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Shows differences on two PDF pages by adding highlight annotations.

Component Version macOS Windows Linux Server iOS SDK
DynaPDF 5.3 ✅ Yes ✅ Yes ✅ Yes ✅ Yes ✅ Yes
MBS( "DynaPDF.ShowDifferences"; PDF; pageIndex1; OtherPDF; pageIndex2 { ; CheckMoving; HighlightColor; Scale; ColorTolerance; Debug } )   More


Parameter Description Example Flags
PDF The PDF reference returned from DynaPDF.New. $pdf
pageIndex1 The page index in first PDF context. 1
OtherPDF The other PDF reference. Can be same as PDF parameter, but allows you to use PDF imported in other PDF context. $pdf2
pageIndex2 The page index in second PDF context. 1
CheckMoving Whether to check for moving parts, e.g. the big part of the page shifted up one line. Default is zero. 1 Optional
HighlightColor Default is 65535 for yellow (Full red and green). Optional
Scale Scale of the raster.
Default is to compare at 72dpi.
If you pass 2 here, we use 144dpi.
1 Optional
ColorTolerance The tolerance for color comparison.
Colors where red, green or blue components are within given tolerance are considered equal. So FFFFFF and FFFFFD are equal.
Default is 3.
3 Optional
Debug Whether to write debug images to temp folder.
If 1, we write png files to temp folder. One image is before the check, one with all similar lines removed and one with result of comparison. Red pixels show you the raster, green equal pixels.
0 Optional


Returns number of annotations or error.


Shows differences on two PDF pages by adding highlight annotations.
Returns OK on success which means that highlight annotations have been added to both pages.
You can than render a page to show differences to user.
Requires a DynaPDF Pro license. Without a license, the DynaPDF watermark will reduce the accuracy.


Show differences:

Set Variable [ $r; Value:MBS("DynaPDF.ShowDifferences"; $pdf1; 1; $pdf2; 1; 1) ]

See also

Release notes

Example Databases

Blog Entries

This function checks for a license.

Created 22nd September 2015, last changed 3th January 2021

DynaPDF.SetXFAStream - DynaPDF.SkewCoords