Extract image and change stamp position

Extract Image from an Image Stamp

PdfContentEditor class allows you to extract images from a stamp in a PDF file. First, you need to create an object of PdfContentEditor class and bind input PDF file using BindPdf method. After that, call GetStamps method to get array of StampInfo objects from a particular page of PDF file. Then you can get the image from a StampInfo using StampInfo.Image property. Once you get the image, you can save the image or work with different properties of the image. The following code snippet shows you how to extract image from an image stamp.

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET

public static void ExtractImageFromStamp()
{
    // The path to the documents directory
    string dataDir = RunExamples.GetDataDir_AsposePdfFacades_StampsWatermarks();

    // Instantiate PdfContentEditor object
    using (var pdfContentEditor = new Aspose.Pdf.Facades.PdfContentEditor())
    {
        // Bind input PDF file
        pdfContentEditor.BindPdf(dataDir + "ExtractImage-ImageStamp.pdf");

        // Get Stamp info for the first stamp
        var infos = pdfContentEditor.GetStamps(1);

        // Get the image from Stamp Info
        var image = infos[0].Image;

        // Save the extracted image
        image.Save(dataDir + "image_out.jpg");
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET

public static void ExtractImageFromStamp()
{
    // The path to the documents directory
    string dataDir = RunExamples.GetDataDir_AsposePdfFacades_StampsWatermarks();

    // Instantiate PdfContentEditor object
    using var pdfContentEditor = new Aspose.Pdf.Facades.PdfContentEditor();

    // Bind input PDF file
    pdfContentEditor.BindPdf(dataDir + "ExtractImage-ImageStamp.pdf");

    // Get Stamp info for the first stamp
    var infos = pdfContentEditor.GetStamps(1);

    // Get the image from Stamp Info
    var image = infos[0].Image;

    // Save the extracted image
    image.Save(dataDir + "image_out.jpg");
}

Change Position of a Stamp in a PDF file

PdfContentEditor class allows you to change the position of a stamp in a PDF file. First, you need to create an object of PdfContentEditor class and bind input PDF file using BindPdf method. After that, call MoveStamp method with stamp index and new position on a particular page of PDF file. Then, you can save the updated file using Save method. The following code snippet shows you how to move a stamp in a particular page.

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET

public static void ChangeStampPosition()
{
    // The path to the documents directory
    string dataDir = RunExamples.GetDataDir_AsposePdfFacades_StampsWatermarks();

    // Instantiate PdfContentEditor object
    using (var pdfContentEditor = new Aspose.Pdf.Facades.PdfContentEditor())
    {
        // Bind input PDF file
        pdfContentEditor.BindPdf(dataDir + "ChangeStampPosition.pdf");

        int pageId = 1;
        int stampIndex = 1;
        double x = 200;
        double y = 200;

        // Change the position of the stamp to new x and y position
        pdfContentEditor.MoveStamp(pageId, stampIndex, x, y);

        // Save the Pdf file
        pdfContentEditor.Save(dataDir + "ChangeStampPosition_out.pdf");
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET

public static void ChangeStampPosition()
{
    // The path to the documents directory
    string dataDir = RunExamples.GetDataDir_AsposePdfFacades_StampsWatermarks();

    // Instantiate PdfContentEditor object
    using var pdfContentEditor = new Aspose.Pdf.Facades.PdfContentEditor();

    // Bind input PDF file
    pdfContentEditor.BindPdf(dataDir + "ChangeStampPosition.pdf");

    int pageId = 1;
    int stampIndex = 1;
    double x = 200;
    double y = 200;

    // Change the position of the stamp to new x and y position
    pdfContentEditor.MoveStamp(pageId, stampIndex, x, y);

    // Save the Pdf file
    pdfContentEditor.Save(dataDir + "ChangeStampPosition_out.pdf");
}

Also, you can use MoveStampById method to move a specific stamp by using StampId.

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET

public static void MoveStampById()
{
    // The path to the documents directory
    string dataDir = RunExamples.GetDataDir_AsposePdfFacades_StampsWatermarks();

    // Instantiate PdfContentEditor Object
    using (var pdfContentEditor = new Aspose.Pdf.Facades.PdfContentEditor())
    {
        // Bind input PDF file
        pdfContentEditor.BindPdf(dataDir + "ChangeStampPosition.pdf");

        int pageId = 1;
        int stampId = 1;
        double x = 200;
        double y = 200;

        // Change the position of the stamp to new x and y position
        pdfContentEditor.MoveStamp(pageId, stampId, x, y);

        // Save the Pdf file
        pdfContentEditor.Save(dataDir + "ChangeStampPositionByID_out.pdf");
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET

public static void MoveStampById()
{
    // The path to the documents directory
    string dataDir = RunExamples.GetDataDir_AsposePdfFacades_StampsWatermarks();

    // Instantiate PdfContentEditor Object
    using var pdfContentEditor = new Aspose.Pdf.Facades.PdfContentEditor();

    // Bind input PDF file
    pdfContentEditor.BindPdf(dataDir + "ChangeStampPosition.pdf");

    int pageId = 1;
    int stampId = 1;
    double x = 200;
    double y = 200;

    // Change the position of the stamp to new x and y position
    pdfContentEditor.MoveStamp(pageId, stampId, x, y);

    // Save the Pdf file
    pdfContentEditor.Save(dataDir + "ChangeStampPositionByID_out.pdf");
}