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/Images/OCR/OCR with picture
Required plugins for this example: MBS Images Plugin
You find this example project in your Plugins Download as a Xojo project file within the examples folder: /Images/OCR/OCR with picture
This example is the version from Sun, 13th Oct 2018.
Project "OCR with picture.rbp"
Class App Inherits Application
Const kEditClear = "&Löschen"
Const kFileQuit = "Beenden"
Const kFileQuitShortcut = ""
EventHandler Function UnhandledException(error As RuntimeException) As Boolean MsgBox error.Message+EndOfLine+EndOfLine+Join(error.Stack,EndOfLine) End EventHandler
End Class
Class Window1 Inherits Window
Control EditField1 Inherits TextArea
ControlInstance EditField1 Inherits TextArea
End Control
Control CheckBox1 Inherits CheckBox
ControlInstance CheckBox1 Inherits CheckBox
EventHandler Sub Action() Refresh End EventHandler
End Control
Control CheckBox2 Inherits CheckBox
ControlInstance CheckBox2 Inherits CheckBox
EventHandler Sub Action() Refresh End EventHandler
End Control
Control Out Inherits Canvas
ControlInstance Out Inherits Canvas
EventHandler Sub Paint(g As Graphics, areas() As REALbasic.Rect) if pic<>Nil Then g.DrawPicture pic,0,0 end if g.ForeColor=&cFF0000 // check result dim r as TesseractResultIteratorMBS = o.ResultIterator if r<>Nil and CheckBox2.Value then do // query values like confidence g.ForeColor=&c000000 if CheckBox1.Value then dim Confidence as Double = r.Confidence(r.kLevelWord) g.ForeColor=Rgb((100-Confidence)*2.55, Confidence*2.55, 0) end if dim rleft, rtop, rright, rbottom as integer // query bounding box if r.BoundingBox(r.kLevelWord, rleft, rtop, rright, rbottom) then dim rwidth as integer = rright - rleft dim rheight as integer = rbottom - rtop g.DrawRect rleft, rtop, rwidth, rHeight end if // and go to next word loop until r.NextItem(r.kLevelWord) = false end if End EventHandler
End Control
EventHandler Sub Open() // search tessdata folder dim fo as FolderItem = findfile("tessdata") if TargetWin32 then // on Windows the parent folder fo = fo.Parent else // path must be correct to have it find the files and point to folder where tessdata folder is inside fo = GetFolderItem("") end if o = new TesseractMBS(fo, "eng") dim n as integer = o.NumDawgs if n = 0 then MsgBox "No lang data found!" quit end if dim f as FolderItem // pick a test file if rnd<0.5 then f = findfile("eurotext.tif") else f = findfile("phototest.tif") end if dim p as Picture = f.OpenAsPicture if o.SetImage(p) then EditField1.text = o.getText pic=p end if Exception ex as TesseractErrorExceptionMBS MsgBox "Exception: "+ex.message End EventHandler
Function FindFile(name as string) As FolderItem // Look for file in parent folders from executable on dim parent as FolderItem = app.ExecutableFile.Parent while parent<>Nil dim file as FolderItem = parent.Child(name) if file<>Nil and file.Exists then Return file end if parent = parent.Parent wend End Function
Property o As TesseractMBS
Property pic As Picture
End Class
MenuBar MenuBar1
MenuItem FileMenu = "&Ablage"
MenuItem FileQuit = "#App.kFileQuit"
MenuItem EditMenu = "&Bearbeiten"
MenuItem EditUndo = "&Rückgängig"
MenuItem UntitledMenu1 = "-"
MenuItem EditCut = "&Ausschneiden"
MenuItem EditCopy = "&Kopieren"
MenuItem EditPaste = "&Einfügen"
MenuItem EditClear = "#App.kEditClear"
MenuItem UntitledMenu0 = "-"
MenuItem EditSelectAll = "&Alles auswählen"
End MenuBar
End Project

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