opencv_imgproc342 in java.library.path after update to the new version

[hurschler]

Hi

I use opencv 3.4.2 as a part of dl4j.
Now after my update I got this error:

Caused by: java.lang.UnsatisfiedLinkError: no opencv_imgproc342 in java.library.path

at org.bytedeco.javacpp.Loader.load(Loader.java:882)
at org.bytedeco.javacpp.helper.opencv_core$AbstractArray.<clinit>(opencv_core.java:109)
at org.datavec.image.loader.NativeImageLoader.streamToMat(NativeImageLoader.java:256)
at org.datavec.image.loader.NativeImageLoader.asMatrix(NativeImageLoader.java:227)
at org.datavec.image.loader.NativeImageLoader.asMatrix(NativeImageLoader.java:221)

Thanks
André

[vonnieda]

Hi @hurschler, are you sure that you are using org.openpnp.opencv and not another package? This package does not use bytedeco.javacpp and I don't see any references to this package in your repo: https://github.com/deeplearning4j/deeplearning4j/search?utf8=%E2%9C%93&q=openpnp&type=

Thanks,
Jason

[hurschler]

In the Code that I use is a NativeImageLoader Class (org.datavec.image.loader.NativeImageLoader). And this Class create another Class new Mat() -> org.bytedeco.javacpp.opencv_core. The static initialization process try to load a native lib. And I think its a part of opencv wich is not found (opencv_core$AbstractArray.(opencv_core.java:109)).

Exception in thread "main" java.lang.UnsatisfiedLinkError: no jniopencv_core in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1864)
at java.lang.Runtime.loadLibrary0(Runtime.java:870)
at java.lang.System.loadLibrary(System.java:1122)
at org.bytedeco.javacpp.Loader.loadLibrary(Loader.java:1225)
at org.bytedeco.javacpp.Loader.load(Loader.java:983)
at org.bytedeco.javacpp.Loader.load(Loader.java:882)
at org.bytedeco.javacpp.opencv_core.(opencv_core.java:10)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at org.bytedeco.javacpp.Loader.load(Loader.java:941)
at org.bytedeco.javacpp.Loader.load(Loader.java:882)
at org.bytedeco.javacpp.helper.opencv_core$AbstractArray.(opencv_core.java:109)
at org.datavec.image.loader.NativeImageLoader.streamToMat(NativeImageLoader.java:256)
at org.datavec.image.loader.NativeImageLoader.asMatrix(NativeImageLoader.java:227)
at org.datavec.image.loader.NativeImageLoader.asMatrix(NativeImageLoader.java:221)

org.bytedeco.javacpp.opencv_core ->>>>

@namespace("cv") @NoOffset public static class Mat extends AbstractMat {
static { Loader.load(); }
/** Pointer cast constructor. Invokes {@link Pointer#Pointer(Pointer)}. /
public Mat(Pointer p) { super(p); }
/* Native array allocator. Access with {@link Pointer#position(long)}. */
public Mat(long size) { super((Pointer)null); allocateArray(size); }
private native void allocateArray(long size);
@OverRide public Mat position(long position) {
return (Mat)super.position(position);

[hurschler]

Ok sorry maybe it's the wrong opencv project right?

[vonnieda]

HI @hurschler, yes, wrong project I'm afraid. I think you are looking for this one: https://github.com/bytedeco/javacv

Thanks,
Jason