High Bit is 0 not 1 for binary segmentations.

michaelonken · michaelonken · commit 3e85b3744410 · 2025-12-18T17:53:47.000+01:00
diff --git a/dcmseg/libsrc/segdoc.cc b/dcmseg/libsrc/segdoc.cc
@@ -1495,7 +1495,7 @@ OFCondition DcmSegmentation::writeSegmentationImageModule(DcmItem& dataset)
             {
                 bitsAlloc = 1;
                 bitsStored = 1;
-                highBit = 1;
+                highBit = 0;
                 dataset.putAndInsertOFStringArray(DCM_SegmentationType, "BINARY");
                 dataset.putAndInsertOFStringArray(DCM_SegmentsOverlap, "UNDEFINED");
                 break;

Original file line number	Diff line number	Diff line change
`@@ -1495,7 +1495,7 @@ OFCondition DcmSegmentation::writeSegmentationImageModule(DcmItem& dataset)`
`1495`	`1495`	`{`
`1496`	`1496`	`bitsAlloc = 1;`
`1497`	`1497`	`bitsStored = 1;`
`1498`		`- highBit = 1;`
	`1498`	`+ highBit = 0;`
`1499`	`1499`	`dataset.putAndInsertOFStringArray(DCM_SegmentationType, "BINARY");`
`1500`	`1500`	`dataset.putAndInsertOFStringArray(DCM_SegmentsOverlap, "UNDEFINED");`
`1501`	`1501`	`break;`