Java: org.opencv.highgui.Highgui.imread_0 (OpenCV UnsatisfiedLinkError)

Question

我试图在servlet中使用OpenCV，但每次运行servlet时都会弹出这个错误。下面是相同的堆栈跟踪：

SEVERE: Servlet.service() for servlet [com.patternrecognition.preprocessing.Preprocessing] in context with path     **[/ImagePreprocessing] threw exception [Servlet execution threw an exception] with root cause
java.lang.UnsatisfiedLinkError: org.opencv.highgui.Highgui.imread_0(Ljava/lang/String;I)J
at org.opencv.highgui.Highgui.imread_0(Native Method)
at org.opencv.highgui.Highgui.imread(Highgui.java:309)**
at com.patternrecognition.preprocessing.Preprocessing.smooth(Preprocessing.java:168)
at com.patternrecognition.preprocessing.Preprocessing.startPreprocessing(Preprocessing.java:56)
at com.patternrecognition.preprocessing.Preprocessing.doGet(Preprocessing.java:46)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:315)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)

我的项目时间不多了。请帮帮忙。

Answer 1

我通过使用"imread“方法读取的图像的绝对路径解决了这个问题。因为它是一个web项目，所以它没有采用默认项目文件夹的相对路径。

我在做：

Highgui.imread("img_perspective.png", Highgui.CV_LOAD_IMAGE_GRAYSCALE);

我将其更改为：

Highgui.imread("C:/Users/ImagePreprocessing/WebContent/WEB-INF/img_perspective.png", Highgui.CV_LOAD_IMAGE_GRAYSCALE);

希望能有所帮助。

Answer 2

您不满意的链接错误很可能是由于服务器不了解适当的共享对象在文件系统中的位置所致。

您需要使opencv jar、opencv java共享对象和opencv共享库可用于JVM。

这取决于您的容器和操作系统。

您可能希望查看设置"java.library.path“或LD_LIBRARY_PATH。