Program: gdcm
Module: $RCSfile: WriteDicomAsJPEG.cxx,v $
Language: C++
- Date: $Date: 2005/10/19 17:56:57 $
- Version: $Revision: 1.7 $
+ Date: $Date: 2005/10/19 22:19:20 $
+ Version: $Revision: 1.8 $
Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
l'Image). All rights reserved. See Doc/License.txt or
typedef std::pair<size_t, uint32_t> JpegPair; //offset, jpeg size
typedef std::vector<JpegPair> JpegVector;
+void WriteDICOMItems(std::ostream *fp, JpegVector &v)
+{
+ // Item tag:
+ uint16_t group = 0xfffe;
+ uint16_t elem = 0xe000;
+ gdcm::binary_write(*fp, group);
+ gdcm::binary_write(*fp, elem);
+ // Item Length
+ uint32_t dummy = 0x12345678;
+ size_t offset = fp->tellp();
+ JpegPair jp;
+ jp.first = offset;
+ v.push_back(jp);
+ gdcm::binary_write(*fp, dummy);
+}
+
// PS 3.5, page 66
-void EncodeWithoutBasicOffsetTable(std::ostream *fp, int numFrag, JpegVector& v) //, uint32_t length)
+void EncodeWithoutBasicOffsetTable(std::ostream *fp, int numFrag)// JpegVector& v) //, uint32_t length)
{
assert( numFrag == 1);
uint32_t item_length = 0x0000;
gdcm::binary_write(*fp, item_length);
- // back again...First fragment
+}
+
+// PS 3.5, page 67
+void EncodeWithBasicOffsetTable(std::ostream *fp, int numFrag, size_t &start)
+{
// Item tag:
+ uint16_t group = 0xfffe;
+ uint16_t elem = 0xe000;
gdcm::binary_write(*fp, group);
gdcm::binary_write(*fp, elem);
// Item Length
- uint32_t dummy = 0x12345678;
- size_t offset = fp->tellp();
- JpegPair jp;
- jp.first = offset;
- v.push_back(jp);
- gdcm::binary_write(*fp, dummy);
+ uint32_t item_length = numFrag*4; // sizeof(uint32_t)
+ gdcm::binary_write(*fp, item_length);
+
+ // Just prepare the space
+ start = fp->tellp(); //to be able to rewind
+ for(int i=0; i<numFrag;++i)
+ {
+ uint32_t dummy = 0x0000;
+ gdcm::binary_write(*fp, dummy);
+ }
+}
+
+void UpdateBasicOffsetTable(std::ostream *fp, JpegVector const &v, size_t pos)
+{
+ JpegVector::const_iterator i;
+ fp->seekp( pos );
+ const JpegPair &first = v[0];
+ for(i=v.begin(); i!=v.end(); ++i)
+ {
+ const JpegPair &jp = *i;
+ if(i == v.begin() ){ assert( jp.first - first.first == 0); }
+ gdcm::binary_write(*fp, jp.first - first.first);
+ std::cerr << "Updating Table:" << jp.first - first.first << std::endl;
+ }
}
void UpdateJpegFragmentSize(std::ostream *fp, JpegVector const &v)
const JpegPair &jp = *i;
fp->seekp( jp.first );
gdcm::binary_write(*fp, jp.second );
+ std::cerr << "Updating:" << jp.first << "," << jp.second << std::endl;
}
}
UpdateJpegFragmentSize(fp, v);
}
-
-// PS 3.5, page 67
-void EncodeWithBasicOffsetTable(std::ostream *fp, int numFrag)
-{
- (void)fp; (void)numFrag;
-}
-
bool InitializeJpeg(std::ostream *fp, int fragment_size, int image_width, int image_height,
int sample_pixel, int quality, struct jpeg_compress_struct &cinfo, int &row_stride)
{
* since the defaults depend on the source color space.)
*/
jpeg_set_defaults(&cinfo);
+ /*
+ * http://www.koders.com/c/fid80DBBF1D49D004EF71CE7C493C34610C4F17D3D3.aspx
+ * http://studio.imagemagick.org/pipermail/magick-users/2002-September/004685.html
+ * You need to set -quality 101 or greater. If quality is 100 or less you
+ * get regular JPEG output. This is not explained in the documentation, only
+ * in the comments in coder/jpeg.c. When you have configured libjpeg with
+ * lossless support, then
+ *
+ * quality=predictor*100 + point_transform
+ *
+ * If you don't know what these values should be, just use 101.
+ * They only affect the compression ratio, not the image appearance,
+ * which is lossless.
+ */
+ jpeg_simple_lossless (&cinfo, 1, 1);
/* Now you can set any non-default parameters you wish to.
