Hi,
dicom files have many fields of metadata. In general these are parsed
and stored in the image properties.
Unfortunately for dicom files which contain jpeg encoded images, a
separate image is written out and passed to the jpeg coder to read and
all the metadata is lost.
As a simple way of maintaining this data I have delayed the destroy of
the dicom image and read the jpeg_image into a separate variable, and
then copied all the parameters from the dicom to the jpeg.
The patch against subversion is below if you think this is useful.
Shane.
Index: coders/dcm.c
===================================================================
--- coders/dcm.c (revision 8485)
+++ coders/dcm.c (working copy)
@@ -3196,6 +3196,10 @@
if ((strcmp(transfer_syntax,"1.2.840.10008.1.2.4.50") == 0) ||
(strcmp(transfer_syntax,"1.2.840.10008.1.2.4.70") == 0))
{
+ const char
+ *property,
+ *property_value;
+
char
filename[MaxTextExtent];
@@ -3206,6 +3210,9 @@
c,
unique_file;
+ Image
+ *jpeg_image;
+
ImageInfo
*read_info;
@@ -3244,15 +3251,22 @@
c=ReadBlobByte(image);
}
(void) fclose(file);
- image=DestroyImage(image);
read_info=CloneImageInfo(image_info);
SetImageInfoBlob(read_info,(void *) NULL,0);
(void) FormatMagickString(read_info->filename,MaxTextExtent,
"jpeg:%s",filename);
- image=ReadImage(read_info,exception);
+ jpeg_image=ReadImage(read_info,exception);
+ /* Copy dcm attributes from image to jpeg image */
+ ResetImagePropertyIterator(image);
+ while(NULL != (property = GetNextImageProperty(image)))
+ {
+ property_value = GetImageProperty(image,property);
+ (void) SetImageProperty(jpeg_image,property,property_value);
+ }
+ image=DestroyImage(image);
(void) RelinquishUniqueFileResource(filename);
read_info=DestroyImageInfo(read_info);
- return(GetFirstImageInList(image));
+ return(GetFirstImageInList(jpeg_image));
}
scale=(Quantum *) NULL;
if (depth != (1UL*QuantumDepth))
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