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Multipage TIFF to Jpeg Thumbnails

I am attempting to convert a multipage Tiff file to Jpeg thumbnails for each page. The following code gives me the correct number of thumbnails, but each is a thumbnail for the first page only.



using (TiffImage tiffImage = (TiffImage)Aspose.Imaging.Image.Load(fullFileName))

{

foreach (TiffFrame tiffFrame in tiffImage…Frames)

{

tiffImage.ActiveFrame = tiffFrame;



size = GetImageSize(tiffImage.Width, tiffImage.Height, thumbnailData);

tmpTNFilename = AsposeUtilities.GetThumbnailFullFileName(thumbnailData.WorkPath, filename, thumbnailData.MediaId, (fPage + 1), “”, extension);



tiffImage.Resize(size.Width, size.Height, ResizeType.NearestNeighbourResample);

tiffImage.Save(tmpTNFilename);



fPage++;

}

}

Hi Mike,


Thank you for contacting Aspose support.

Unfortunately, we are unable to evaluate the presented scenario while using your provided code snippet because it’s incomplete, lacking method definitions for GetThumbnailFullFileName & GetImageSize. Although you may use the below provided code snippet to achieve the same. Please amend the code snippet according to your desired results.

C#

//Create an instance of TiffImage and load an existing image
using (TiffImage multiImage = (TiffImage)Aspose.Imaging.Image.Load(myDir + “merged.tif”))
{
//Create an instance of int to keep track of frames in TiffImage
int frameCounter = 0;
//Iterate over the TiffFrames in TiffImage
foreach (TiffFrame tiffFrame in multiImage.Frames)
{
multiImage.ActiveFrame = tiffFrame;
//Load Pixels of TiffFrame into an array of Colors
Color[] pixels = multiImage.LoadPixels(tiffFrame.Bounds);
//Create an instance of JpegOptions
var jpgOptions = new Aspose.Imaging.ImageOptions.JpegOptions();
//Set the Source of JpegOptions as FileCreateSource by specifying the location where output will be saved
//Last boolean parameter denotes isTemporal
jpgOptions.Source = new FileCreateSource(string.Format("{0}\Thumb{1}.jpg", myDir, frameCounter), false);
//Create a new RasterImage of Jpeg type
using (var jpgImage = (RasterImage)Image.Create(jpgOptions, tiffFrame.Width, tiffFrame.Height))
{
//Save the JpegImage with pixels from TiffFrame
jpgImage.SavePixels(tiffFrame.Bounds, pixels);
//Resize the Jpeg Image
jpgImage.Resize(100, 100, ResizeType.NearestNeighbourResample);
//Save the results on disk
jpgImage.Save();
}
frameCounter++;
}
}

Note: The above code requires setting a valid license before instantiating any object from Aspose.Imaging API, otherwise you will experience NullReferenceException on below statement.

C#
jpgImage.SavePixels(tiffFrame.Bounds, pixels);

Please feel free to write back in case you need our further assistance.