- request
- A System.Runtime.Serialization.DataContractAttribute containing the data that will be used in this Leadtools.Services.ImageProcessing.ServiceContracts.IDocumentProcessingService.InvertedPage operation.
Visual Basic (Declaration) | |
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<OperationContractAttribute("InvertedPage")> <FaultContractAttribute(DetailType=Leadtools.Services.Raster.FaultContracts.RasterFault, Action="", Name="", Namespace="", ProtectionLevel=ProtectionLevel.None, HasProtectionLevel=False)> Function InvertedPage( _ ByVal request As InvertedPageRequest _ ) As InvertedPageResponse |
Visual Basic (Usage) | Copy Code |
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Dim instance As IDocumentProcessingService Dim request As InvertedPageRequest Dim value As InvertedPageResponse value = instance.InvertedPage(request) |
C# | |
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[OperationContractAttribute("InvertedPage")] [FaultContractAttribute(DetailType=Leadtools.Services.Raster.FaultContracts.RasterFault, Action="", Name="", Namespace="", ProtectionLevel=ProtectionLevel.None, HasProtectionLevel=false)] InvertedPageResponse InvertedPage( InvertedPageRequest request ) |
C++/CLI | |
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[OperationContractAttribute("InvertedPage")] [FaultContractAttribute(DetailType=Leadtools.Services.Raster.FaultContracts.RasterFault, Action="", Name="", Namespace="", ProtectionLevel=ProtectionLevel.None, HasProtectionLevel=false)] InvertedPageResponse^ InvertedPage( InvertedPageRequest^ request ) |
Parameters
- request
- A System.Runtime.Serialization.DataContractAttribute containing the data that will be used in this Leadtools.Services.ImageProcessing.ServiceContracts.IDocumentProcessingService.InvertedPage operation.
Return Value
A System.Runtime.Serialization.DataContractAttribute containing the modified image resulting from the Leadtools.Services.ImageProcessing.ServiceContracts.IDocumentProcessingService.InvertedPage operation.
This example will show how to use the Leadtools.Services.ImageProcessing.ServiceContracts.IDocumentProcessingService.InvertedPage operation to check and auto-correct inverted images.
Visual Basic | Copy Code |
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Public Sub InvertedPageExample() ' Get an image Dim tifFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "ocr1.tif") Dim invertedImageFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "ocr1_Inverted.tif") Dim nonInvertedImageFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "ocr1_NonInverted.tif") Dim documentProcessingClient As DocumentProcessingServiceClient = New DocumentProcessingServiceClient() Dim sourceBinaryData As RawBinaryData = New RawBinaryData() sourceBinaryData.Data = File.ReadAllBytes(tifFileName) Dim convertOptions As RasterConvertOptions = New RasterConvertOptions() convertOptions.Source = sourceBinaryData convertOptions.Destination = Nothing convertOptions.Format = RasterImageFormat.Tif convertOptions.FirstPage = 1 convertOptions.LastPage = 1 convertOptions.BitsPerPixel = 1 convertOptions.QualityFactor = 2 Dim invertedPageRequest As InvertedPageRequest = New InvertedPageRequest() invertedPageRequest.Flags = InvertedPageFlags.NoProcess invertedPageRequest.ConvertOptions = convertOptions invertedPageRequest.RegionData = Nothing Dim invertedPageResponse As InvertedPageResponse = documentProcessingClient.InvertedPage(invertedPageRequest) Console.WriteLine("Original image, inverted = {0}", invertedPageResponse.IsInverted) ' Invert the image Dim invertRequest As InvertRequest = New InvertRequest() invertRequest.ConvertOptions = convertOptions Dim colorProcessingClient As ColorProcessingServiceClient = New ColorProcessingServiceClient() Dim invertResponse As CommandResponse = colorProcessingClient.Invert(invertRequest) If Not invertResponse.Destination Is Nothing Then If TypeOf invertResponse.Destination Is RawBinaryData Then File.WriteAllBytes(invertedImageFileName, (TryCast(invertResponse.Destination, RawBinaryData)).Data) End If End If colorProcessingClient.Close() ' Check again convertOptions.Source = invertResponse.Destination invertedPageRequest.ConvertOptions = convertOptions invertedPageResponse = documentProcessingClient.InvertedPage(invertedPageRequest) Console.WriteLine("After running InvertCommand, inverted = {0}", invertedPageResponse.IsInverted) ' Now run the command to un-invert the image convertOptions.Source = invertedPageResponse.Destination invertedPageRequest.Flags = InvertedPageFlags.Process invertedPageResponse = documentProcessingClient.InvertedPage(invertedPageRequest) ' Now check the image again convertOptions.Source = invertedPageResponse.Destination invertedPageRequest.Flags = InvertedPageFlags.NoProcess invertedPageResponse = documentProcessingClient.InvertedPage(invertedPageRequest) Console.WriteLine("After running InvertedPageCommand, inverted = {0}", invertedPageResponse.IsInverted) If Not invertedPageResponse.Destination Is Nothing Then If TypeOf invertedPageResponse.Destination Is RawBinaryData Then File.WriteAllBytes(nonInvertedImageFileName, (TryCast(invertedPageResponse.Destination, RawBinaryData)).Data) End If End If End Sub Public NotInheritable Class LEAD_VARS Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" End Class |
C# | Copy Code |
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public void InvertedPageExample() { // Get an image string tifFileName = Path.Combine(LEAD_VARS.ImagesDir,"ocr1.tif"); string invertedImageFileName = Path.Combine(LEAD_VARS.ImagesDir,"ocr1_Inverted.tif"); string nonInvertedImageFileName = Path.Combine(LEAD_VARS.ImagesDir,"ocr1_NonInverted.tif"); DocumentProcessingServiceClient documentProcessingClient = new DocumentProcessingServiceClient(); RawBinaryData sourceBinaryData = new RawBinaryData(); sourceBinaryData.Data = File.ReadAllBytes(tifFileName); RasterConvertOptions convertOptions = new RasterConvertOptions(); convertOptions.Source = sourceBinaryData; convertOptions.Destination = null; convertOptions.Format = RasterImageFormat.Tif; convertOptions.FirstPage = 1; convertOptions.LastPage = 1; convertOptions.BitsPerPixel = 1; convertOptions.QualityFactor = 2; InvertedPageRequest invertedPageRequest = new InvertedPageRequest(); invertedPageRequest.Flags = InvertedPageCommandFlags.NoProcess; invertedPageRequest.ConvertOptions = convertOptions; invertedPageRequest.RegionData = null; InvertedPageResponse invertedPageResponse = documentProcessingClient.InvertedPage(invertedPageRequest); Console.WriteLine("Original image, inverted = {0}", invertedPageResponse.IsInverted); // Invert the image InvertRequest invertRequest = new InvertRequest(); invertRequest.ConvertOptions = convertOptions; ColorProcessingServiceClient colorProcessingClient = new ColorProcessingServiceClient(); CommandResponse invertResponse = colorProcessingClient.Invert(invertRequest); if (invertResponse.Destination != null) { if (invertResponse.Destination is RawBinaryData) File.WriteAllBytes(invertedImageFileName, (invertResponse.Destination as RawBinaryData).Data); } colorProcessingClient.Close(); // Check again convertOptions.Source = invertResponse.Destination; invertedPageRequest.ConvertOptions = convertOptions; invertedPageResponse = documentProcessingClient.InvertedPage(invertedPageRequest); Console.WriteLine("After running InvertCommand, inverted = {0}", invertedPageResponse.IsInverted); // Now run the command to un-invert the image convertOptions.Source = invertedPageResponse.Destination; invertedPageRequest.Flags = InvertedPageCommandFlags.Process; invertedPageResponse = documentProcessingClient.InvertedPage(invertedPageRequest); // Now check the image again convertOptions.Source = invertedPageResponse.Destination; invertedPageRequest.Flags = InvertedPageCommandFlags.NoProcess; invertedPageResponse = documentProcessingClient.InvertedPage(invertedPageRequest); Console.WriteLine("After running InvertedPageCommand, inverted = {0}", invertedPageResponse.IsInverted); if (invertedPageResponse.Destination != null) { if (invertedPageResponse.Destination is RawBinaryData) File.WriteAllBytes(nonInvertedImageFileName, (invertedPageResponse.Destination as RawBinaryData).Data); } } static class LEAD_VARS { public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; } |
An inverted image is an image that has text or other objects in high contrast color on a low contrast background, for example white text on black background. This operation can check if an image is inverted as well as auto-correct.
This operation can only detect an entire image, to search for and correct specific inverted areas or regions in an image, use Leadtools.Services.ImageProcessing.ServiceContracts.IDocumentProcessingService.InvertedText.
A common source of inverted images are black and white bitmaps saved with non-standard palette by some applications.
This operation does not support signed data images.
For more information, refer to Cleaning Up 1-Bit Images.
Target Platforms: Microsoft .NET Framework 3.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7