Encoder class for JPEG Baseline (lossy, 8-bit)
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| DJEncoderBaseline () |
| default constructor
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virtual | ~DJEncoderBaseline () |
| destructor
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virtual E_TransferSyntax | supportedTransferSyntax () const |
| returns the transfer syntax that this particular codec is able to encode and decode.
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| DJCodecEncoder () |
| default constructor
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virtual | ~DJCodecEncoder () |
| destructor
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virtual OFCondition | decode (const DcmRepresentationParameter *fromRepParam, DcmPixelSequence *pixSeq, DcmPolymorphOBOW &uncompressedPixelData, const DcmCodecParameter *cp, const DcmStack &objStack) const |
| decompresses the given pixel sequence and stores the result in the given uncompressedPixelData element.
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virtual OFCondition | decodeFrame (const DcmRepresentationParameter *fromParam, DcmPixelSequence *fromPixSeq, const DcmCodecParameter *cp, DcmItem *dataset, Uint32 frameNo, Uint32 &startFragment, void *buffer, Uint32 bufSize, OFString &decompressedColorModel) const |
| decompresses a single frame from the given pixel sequence and stores the result in the given buffer.
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virtual OFCondition | encode (const Uint16 *pixelData, const Uint32 length, const DcmRepresentationParameter *toRepParam, DcmPixelSequence *&pixSeq, const DcmCodecParameter *cp, DcmStack &objStack) const |
| compresses the given uncompressed DICOM image and stores the result in the given pixSeq element.
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virtual OFCondition | encode (const E_TransferSyntax fromRepType, const DcmRepresentationParameter *fromRepParam, DcmPixelSequence *fromPixSeq, const DcmRepresentationParameter *toRepParam, DcmPixelSequence *&toPixSeq, const DcmCodecParameter *cp, DcmStack &objStack) const |
| transcodes (re-compresses) the given compressed DICOM image and stores the result in the given toPixSeq element.
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virtual OFBool | canChangeCoding (const E_TransferSyntax oldRepType, const E_TransferSyntax newRepType) const |
| checks if this codec is able to convert from the given current transfer syntax to the given new transfer syntax
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virtual OFCondition | determineDecompressedColorModel (const DcmRepresentationParameter *fromParam, DcmPixelSequence *fromPixSeq, const DcmCodecParameter *cp, DcmItem *dataset, OFString &decompressedColorModel) const |
| determine color model of the decompressed image
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| DcmCodec () |
| default constructor
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virtual | ~DcmCodec () |
| destructor
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static OFCondition | insertStringIfMissing (DcmItem *dataset, const DcmTagKey &tag, const char *val) |
| helper function that inserts a string attribute with a given value into a dataset if missing in the dataset.
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static OFCondition | convertToSecondaryCapture (DcmItem *dataset) |
| helper function that converts a dataset containing a DICOM image into a valid (standard extended) Secondary Capture object by inserting all attributes that are type 1/2 in Secondary Capture and missing in the source dataset.
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static OFCondition | newInstance (DcmItem *dataset, const char *purposeOfReferenceCodingScheme=NULL, const char *purposeOfReferenceCodeValue=NULL, const char *purposeOfReferenceCodeMeaning=NULL) |
| create new SOP instance UID and Source Image Sequence referencing the old SOP instance (if present)
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static OFCondition | updateImageType (DcmItem *dataset) |
| set first value of Image Type to DERIVED.
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static OFCondition | insertCodeSequence (DcmItem *dataset, const DcmTagKey &tagKey, const char *codingSchemeDesignator, const char *codeValue, const char *codeMeaning) |
| insert code sequence into the given dataset
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static OFCondition | determineStartFragment (Uint32 frameNo, Sint32 numberOfFrames, DcmPixelSequence *fromPixSeq, Uint32 ¤tItem) |
| determine the index number (starting with zero) of the compressed pixel data fragment corresponding to the given frame (also starting with zero)
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static void | appendCompressionRatio (OFString &arg, double ratio) |
| format compression ratio as string and append to given string object.
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static OFCondition | togglePlanarConfiguration8 (Uint8 *pixelData, const unsigned long numValues, const Uint16 samplesPerPixel, const Uint16 oldPlanarConfig) |
| toggles Planar Configuration of 8-bit pixel data from "by pixel" to "by plane" and vice versa.
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static OFCondition | togglePlanarConfiguration16 (Uint16 *pixelData, const unsigned long numValues, const Uint16 samplesPerPixel, const Uint16 oldPlanarConfig) |
| toggles Planar Configuration of 16-bit pixel data from "by pixel" to "by plane" and vice versa.
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Encoder class for JPEG Baseline (lossy, 8-bit)
Definition at line 38 of file djencbas.h.
creates 'derivation description' string after encoding.
- Parameters
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toRepParam | representation parameter passed to encode() |
cp | codec parameter passed to encode() |
bitsPerSample | bits per sample of the original image data prior to compression |
ratio | image compression ratio. This is not the "quality factor" but the real effective ratio between compressed and uncompressed image, i. e. 30 means a 30:1 lossy compression. |
imageComments | image comments returned in this parameter which is initially empty |
Implements DJCodecEncoder.
creates an instance of the compression library to be used for encoding/decoding.
- Parameters
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toRepParam | representation parameter passed to encode() |
cp | codec parameter passed to encode() |
bitsPerSample | bits per sample for the image data |
- Returns
- pointer to newly allocated codec object
Implements DJCodecEncoder.
virtual OFBool DJEncoderBaseline::isLosslessProcess |
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const |
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returns true if the transfer syntax supported by this codec is lossless.
- Returns
- lossless flag
Implements DJCodecEncoder.
virtual E_TransferSyntax DJEncoderBaseline::supportedTransferSyntax |
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const |
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virtual |
returns the transfer syntax that this particular codec is able to encode and decode.
- Returns
- supported transfer syntax
Implements DJCodecEncoder.
The documentation for this class was generated from the following file: