Technical FAQs

Why do I get a “File Format Unrecognized” exception when trying to load a PDF document in ImageGear .NET?

You will need to set up your project to include PDF support if you want to work with PDF documents. Add a reference to ImageGear24.Formats.Pdf (if you’re using another version of ImageGear, make sure you’re adding the correct reference). Add the following line of code where you specify other resources:

using ImageGear.Formats.PDF;

Add the following lines of code before you begin working with PDFs:

ImGearFileFormats.Filters.Insert(0, ImGearPDF.CreatePDFFormat());
ImGearPDF.Initialize();

The documentation page linked here shows how to add PDF support to a project.

My document has Asian characters (CJK, etc.), which are not displaying correctly in PrizmDoc Viewer; what steps can I take to view them?

In some cases, the reason is due to the fonts not being installed on the operating system. We have outlined some commands to install fonts for select operating systems below:

In CentOS 6 do:

yum groupinstall "Chinese Support"
yum groupinstall "Japanese Support"
yum groupinstall "Korean Support"
yum groupinstall "Kannada Support"
yum groupinstall "Hindi Support"

In CentOS 7 do:

yum groupinstall "fonts"

In Ubuntu do:

sudo apt-get install language-pack-ja
sudo apt-get install japan*
sudo apt-get install language-pack-zh*
sudo apt-get install chinese*
sudo apt-get install language-pack-ko
sudo apt-get install korean*
sudo apt-get install fonts-arphic-ukai fonts-arphic-uming fonts-ipafont-mincho fonts-ipafont-gothic fonts-unfonts-core

How do I get Viewing Packages working in PrizmDoc?

Viewing Package Full Setup Instructions

We recommend pre-converting documents through a feature called viewing packages and it can be turned on in PAS Configuration.

viewingPackages – default: disabled – Enable Pre-Conversion Services and APIs, which allow you to pre-convert documents and cache on-demand document views in PAS, to improve the speed at which documents can be viewed, as well as reduce the processing time in PrizmDoc Server for repeat document views.

Enable Viewing Packages Feature

feature.viewingPackages: enabled

Since viewing packages also use a database you will need to create a database for PAS, configure a database, and run the scripts that are included to create the tables necessary for viewing packages to work.

Configuring Database

• Create a database for PAS
• Configure the database

Install Microsoft SQL Express

Note 1: If you have Visual Studio installed, you might have to uninstall the recent versions of C++ that are installed before MSSQL Express will successfully install.

Remove Visual Studio C++ Redistributables

Note 2: When installing, use all default install settings except for setting a custom database instance id and set mixed mode authentication so a custom password can be set.

Turn On TCP/IP For Database Instance

Step 1:

Step 2:

Set Port 1433 for TCP/IP Connection

Restart SQL Express Instance

Right-click and select "Restart" or double-click and select "Restart".

Install Microsoft SQL Management Studio

Install from this downloads page

Connect To Database Instance In Microsoft SQL Management Studio

Create A Database In Microsoft SQL Management Studio

PAS Config Database Settings

feature.viewingPackages: "enabled"

database.adapter: "sqlserver"
database.host: "localhost"
database.port: 1433
database.user: "sa"
database.password: "Password1"
database.database: "prizmdb"


# Default timeout for the duration of a viewing session

defaults.viewingSessionTimeout: "20m"

viewingPackagesData.storage: "database"
viewingPackagesProcesses.storage: "database"
viewingSessionsData.storage: "database"
viewingSessionsProcessesMetadata.storage: "database"

viewingPackagesArtifactsMetadata.storage: "database"
viewingPackagesArtifacts.storage: "filesystem"
viewingPackagesArtifacts.path: "%ALLUSERSPROFILE%\\Accusoft\\Prizm\\ViewingPackages"

Create the database tables

Restart PAS

Create Viewing Package

Get State of Viewing Package Creator Processing

Get Viewing Package Info With Document Id

Create Viewing Session From Viewing Package With Document Id

View Document In Viewing Package With The Created Viewing Session Id

For examples of creating viewing packages, click on the link below to see the various ways of using them:

Viewing Package Creators

Where can I find the documentation for Accusoft PDF Viewer?

Our product documentation is located here.

What browsers are supported by Accusoft PDF Viewer?

• Windows: All chromium based browsers such as Microsoft Edge and Google Chrome.
• Mac: Safari
• iOS: Native Safari Browser
• Android: Native Chrome Browser

When should I apply image cleanup operations on my document images?

There are a number of cleanup operations that you can use to make an image more suitable for a particular application. What you observe visually on the image and how you perceive its impact on your project is the most important. For example, if you’re noticing very many random specks on your image, and you’re planning to use OCR, then you may want to try a depseckle or blob removal operation first. If the content in your image looks a bit slanted, you could try a deskew or rotate operation. In some cases, using a line removal operation on forms that have grid fields could be helpful also. The amount of image cleaning you may need to do can very from project to project. There’s not a one shot cleaning operation that will always work for all images. But, observe the nature of the noise and interference in your images to determine what general parameters appear to provide the best results.

Some of our users using Google Chrome have been reporting that PDF document loading and page rendering is extraordinarily slow. This is making the workflow unusable. What could have caused this issue to start occurring?

An issue was discovered in Google Chrome 71 that was causing this issue. The issue was resolved in Google Chrome 72 (released in Jan 2019).

If you are experiencing this PDF loading issue with PrizmDoc, and you are using the Google Chrome browser, please verify that you are using the latest stable version here:
https://www.google.com/chrome/

By default, in the PrizmDoc Viewer, links are highlighted and underlined in blue. To follow links within a document, the user needs to click the link, wait for the floating popup to appear showing the link’s target URL, and then click that to actually follow the link. Is there a way to make this a single-click process and skip the floating popup?

The desired one-click functionality can be achieved by modifying the viewer.js source file:

Inspect around line ~9457; you’ll find the following else if block:

    } else if (ev.targetType === "documentHyperlink") {
        hyperlinkMenuHandler(ev, "view");
    }

This line of code executes when the user clicks on a link displayed within the Viewer. The call to hyperlinkMenuHandler is responsible for displaying the floating popup. If you’d like to immediately open the link in a new window/tab instead, replace the contents of the “if else” block with a call to window.open:

    } else if (ev.targetType === "documentHyperlink") {
        window.open(ev.hyperlink.href, '_blank');
    }

This will allow hyperlinks that appear in the Viewer to be followed in a new window/tab with a single-click.

Why do I get a “File Format Unrecognized” exception when trying to load a PDF document in ImageGear .NET?

You will need to set up your project to include PDF support if you want to work with PDF documents. Add a reference to ImageGear24.Formats.Pdf (if you’re using another version of ImageGear, make sure you’re adding the correct reference). Add the following line of code where you specify other resources:

using ImageGear.Formats.PDF;

Add the following lines of code before you begin working with PDFs:

ImGearFileFormats.Filters.Insert(0, ImGearPDF.CreatePDFFormat());
ImGearPDF.Initialize();

The documentation page linked here shows how to add PDF support to a project.