Opencv 3.0 contrib Java

asked 2015-08-06 23:18:14 -0600

LgArcida gravatar image

I want to use the BackgroundSubtractorMOG from the opencv_contrib but seems like some modules are no ready for Java. Are all extras modules available for Java? am I missing an step? I follow this

http://www.pyimagesearch.com/2015/07/...

All the rest seems to be working good. All help will be appreciated.

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Comments

you could try to enable the java wrappers for the bgsegm module:

change this to: ocv_define_module(bgsegm opencv_core opencv_imgproc opencv_video opencv_highgui WRAP python java)

and rerun cmake/make/install

berak gravatar imageberak ( 2015-08-07 00:45:14 -0600 )edit

This seems to be a good idea, but I a not sure where this command should be included Could you point me to the right direction?

LgArcida gravatar imageLgArcida ( 2015-08-07 07:30:11 -0600 )edit

again, try to change the CmakeLists.txt file there, and rerun cmake.

berak gravatar imageberak ( 2015-08-07 07:36:30 -0600 )edit

While make is running there is some javac errors

[javac] /home/du/opencv/build/src/org/opencv/bgsegm/BackgroundSubtractorGMG.java:11: error: cannot find symbol
[javac] public class BackgroundSubtractorGMG extends BackgroundSubtractor {
[javac]                                              ^
[javac]   symbol: class BackgroundSubtractor
[javac] /home/du/opencv/build/src/org/opencv/bgsegm/BackgroundSubtractorMOG.java:11: error: cannot find symbol
[javac] public class BackgroundSubtractorMOG extends BackgroundSubtractor {
[javac]                                              ^
[javac]   symbol: class BackgroundSubtractor[ 73%]

Make fails with error 2 ant 75%

LgArcida gravatar imageLgArcida ( 2015-08-08 01:15:33 -0600 )edit

Is there something missing or a required step?

LgArcida gravatar imageLgArcida ( 2015-08-08 01:17:19 -0600 )edit

oh, sorry, my bad, whole idea does not seem to work.

berak gravatar imageberak ( 2015-08-10 03:39:57 -0600 )edit

No worries, was worth the shot. So, any idea?

LgArcida gravatar imageLgArcida ( 2015-08-10 14:19:50 -0600 )edit

Seems like when making bgsem is trying to import BackgroundSubtractor class. But since BackgroundSubtractor is in a separate package there is an error. Is there a way to update the paths for making the import?

LgArcida gravatar imageLgArcida ( 2015-08-10 14:41:00 -0600 )edit

it should import opencv.video, but it does not. there is a section in the generator script, that handles the imports, but i did not dare to fumble with that.

on win, the opencv_java300.jar / dll still gets built, it just does not contain anything from bgsegm.

sorry again, no clue atm.

berak gravatar imageberak ( 2015-08-11 00:21:40 -0600 )edit
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