[IMAGING-19] Incorrect reading Physical Width/Height Dpi and Physical Width/Height Inch from TIFF files

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0-alpha1, 1.1, 1.x
• Fix Version/s: 1.0-alpha1
• Component/s: Format: TIFF
• Labels: patch
• Assignee: Unassigned
• Reporter: VVD
• Created: 18/Mar/12 11:36
• Updated: 03/May/19 08:39
• Resolved: 12/Apr/12 03:41

Description

Width: 3509
Physical Width Dpi: 4650
Physical Width Inch: 1169.667
Height: 2481
Physical Height Dpi: 4650
Physical Height Inch: 827.00024

TiffImageParser.java (196):
-        case 3: // Meter
-            unitsPerInch = 0.0254;
+        case 3: // Centimeter
+            unitsPerInch = 2.54;
(c) http://partners.adobe.com/public/developer/en/tiff/TIFF6.pdf

TiffImageParser.java (218):
-                physicalWidthDpi = (int) (XResolutionPixelsPerUnit / unitsPerInch);
+                physicalWidthDpi = (int) Math.round(XResolutionPixelsPerUnit * unitsPerInch);
TiffImageParser.java (226):
-                physicalHeightDpi = (int) (YResolutionPixelsPerUnit / unitsPerInch);
+                physicalHeightDpi = (int) Math.round(YResolutionPixelsPerUnit * unitsPerInch);

After this patch I got correct values:
Width: 3509
Physical Width Dpi: 300
Physical Width Inch: 11.69667
Height: 2481
Physical Height Dpi: 300
Physical Height Inch: 8.2700024

May be need to patch writing of tiff image too - don't know.

P.S. GIMP show values: 300,000, 300,000, 11,697, 8,270.