OpenCV 3.2 lab

Autonomous Machines Jetson & Embedded Systems Jetson TX1
1

It’s a long-awaited update to OpenCV 3.x release series, with tons of improvements and bug fixes. I wonder how is JTX1’s support

2

I have compiled Opencv 3.2 and it’s contrib modules with python3.5 on tx1. It works well.

3

I tried to compile opencv 3.2 with openvx on tx1. but openvx cannot be detected by cmake for opencv.

4

Can u share your compiling configs?

5

It depend on your requirement. If you need cuda, java, of course you need to install them first.

  1. For opengl, you need to relink the libGL.so.
ubuntu@tegra-ubuntu:/media/ubuntu/91df5a31-05fd-4885-b29b-d7e625107ac5/opencv/opencv$ ls /usr/lib/aarch64-linux-gnu/libGL.so -l
lrwxrwxrwx 1 root root 43 Dec 30 04:55 /usr/lib/aarch64-linux-gnu/libGL.so -> /usr/lib/aarch64-linux-gnu/tegra/libGL.so.1
  1. modify below file to using python3.
diff --git a/cmake/OpenCVDetectPython.cmake b/cmake/OpenCVDetectPython.cmake
index 6dec76f..2b17e72 100644
--- a/cmake/OpenCVDetectPython.cmake
+++ b/cmake/OpenCVDetectPython.cmake
@@ -241,9 +241,6 @@ find_python(3.4 "${MIN_VER_PYTHON3}" PYTHON3_LIBRARY PYTHON3_INCLUDE_DIR

 if(PYTHON_DEFAULT_EXECUTABLE)
     set(PYTHON_DEFAULT_AVAILABLE "TRUE")
-elseif(PYTHON2INTERP_FOUND) # Use Python 2 as default Python interpreter
-    set(PYTHON_DEFAULT_AVAILABLE "TRUE")
-    set(PYTHON_DEFAULT_EXECUTABLE "${PYTHON2_EXECUTABLE}")
 elseif(PYTHON3INTERP_FOUND) # Use Python 3 as fallback Python interpreter (if there is no Python 2)
     set(PYTHON_DEFAULT_AVAILABLE "TRUE")
     set(PYTHON_DEFAULT_EXECUTABLE "${PYTHON3_EXECUTABLE}")
  1. other tiny issue.
6

Hi Allen_Z,

Configuring Opencv-3.2.0, OpenGL is found gone
cmake -DCMAKE_BUILD_TYPE=DEBUG -DBUILD_EXAMPLES=ON -DBUILD_TESTS=OFF -DCMAKE_INSTALL_PREFIX=/usr/local/opencv-3.2.0 -DWITH_CUDA=ON -DCUDA_ARCH_BIN=“5.3” -DCUDA_ARCH_PTX=“” -DCUDA_FAST_MATH=ON -DWITH_OPENGL=ON -DWITH_OPENNI2=ON -DWITH_OPENVX=ON -DENABLE_NEON=ON -DWITH_LIBV4L=ON -DOPENCV_EXTRA_MODULES=…/…/opencv_contrib-3.2.0/modules …

– GUI:
– QT: NO
– GTK+ 2.x: YES (ver 2.24.30)
– GThread : YES (ver 2.48.1)
– GtkGlExt: NO
– OpenGL support: NO
– VTK support: NO

However, here exists the libGL:
ubuntu@tegra-ubuntu:~/opencv-3.2.0/build$ ll /usr/lib/aarch64-linux-gnu/libGLso
lrwxrwxrwx 1 root root 19 Nov 10 2015 /usr/lib/aarch64-linux-gnu/libGLEWmx.so.1.13 → libGLEWmx.so.1.13.0
-rw-r–r-- 1 root root 481248 Nov 10 2015 /usr/lib/aarch64-linux-gnu/libGLEWmx.so.1.13.0
lrwxrwxrwx 1 root root 17 Nov 10 2015 /usr/lib/aarch64-linux-gnu/libGLEW.so → libGLEW.so.1.13.0
lrwxrwxrwx 1 root root 17 Nov 10 2015 /usr/lib/aarch64-linux-gnu/libGLEW.so.1.13 → libGLEW.so.1.13.0
-rw-r–r-- 1 root root 554984 Nov 10 2015 /usr/lib/aarch64-linux-gnu/libGLEW.so.1.13.0
lrwxrwxrwx 1 root root 43 Dec 30 10:02 /usr/lib/aarch64-linux-gnu/libGL.so → /usr/lib/aarch64-linux-gnu/tegra/libGL.so.1*
lrwxrwxrwx 1 root root 15 Oct 24 2015 /usr/lib/aarch64-linux-gnu/libGLU.so → libGLU.so.1.3.1
lrwxrwxrwx 1 root root 15 Oct 24 2015 /usr/lib/aarch64-linux-gnu/libGLU.so.1 → libGLU.so.1.3.1
-rw-r–r-- 1 root root 400040 Oct 24 2015 /usr/lib/aarch64-linux-gnu/libGLU.so.1.3.1

ubuntu@tegra-ubuntu:~/opencv-3.2.0/build$ ldconfig -p | grep libGL*
libGeoIP.so.1 (libc6,AArch64) => /usr/lib/aarch64-linux-gnu/libGeoIP.so.1
libGLdispatch.so.0 (libc6,AArch64) => /usr/lib/aarch64-linux-gnu/tegra/libGLdispatch.so.0
libGLU.so.1 (libc6,AArch64) => /usr/lib/aarch64-linux-gnu/libGLU.so.1
libGLU.so (libc6,AArch64) => /usr/lib/aarch64-linux-gnu/libGLU.so
libGLEWmx.so.1.13 (libc6,AArch64) => /usr/lib/aarch64-linux-gnu/libGLEWmx.so.1.13
libGLEW.so.1.13 (libc6,AArch64) => /usr/lib/aarch64-linux-gnu/libGLEW.so.1.13
libGLEW.so (libc6,AArch64) => /usr/lib/aarch64-linux-gnu/libGLEW.so
libGLESv2.so.2 (libc6,AArch64) => /usr/lib/aarch64-linux-gnu/tegra-egl/libGLESv2.so.2
libGLESv1_CM.so.1 (libc6,AArch64) => /usr/lib/aarch64-linux-gnu/tegra-egl/libGLESv1_CM.so.1
libGL.so.1 (libc6,AArch64) => /usr/lib/aarch64-linux-gnu/tegra/libGL.so.1
libGL.so (libc6,AArch64) => /usr/lib/aarch64-linux-gnu/libGL.so
libGL.so (libc6,AArch64) => /usr/lib/aarch64-linux-gnu/tegra/libGL.so

How does it support OpenGL?

7

have a solution myself

sudo apt-get install libgtkglext1 libgtkglext1-dev
sudo apt-get install qtbase5-dev

afterwards output lists:
– GUI:
– QT: NO
– GTK+ 2.x: YES (ver 2.24.30)
– GThread : YES (ver 2.48.1)
– GtkGlExt: YES (ver 1.2.0)
– OpenGL support: YES (/usr/lib/aarch64-linux-gnu/libGLU.so /usr/lib/aarch64-linux-gnu/libGL.so)
– VTK support: NO

8

A non-full JetPack installation is owned. I cannot find OpenVX source and its installpack. How do I install OpenVX standalone.

9

building 3rdparty/carotene failed. Using -DENABLE_NEON=OFF, build ok.