Merge images

Aspose.PDF 21.4 allows you to combine Images. Merge Images method checks the contents of a specific folder and works with the specified type of files in it. When working with merging pictures, we specify ‘inputImagesStreams’, Image Format and Image Merge Mode (as example - vertical) of our file. Then we save our result in FileOutputStream.

Follow the next code snippet for resolve your task:

Merge Images

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void MergeImages01()
{
    var dataDir = RunExamples.GetDataDir_AsposePdf_Images();  // Updated to use dynamic path
    // Get all image files matching the pattern "MergeImages*.jpg"
    var fileStreams = Directory.GetFiles(dataDir, "MergeImages*.jpg")
                                .OrderBy(f => f)
                                .Select(f => File.OpenRead(f))
                                .Cast<Stream>()
                                .ToList();

    using (Stream inputStream = Aspose.Pdf.Facades.PdfConverter.MergeImages(fileStreams, Aspose.Pdf.Drawing.ImageFormat.Jpeg, ImageMergeMode.Vertical, 1, 1))
    using (FileStream outputStream = new FileStream(dataDir + "MergeImages_out.jpg", FileMode.Create))
    {
        // Copy merged images to the output file
        inputStream.CopyTo(outputStream);
    }
}

The second example works the same as the previous one, but the merged images will be saved horizontally.

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void MergeImages02()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Images();

    // Get all image files matching the pattern "MergeImages*.jpg"
    var fileStreams = Directory.GetFiles(dataDir, "MergeImages*.jpg")
                            .OrderBy(f => f)
                            .Select(f => File.OpenRead(f))
                            .Cast<Stream>()
                            .ToList();

    using (Stream inputStream =
            Aspose.Pdf.Facades.PdfConverter.MergeImages(fileStreams, Aspose.Pdf.Drawing.ImageFormat.Jpeg, ImageMergeMode.Horizontal, 1, 1))
    using (FileStream outputStream = new FileStream(dataDir + "MergeImages02_out.jpg", FileMode.Create))
    {
        // Copy merged images to the output file
        inputStream.CopyTo(outputStream);
    }
}

In the third example, we will merge the pictures by centering them. Two horizontally, two vertically.

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void MergeImages03()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Images();

    // Get all image files matching the pattern "MergeImages*.jpg"
    var fileStreams = Directory.GetFiles(dataDir, "MergeImages*.jpg")
                            .OrderBy(f => f)
                            .Select(f => File.OpenRead(f))
                            .Cast<Stream>()
                            .ToList();

    using (Stream inputStream =
            Aspose.Pdf.Facades.PdfConverter.MergeImages(fileStreams, Aspose.Pdf.Drawing.ImageFormat.Jpeg, ImageMergeMode.Center, 2, 2))
    using (FileStream outputStream = new FileStream(dataDir + "MergeImages03_out.jpg", FileMode.Create))
    {
        // Copy merged images to the output file
        inputStream.CopyTo(outputStream);
    }
}

Also, Aspose.PDF for Java present you the opportunity to combine pictures and save them in the Tiff format, using MergeImagesAsTiff Method.

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void MergeImages04()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Images();

    // Get all image files matching the pattern "MergeImages*.jpg"
    var fileStreams = Directory.GetFiles(dataDir, "MergeImages*.jpg")
                            .OrderBy(f => f)
                            .Select(f => File.OpenRead(f))
                            .Cast<Stream>()
                            .ToList();

    using (Stream inputStream =
            Aspose.Pdf.Facades.PdfConverter.MergeImagesAsTiff(fileStreams))
    using (FileStream outputStream = new FileStream(dataDir + "MergeImages_out.tiff", FileMode.Create))
    {
        // Copy merged images to the output file
        inputStream.CopyTo(outputStream);
    }
}

To save the merged images as one image on PDF page, we place them in the imageStream, place the result on the page with addImage method, where we specify the coordinates where we want to place them.

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void MergeImages05()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_Images();

    // Get all image files matching the pattern "MergeImages*.jpg"
    var fileStreams = Directory.GetFiles(dataDir, "MergeImages*.jpg")
                                .OrderBy(f => f)
                                .Select(f => File.OpenRead(f))
                                .Cast<Stream>()
                                .ToList();

    using (Stream inputStream =
            Aspose.Pdf.Facades.PdfConverter.MergeImages(fileStreams, Aspose.Pdf.Drawing.ImageFormat.Jpeg, ImageMergeMode.Vertical, 1, 1))
    using (MemoryStream outputStream = new MemoryStream())  // Output to MemoryStream
    {
        // Copy merged images to the MemoryStream
        inputStream.CopyTo(outputStream);

        // Create PDF document
        using (var document = new Aspose.Pdf.Document())
        {
            // Add page
            var page = document.Pages.Add();

            // Add the image from the MemoryStream to the page
            page.AddImage(outputStream, new Aspose.Pdf.Rectangle(10, 120, 400, 720));

            // Save PDF document
            document.Save(dataDir + "MergeImages_out.pdf");
        }
    }
}