Fix to calculation of DPI in pixels/m when returned in IIP OBJ request

ruven · Jan 25, 2024 · f88a826 · f88a826
1 parent d22556c
commit f88a826
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Showing 2 changed files with 6 additions and 2 deletions.
diff --git a/ChangeLog b/ChangeLog
@@ -1,3 +1,7 @@
+25/01/2024:
+	- Fix to calculation of DPI in pixels/m when returned in IIP OBJ request
+
+
 16/01/2024:
 	- Added ability to specify lossless WebP compression by specifying a quality factor of -1
 

diff --git a/src/IIPImage.h b/src/IIPImage.h
@@ -397,10 +397,10 @@ class IIPImage {
   };
 
   /// Return physical resolution (DPI) in pixels/meter horizontally
-  float getHorizontalDPI() const { return (dpi_units==2) ? dpi_x*10.0 : ( (dpi_units==1) ? dpi_x*25.4 : dpi_x ); };
+  float getHorizontalDPI() const { return (dpi_units==2) ? dpi_x*100.0 : ( (dpi_units==1) ? dpi_x/0.0254 : dpi_x ); };
 
   /// Return physical resolution (DPI) in pixels/meter vertically
-  float getVerticalDPI() const { return (dpi_units==2) ? dpi_y*10.0 : ( (dpi_units==1) ? dpi_y*25.4 : dpi_y ); };
+  float getVerticalDPI() const { return (dpi_units==2) ? dpi_y*100.0 : ( (dpi_units==1) ? dpi_y/0.0254 : dpi_y ); };
 
   /// Return whether this image type directly handles region decoding
   virtual bool regionDecoding(){ return false; };