How to Convert PDF Files to Print Quality Images
How to Convert PDF Files to Print Quality Images
As a software developer, I have met many friends in my work because they can't convert pdf files to images/pictures, which causes the graphics of the manuscript to be blurred. The graphics staff of the publishing house has to redraw and proofread. This adds a lot of problems and is easy to give rise to new errors.
For the authors of many books, many images/pictures in the books are from the PDF file provided by the original factory. Usually, the most commonly used method that people think of most directly is to use the cropping tool in Adobe Acrobat to intercept the graphics, but the actual effect is the loss of picture pixels, and it is very unclear.
Most books are in black and white and it is best to use tif graphics. This article introduces the method of converting pdf to tif black and white images. Take a 3-page file "original.pdf" as an example. Extract each page of the PDF file separately before conversion, otherwise, the three-page PDF file will be converted into a whole image/picture in the following conversion steps.
Many people will choose this type of third-party software, the operation is roughly the same. And the steps are as follows.
1. Open the pdf file and run the menu command "Edit" → "Preferences".
2. Bring up the "Preferences" dialog box, and select "Type" → "Convert from PDF" → "TIFF".
3. In the "Save as TIFF Settings" dialog box, change the DIP and set it to 600dpi.
4. Execute the menu command "File" → "Export" → "Image" → "TIFF".
5. At this time, you will see 3 tif files in the directory where "original.pdf" is located, that is, 1 page is converted to 1 picture. This is why I mentioned earlier that it is best to extract each page of the PDF file separately.
6. Use Photoshop software to adjust cropping and grayscale. After setting, execute the menu command "File" → "Save As", and the "Save As" dialog box will pop up. In the dialog box, select the "Format" drop-down list. "TIFF(*.TIF)", and then in the pop-up "TIFF Options" dialog box, because most book software runs on the Intel architecture PC platform, select the "IBM PC(I)" option here. Of course, you can also select "Macintosh" as needed. Finally, black-and-white, 600dpi graphics that meet the printing requirements are generated.
The above process of converting PDF to image/picture may seem simple, but it also has its shortcomings. Because many people don't use Photoshop well. Post adjustment is very troublesome. And if the number of PDFs is large, or a PDF has a large number of pages, the batch operation will become very slow and inefficient. Therefore, we also provide a .NET PDF to image converter dll that can be used by .NET developers or programmers to convert pdf into images/pictures.
.NET programmers can include CnetSDK.PDFtoImage.Converter.dll to their own projects, simply design the interface, and then generate a desktop program that converts pdf to pictures/images. It is easy to use, simple, and efficient. If you need print-level image quality, you can flexibly set the output size, DPI, etc. before the image is converted.
The trial version is also available for download on our official website. In the meanwhile, there is a demo to test and use, as well as detailed operating instructions to give you the most intuitive experience. Friends who like it can purchase the official version of CnetSDK.PDFtoImage.Converter.dll.
