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The text in the generated word document from an image file looks blurry

Hi,

My requirement is to split an input image which is very large into multiple small image files,
which are later inserted into a word document and then converted to pdf file.

I am using the following code which was mentioned as shown in the url:

<a href=“https://forum.aspose.com/t/31110

The code I am using is as follows:

protected void Button1_Click(object sender, EventArgs e)
{
Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);
string TempDirectoryPath = @“D:\Aspose\RDP\NEWFiles”;
string inputFileName=TempDirectoryPath + “\ImagePDF.png”;
Aspose.Words.Drawing.Shape shape = builder.InsertImage(System.Drawing.Image.FromFile(inputFileName),
RelativeHorizontalPosition.Page, // Insert the image floating at the top left of the page.
0,
RelativeVerticalPosition.Page,
0,
doc.FirstSection.PageSetup.PageWidth, // Make the image fit the page width.
doc.FirstSection.PageSetup.PageHeight, // The height doesn’t matter as we will split the image into separate parts.
WrapType.None);

GC.Collect();
GC.WaitForPendingFinalizers();
doc.Accept(new LargeImageSplitter());
doc.Save(TempDirectoryPath + “ImageDOC.doc”, SaveFormat.Doc);
doc.Accept(new LargeImageSplitter());
doc.Save(TempDirectoryPath + “ImageDOC.doc”, SaveFormat.Doc); //Step 1: Split the single larege image file into multiple images and save into a word document

//Step 2: generate the individual image files from the above word document
for (int pageCounter = 0, stop = doc.PageCount; pageCounter < stop; pageCounter++)
{
Aspose.Words.Saving.ImageSaveOptions options = new Aspose.Words.Saving.ImageSaveOptions(SaveFormat.Png);
options.PageIndex = pageCounter;
options.PrettyFormat = true;
// images are of the format <file><0-padded-page-index>.png, e.g. (somepath\myfile02.png)
doc.Save(string.Format(”{0}{1}{2}{3:d2}.png", imageDirectory, “”, “Image”, pageCounter + 1), options);
}

//Step 3: save the above image files in a PDF file
Aspose.Pdf.Generator.Pdf pdf = new Aspose.Pdf.Generator.Pdf();
string[] fileEntries = Directory.GetFiles(imageDirectory, “*.png”);

int length = fileEntries.GetLength(0);
int counter;

for (counter = 0; counter < length; counter++)
{
// Create a section object
Aspose.Pdf.Generator.Section section1 = pdf.Sections.Add();
// creat an image object
section1.PageInfo.PageWidth = Aspose.Pdf.Generator.PageSize.A4Width;
section1.PageInfo.PageHeight = Aspose.Pdf.Generator.PageSize.A4Height;

section1.PageInfo.Margin.Top = 50;
section1.PageInfo.Margin.Left = 20;
section1.PageInfo.Margin.Bottom = 20;
section1.PageInfo.Margin.Right = 35;

Aspose.Pdf.Generator.Image image1 = new Aspose.Pdf.Generator.Image(section1);
image1.ImageInfo.File = fileEntries[counter];
image1.ImageInfo.ImageFileType = Aspose.Pdf.Generator.ImageFileType.Png;
image1.ImageInfo.Alignment = Aspose.Pdf.Generator.AlignmentType.Center;

image1.ImageInfo.FixHeight = section1.PageInfo.PageHeight - section1.PageInfo.Margin.Top - section1.PageInfo.Margin.Bottom;
// specify the image Width information eqaul to Section Width minus Left and Right margin of page
image1.ImageInfo.FixWidth = section1.PageInfo.PageWidth - section1.PageInfo.Margin.Left - section1.PageInfo.Margin.Right;

section1.IsLandscape = false;
section1.Paragraphs.Add(image1);
}
pdf.Save(outputFileName);
}

The image splitting logic is as follows:

public class LargeImageSplitter : DocumentVisitor
{
public override VisitorAction VisitShapeStart(Aspose.Words.Drawing.Shape shape)
{
if (shape.HasImage)
SplitImage(shape, shape.ParentParagraph.ParentSection.PageSetup);

return VisitorAction.Continue;
}

private static System.Drawing.Image CropImage(System.Drawing.Image img, System.Drawing.Rectangle cropArea)
{
try
{
Bitmap bmpImage = new Bitmap(img);
Bitmap bmpCrop = bmpImage.Clone(cropArea, bmpImage.PixelFormat);
return (System.Drawing.Image)(bmpCrop);
}
catch (Exception ex)
{
throw ex;
}

}
private void SplitImage(Aspose.Words.Drawing.Shape shape, Aspose.Words.PageSetup pageSetup)
{
try
{
// Store the original height of shape.
double origHeight = shape.ImageData.ImageSize.HeightPoints;
double currentHeight = origHeight;

// Get the avaliable height on the page.
//double pageHeight = pageSetup.PageHeight - (pageSetup.TopMargin + pageSetup.BottomMargin);
double pageHeight = pageSetup.PageHeight;

// If the height of this shape is bigger than the page then split it.
if (currentHeight > pageHeight)
{
// At what ratio of the shape does it cut off at the end of the page. e.g 0.5 if half of the image is on the first page, the other half in the second.
double ratio = pageHeight / currentHeight;