* Here we just illustrate the use of quality (quantization table) scaling:
*/
// input_buffer is ONE image
// fragment_size is the size of this image (fragment)
bool CreateOneFrame (std::ostream *fp, void *input_buffer, int fragment_size,
- int image_width, int image_height, int sample_pixel, int quality, JpegVector &v)
+ int image_width, int image_height, int numZ, int sample_pixel, int quality, JpegVector &v)
{
struct jpeg_compress_struct cinfo;
int row_stride; /* physical row width in image buffer */
+ size_t beg = fp->tellp();
bool r = InitializeJpeg(fp, fragment_size, image_width, image_height,
sample_pixel, quality, cinfo, row_stride);
assert( r );
+ (void)numZ;
- r = WriteScanlines(cinfo, input_buffer, row_stride);
- assert( r );
+ uint8_t *pbuffer = (uint8_t*)input_buffer;
+ //int i;
+ //for(i=0; i<numZ; ++i)
+// {
+ r = WriteScanlines(cinfo, pbuffer, row_stride);
+ assert( r );
+// pbuffer+=fragment_size; //shift to next image
+
+ //Upodate frag size
+// size_t end = fp->tellp();
+// std::cerr << "DIFF: " << end-beg << std::endl;
+
+// JpegPair &jp = v[i];
+// jp.second = end-beg;
+ //beg = end; //
+ // }
r = FinalizeJpeg(cinfo);
assert( r );
+ size_t end = fp->tellp();
+ static int i = 0;
+ JpegPair &jp = v[i];
+ jp.second = end-beg;
+ std::cerr << "DIFF: " << i <<" -> " << end-beg << std::endl;
+ ++i;
- JpegPair &jp = v[0];
- jp.second = 15328;
+ //JpegPair &jp = v[0];
+ //jp.second = 15328;
return true;
}
+//bool CreateMultipleFrames (std::ostream *fp, void *input_buffer, int fragment_size,
+// int image_width, int image_height, int sample_pixel, int quality, JpegVector &v)
+//{
+//}
+
+#define WITHOFFSETTABLE 1
+
// Open a dicom file and compress it as JPEG stream
int main(int argc, char *argv[])
{
if( argc < 2)
return 1;
- std::string filename = argv[1];
+ std::string filename = argv[1];
+ std::string outfilename = "/tmp/bla.dcm";
+ if( argc >= 3 )
+ outfilename = argv[2];
+ int quality = 100;
+ if( argc >= 4 )
+ quality = atoi(argv[2]);
+ std::cerr << "Using quality: " << quality << std::endl;
// Step 1 : Create the header of the image
gdcm::File *f = new gdcm::File();
std::string PixelType = tested->GetFile()->GetPixelType();
int xsize = f->GetXSize();
int ysize = f->GetYSize();
+ int zsize = f->GetZSize();
int samplesPerPixel = f->GetSamplesPerPixel();
size_t testedDataSize = tested->GetImageDataSize();
int fragment_size = xsize*ysize*samplesPerPixel;
JpegVector JpegFragmentSize;
- //EncodeWithoutBasicOffsetTable(of, 1, 15328);
- EncodeWithoutBasicOffsetTable(of, 1, JpegFragmentSize); //, 15328);
- CreateOneFrame(of, testedImageData, fragment_size, xsize, ysize, samplesPerPixel, 100, JpegFragmentSize);
+#if WITHOFFSETTABLE
+ size_t bots; //basic offset table start
+ EncodeWithBasicOffsetTable(of, zsize, bots);
+#else
+ EncodeWithoutBasicOffsetTable(of, 1);
+#endif
+ uint8_t *pImageData = testedImageData;
+ for(int i=0; i<zsize;i++)
+ {
+ WriteDICOMItems(of, JpegFragmentSize);
+ CreateOneFrame(of, pImageData, fragment_size, xsize, ysize, zsize,
+ samplesPerPixel, quality, JpegFragmentSize);
+ pImageData += fragment_size;
+ }
CloseJpeg(of, JpegFragmentSize);
+#if WITHOFFSETTABLE
+ UpdateBasicOffsetTable(of, JpegFragmentSize, bots);
+#endif
if( !f->IsReadable() )
{
std::streambuf* sb = of->rdbuf();
(void)sb;
+ // Let save the file as jpeg standalone
+ {
+ std::ofstream *jof = new std::ofstream( "/tmp/test.jpg" );
+ CreateOneFrame(jof, testedImageData, fragment_size, xsize, ysize, zsize,
+ samplesPerPixel, 70, JpegFragmentSize);
+ jof->close();
+ delete jof;
+ }
str << ysize;
fileToBuild->InsertEntryString(str.str(),0x0028,0x0010); // Rows
- //if(img.sizeZ>1)
- //{
- // str.str("");
- // str << img.sizeZ;
- // fileToBuild->InsertEntryString(str.str(),0x0028,0x0008); // Number of Frames
- //}
+ if(zsize>1)
+ {
+ str.str("");
+ str << zsize;
+ fileToBuild->InsertEntryString(str.str(),0x0028,0x0008); // Number of Frames
+ }
// Set the pixel type
str.str("");
// {
// img.componentSize += 8-img.componentSize%8;
// }
- size_t size = xsize * ysize * 1 /*Z*/
+ size_t size = xsize * ysize * zsize
* samplesPerPixel /* * img.componentSize / 8*/;
uint8_t *imageData = new uint8_t[size];
//str::string *s = of->str();
//fileH->SetWriteTypeToDcmExplVR();
fileH->SetWriteTypeToJPEG( );
- std::string fileName = "/tmp/bla.dcm";
- if( !fileH->Write(fileName) )
+ if( !fileH->Write(outfilename) )
{
std::cerr << "Badddd" << std::endl;
}
projects / gdcm.git / commitdiff