Hi, not sure if this is a DotAnnotate or a DotImage question. I'm creating a PDF Document viewer based on the Atalasoft.Imaging.WinControls.DocumentViewer control. I've added a search box so a user can search through the text, but I need to add 2 types of highlighting to the viewer and am struggling to do it. Firstly, when a user enters ...

I use the following code to convert a PDF to a TIF image. This works fine for the majority of the files -- however, ocassionally, one of the TIFs will be returned as completely black. Any idea what is going on?   Dim pdf As PdfDecoder = New PdfDecoder() pdf.Resolution = 150 RegisteredDecoders.Decoders.Add(pdf) Dim myWorkspace As ...

I need a little claification on pdfs. We work will 1bit scanned images and our customers want pdfs Converting back and forth between the formats, gray scale and black and white, the images get blurry so we think creating/extracting might be the way to go. 1) will singleimage=true if the pdf page is a single image AND contains ocr info? 2) does ...

I am using the folderThumbnailView control in my app and I also have the Atalasoft PDFRasterizer - my question is: how can I make the thumbnailviewer show PDF images - I have added the .pdf extension to the filter property but still no joy. Please help. Thankyou.

Try increasing the resololution in the PdfDecoder object.  The blur might be from rasterizing it at a lower resolution, then zooming in.

DotImage PDFRasterizer will extract the embedded image and resample the image based on the requested resolution when singleimage=true.  If the original image was bitonal, the result when rasterizing is likely to be grayscale due to resampling.  Depending on what you need, you might want to extract the image yourself when ...

I was trying to decode a bunch of pdf's into multi page Tiffs using DotImage 4.0h and the PDF rasteriser add-on, basically using code from this article (http://www.atalasoft.com/kb/article.aspx?id=10125&cNode=). It works great for over 80% of my sample pdfs, however there are a few which throw a 'DestSize must be greater than 0' exception on ...

The PdfViewer demo available in both C# and VB.NET shows you how to use it.  This is code from the object reference in the documentation.  Once you add the decoder to the registered decoders you can open a PDF as you would any other image. using Atalasoft.Imaging; using Atalasoft.Imaging.Codec; using Atalasoft.Imaging.Codec.Pdf; ... ...

I got the following reply (underline) from your sales rep. In order to get an Image only PDF into DotImage you need the PDFRasterizer. Then the Image can be put into OCR to create Searchable PDF. I couldn't find any PDFRasterizer demo or sample code. Can you give me the directions? My goal is to convert from an image only PDF file ...

No, it is not.  It is possible to rasterize a PDF to a 32-bit RGBA, 24-bit RGB, or 8-bit GRAY image, but not CMYK.  Sorry