// Create a new bitmap from the image data.
Bitmap bitmap = new Bitmap(shape.ImageData.ToImage());

// Find the pixel height point where the image is to be cut. Ratio needs to be used in this case as the shape height is in points while
// the bitmap is in pixels.
int heightToCrop = (int)(bitmap.Height * ratio);

// Define which section of the original image should be used for the new shape on the next page. This is all
// of the image which is cut off at the end of the page.
System.Drawing.Rectangle cropRect = new System.Drawing.Rectangle(0, heightToCrop, bitmap.Width, bitmap.Height - heightToCrop);

// Crop the image at this point, create a clone of the original shape and insert it
System.Drawing.Image croppedImage = CropImage(bitmap, cropRect);
Aspose.Words.Drawing.Shape newShape = (Aspose.Words.Drawing.Shape)shape.Clone(true);
newShape.ImageData.SetImage((System.Drawing.Image)croppedImage);

// Repeat the process but this time for the original image on the preceeding page. Crop this to the point where the page ends.
bitmap = new Bitmap(shape.ImageData.ToImage());

heightToCrop = (int)(bitmap.Height * ratio);
cropRect = new System.Drawing.Rectangle(0, 0, bitmap.Width, heightToCrop);

GC.Collect();
GC.WaitForPendingFinalizers();

System.Drawing.Image topCroppedImage = CropImage(bitmap, cropRect);
shape.ImageData.SetImage((System.Drawing.Image)topCroppedImage);

// The height of the original shape should now be the page height.
shape.Height = pageHeight;

// The shape on the next page should be the difference of the original height and what the original shape is now.
newShape.Height = origHeight - shape.Height;

// Create a new paragraph aftr the parent paragraph of the original shape and insert the new shape into it.
// This new image should automatically be pushed to the next page.
Aspose.Words.Paragraph parentPara = shape.ParentParagraph;
Aspose.Words.Paragraph newPara = new Aspose.Words.Paragraph(shape.Document);
newPara.AppendChild(newShape);

GC.Collect();
GC.WaitForPendingFinalizers();

parentPara.ParentNode.InsertAfter(newPara, parentPara);



// If the original image is not inline then we need to separate the images with a section break.
if (!shape.IsInline)
parentPara.AppendChild(new Run(shape.Document, ControlChar.SectionBreak));

// Visit the new shape.
VisitShapeStart(newShape);
}
}
catch (Exception ex)
{
throw ex;
}
}
}


Now the problem is that the text in the generated pdf looks blurry.

Please see the attached files:

What I observed is that in the above code in the step 1 while splitting the single large image file and inserting into the workd document it self has the text as blurry.
(Step 1: Split the single large image file into multiple images and save into a word document)
Please see the attached word document “ImageDOC.doc” .


Can you please look into this issue and let me know how to resolve this issue.

Please let me know if you need more information.


Thanks,
Siddi.






Hi Siddi,


Thanks for your inquiry.

I think, you should simply use the following code to achieve what you’re looking for. Please upgrade to the latest version of Aspose.Words (13.6.0) from here. The latest version of Aspose.Words automatically splits your large image into multiple pages in output Word/PDF documents:

Document doc = new
Document(@“C:\Temp\ImageDOC.doc”);

DocumentBuilder builder = new DocumentBuilder(doc);

Shape shape = builder.InsertImage(Image.FromFile(@"C:\Temp\ImagePDF.png"),

RelativeHorizontalPosition.Page, // Insert the image floating at the top left of the page.

0,

RelativeVerticalPosition.Page,

0,

doc.FirstSection.PageSetup.PageWidth, // Make the image fit the page width.

-1, // The height doesn't matter as we will split the image into separate parts.

WrapType.None);

doc.Save(@"C:\Temp\out.pdf");


I hope, this helps.

Best regards,

Hi Hafeez,

I tried with the above code and with the latest Aspose.Word.dll (13.6.0).
But this is not working as expected .
The image is inserted into the output pdf as a single image…with very small size.
and the image was not split into multiple pages.

At the following line it threw a file not found exception…

Document doc = new Document(@“C:\Temp\ImageDOC.doc”);

So created an empty new word document and named it imageDoc.doc in the folder c:\temp

This solution is not working as expected.
Please see the attached out put files.
Please look into this and let me know if you need more information.


Thanks,
Siddi.

Hi Siddi,


Thanks for the additional information. I am working over your query and will get back to you soon.

Best regards,

Hi Hafeez,

Is there any update on this issue?

Thanks,
Siddi.

Hi Aspose Team,

Can you please tell me whether there is any update?

Thanks,
Siddi.

Hi Siddi,


Thank you for being patient. I am now checking your scenario, so please expect a reply shortly.

Best regards,

Hi Siddi,


I tested the code you mentioned in your first post with Aspose.Words 13.6.0; but, it is throwing an OutOfMemoryException over Windows7 machine on my side. Please create a simple application (for example a Console Application Project) that helps me reproduce the same problem on my side and attach it here for testing. Also, please share the environment details of your machine you’re getting this problem on (e.g. OS version, .NET Framework version etc). As soon as you get these pieces of information to us we’ll start our investigation into your issue. Thanks for your cooperation.

Best regards,