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Reduce All Images Dimensions by percentage (Keep Aspect Ratio) in a WORD document

Aspose.Words Product Family
#1

Hi

I have Aspose Total .NET and Word v11.8

I have a word document with lots of images.

  1. I want to open a Word document in Aspose word.
  2. Then reduce EVERY image’s dimensions by a percentage while keeping aspect ratio.
  3. Save the document onto itself again.

Can you help?

#2

Hi Nitin,

Thanks for your inquiry. Please try using the following code snippet to be able to resize images in a Document:

public void TestResizeImages_100222()
{
    Document doc = new Document(@"307_100222_srinivasgoud\in.doc");
    // get shapes collection
    NodeCollection shapes = doc.GetChildNodes(NodeType.Shape, true, false);
    int imageIndex = 0;
    foreach (Shape shape in shapes)
    {
        if (shape.HasImage)
        {
            // generate image name
            string imageFileName = string.Format("image_{0}.{1}", imageIndex, shape.ImageData.ImageType);
            // get image
            MemoryStream stream = new MemoryStream(shape.ImageData.ImageBytes);
            Image img = Image.FromStream(stream);
            // resize image
            img = ResizeImage(img, 100, 100);
            // save image
            img.Save(@"307_100222_srinivasgoud" + imageFileName);
            imageIndex++;
        }
    }
}

/// 
/// Resize source image to specifed sze
/// 
/// Source image
/// Target width
/// Target height
/// Resized image
private Image ResizeImage(Image sourceImage, int targetWidth, int targetHeight)
{
    float ratioWidth = (float)sourceImage.Width / targetWidth;
    float ratioHeight = (float)sourceImage.Height / targetHeight;
    if (ratioWidth > ratioHeight)
        targetHeight = (int)(targetHeight * (ratioHeight / ratioWidth));
    else
    {
        if (ratioWidth < ratioHeight)
            targetWidth = (int)(targetWidth * (ratioWidth / ratioHeight));
    }
    Image outputImage = sourceImage.GetThumbnailImage(targetWidth, targetHeight, null, newIntPtr());
    return outputImage;
}

Also, please note that Images are represented by either Shape or by DrawingML nodes in Aspose.Words’ DOM. I would suggest you please read the following articles:

https://docs.aspose.com/words/net/working-with-graphic-elements/
https://docs.aspose.com/words/net/working-with-images/

I hope, this will help.

Best Regards,

#3

Thank you, I will try this code.

#4

I do not want to save the image out to a file.
I just want to resize the image inside the document.
so for example:
I have doc1.docx with an image of size H:1000 x W: 800
I want the final result to be
doc1.docx with the same image but now size H:500 x W:400
So i just want to end up with the same doc1.docx file but now with the image inside the document reduced by 50%.

#5

Hi Nitin,

Thanks for your inquiry. Please try using the following code snippet to be able to resize images in your Document:

Document doc = new Document(@"C:\Temp\in.doc");
NodeCollection shapes = doc.GetChildNodes(NodeType.Shape, true);
foreach (Shape shape in shapes)
{
    if (shape.HasImage)
    {
        MemoryStream stream = new MemoryStream(shape.ImageData.ImageBytes);
        Image img = Image.FromStream(stream);
        // resize image
        img = ResizeImage(img, 100, 100);
        shape.ImageData.SetImage(img);
        shape.Width = 100;
        shape.Height = 100;
    }
}
doc.Save(@"C:\Temp\out.doc");

private static Image ResizeImage(Image sourceImage, int targetWidth, int targetHeight)
{
    float ratioWidth = (float)sourceImage.Width / targetWidth;
    float ratioHeight = (float)sourceImage.Height / targetHeight;
    if (ratioWidth > ratioHeight)
        targetHeight = (int)(targetHeight * (ratioHeight / ratioWidth));
    else
    {
        if (ratioWidth < ratioHeight)
            targetWidth = (int)(targetWidth * (ratioWidth / ratioHeight));
    }
    Image outputImage = sourceImage.GetThumbnailImage(targetWidth, targetHeight, null, new IntPtr());
    return outputImage;
}

Best Regards,

#6

HI Awaisv,
Thank you - I will tes the code.

#7

Hi Nitin,

Sure, please let us know any time you have any further queries. We’re always glad to help you.

Best Regards,

#8

yes it works very well. I just tweaked it a little.