Is there any possibility to do overlay on pdf file that contains image?
5 Replies
My poblem is bit different.
Lets say I have one pdf document which contains images in that pdf we cant seatch text right that is pdf behavior.
Snippet:
Now I used AzureComputerVision to get the text of image. The analyaz text of computer will look like below
Snippet:
Now I have to get this text from this json and append on top of the my pdf character so that pdf ll look similar but we are able to search the text now.
Sample below
I tried to achive this functionality but its not overlaying on top of the character could you please help me on this.
Sample Code below.
//Method 1
private async Task<string> ProcessForTextOverlayAsync1(PdfModel pdfModel, CancellationTokenSource cancellationTokenSource)
{
pdfModel.LasteOverlayPage = 0;
string pdfDocName = $"{pdfModel.DocumentId}-{pdfModel.DocumentDetailsId}";
byte[] sourceFile = System.IO.File.ReadAllBytes($"D:/Files/SyncFusionTest/PdfImage1Page_test.pdf");
Stream stream = new MemoryStream(sourceFile);
using (PdfLoadedDocument pdfDoc = new(stream))
{
foreach (string blobName in pdfModel.AnalyzeResultBlobNames)
{
await ProcessForOverlayAsync(pdfModel, pdfDoc, blobName);
}
await Save(pdfDoc, pdfDocName, cancellationTokenSource.Token);
}
return "";
}
//Method 2
public async Task ProcessForOverlayAsync(PdfModel pdfModel, PdfLoadedDocument pdfDoc, string blobName)
{
try
{
ReadOperationResult readResult = await DownloadFromStorageAsync<ReadOperationResult>("");
int pageCount = pdfDoc.Pages.Count;
foreach (ReadResult page in readResult.AnalyzeResult.ReadResults)
{
PdfPageBase pdfPage = pdfDoc.Pages[pdfModel.LasteOverlayPage + page.Page - 1];
if (pdfPage != null)
{
double pageHeight = pdfPage.Size.Height; // Get the height of the page
page.Height = GetPageHeight(pdfModel.HasDefaultTextEnabled, page.Height, pageHeight);
PdfGraphics graphics = pdfPage.Graphics;
foreach (Line line in page.Lines)
{
// Choose a suitable font (e.g., PdfStandardFont) or load a custom font from a file
PdfFont font = new PdfStandardFont(PdfFontFamily.Helvetica, 12); // Example with a standard font
// If you have custom fonts, load them from file like this:
// PdfFont font = new PdfTrueTypeFont(new Font("Arial", 12), true);
// Use RGB color for PdfSolidBrush
PdfBrush brush = null;
if (pdfModel.HasDefaultTextEnabled)
{
brush = new PdfSolidBrush(new PdfColor(0, 0, 255)); // RGB color
}
else
{
brush = new PdfSolidBrush(new PdfColor(0, 0, 0)); // Black color
}
// Calculate the starting point to position text above existing text
PointF startPoint = new PointF((float)line.BoundingBox[0], (float)(line.BoundingBox[1])); // Adjust Y-coordinate
graphics.DrawString(line.Text, font, brush, startPoint);
}
}
}
pdfModel.LasteOverlayPage += readResult.AnalyzeResult.ReadResults.Count;
response.Status = "Success";
}
catch (Exception ex)
{
throw;
}
}
Please help me on this?
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