从包含图像的PDF（Abby，microsoft，google）读取文本时在UIPATH中执行OCR时出错

Question

我想从包含我正在使用UIPath的Image的PDF中提取文本。我已经尝试过Abby，microsoft和google OCR引擎但是在所有这些引擎中都遇到了相同的错误。以下是错误堆栈跟踪： -

ExtractMail has thrown an exception

Source: Abbyy OCR

Message: Error performing OCR: AbbyyErrorLoadEngine

Exception Type: Exception

System.Exception: Error performing OCR: AbbyyErrorLoadEngine

Server stack trace: 
   at UiPath.Vision.VisionClient.ScrapeUsingHostService(OCRInput input, OCROptions options, CancellationToken cancelToken)
   at UiPath.Vision.VisionClient.ScrapeImage(OCRInput input, OCROptions options, CancellationToken cancelToken, Boolean useHostProcess)
   at UiPath.Vision.VisionClient.Scrape(OCRInput input, OCROptions options, CancellationToken cancelToken, Boolean useHostProcess)
   at UiPath.Vision.UiImage.ScrapeOCR(OCROptions options, CancellationToken cancellationToken)
   at UiPath.Core.Activities.OCREngineActivity.<>c__DisplayClass36_0.<BeginExecute>b__0()
   at System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[] args, Object server, Object[]& outArgs)
   at System.Runtime.Remoting.Messaging.StackBuilderSink.AsyncProcessMessage(IMessage msg, IMessageSink replySink)

Exception rethrown at [0]: 
   at System.Runtime.Remoting.Proxies.RealProxy.EndInvokeHelper(Message reqMsg, Boolean bProxyCase)
   at System.Runtime.Remoting.Proxies.RemotingProxy.Invoke(Object NotUsed, MessageData& msgData)
   at System.Func`1.EndInvoke(IAsyncResult result)
   at UiPath.Core.Activities.OCREngineActivity.EndExecute(AsyncCodeActivityContext context, IAsyncResult result)
   at System.Activities.AsyncCodeActivity`1.System.Activities.IAsyncCodeActivity.FinishExecution(AsyncCodeActivityContext context, IAsyncResult result)
   at System.Activities.AsyncCodeActivity.CompleteAsyncCodeActivityData.CompleteAsyncCodeActivityWorkItem.Execute(ActivityExecutor executor, BookmarkManager bookmarkManager)

Answer 1

可能是你在执行UiPath.Vision.Host32.exe时遇到问题（在18.2+中它位于C:\Users\<username>\.nuget\packages\uipath.vision\<version number>\build\UiPath.Vision.Host32.exe）。它可能被AV软件或组策略阻止。尝试检查Process Explorer，看看你是否会得到任何有关正在发生的事情的提示。