntax const &ts) const;
    00036   bool CanCode(TransferSyntax const &ts) const;
    00037
    00038   unsigned long GetBufferLength() const { return BufferLength; }
    00039   void SetBufferLength(unsigned long l) { BufferLength = l; }
    00040
    00041   bool Decode(DataElement const &is, DataElement &os);
    00042   bool Decode(DataElement const &in, char* outBuffer, uint32_t inBufferLength,
    00043               uint32_t inXMin, uint32_t inXMax, uint32_t inYMin,
    00044               uint32_t inYMax, uint32_t inZMin, uint32_t inZMax);
    00045   bool Code(DataElement const &in, DataElement &out);
    00046
    00047   bool GetHeaderInfo(std::istream &is, TransferSyntax &ts);
    00048
    00049   void SetLossless(bool l);
    00050   bool GetLossless() const;
    00051
    00052 /*
    00053  * test.acr can look pretty bad, even with a lossy error of 2. Explanation follows:
    00054  * I agree that the test image looks ugly. In this particular case I can
    00055  * explain though.
    00056  *
    00057  * The image is 8 bit, but it does not use the full 8 bit dynamic range. The
    00058  * black pixels have value 234 and the white 255. If you set allowed lossy
    00059  * error to 2, you allow an error of about 10% of the actual dynamic range.
    00060  * That is of course very visible.
    00061  */
    00063   void SetLossyError(int error);
    00064
    00065 private:
    00066   unsigned long BufferLength;
    00067   bool Lossless;
    00068   int LossyError;
    00069 };
    00070
    00071 } // end namespace gdcm
    00072
    00073 #endif //GDCMJPEGLSCODEC_H