OpenCV-KotlinNative

• OpenCV-KotlinNative
  • Dependencies
    • Build Environment
    • Runtime dependencies
  • Environment
  • Run
    • sample1: Hello Lena
    • sample2: Scale a image
  • C_Interop
  • Misc (Linux Ubuntu/Debian/Deepin)

Dependencies

Build Environment

• OS:
  • Linux (Ubuntu 18.04 + Deepin 15.5 Desktop)
    • sources build Misc (Linux Ubuntu/Debian/Deepin)
  • macOS Sierra 10.12
    • brew install opencv@2
    • Default Directory /usr/local/opt/opencv@2
• Kotlin Native version: 0.7
• OpenCV 2.4.13
• CLion 2018.1.2

Runtime dependencies

• if Ubuntu or Debian
  • libgtk2.0-dev
  • pkg-config
• libopencv2_core
• libopencv2_highgui

Environment

• macOS Sierra 10.12
• CLion (With Kotlin and Kotlin/Native Plugins)
• JDK 1.8

Run

sample1: Hello Lena

hello_lena-c_interop_version

sample2: Scale a image

Scale

• It needs about 30 seconds ... please wait a moment
• (needs about 15 seconds in OS X with Intel i5 2.3 GHz and about 7 seconds in Linux/Ubuntu(Deepin Desktop Intel i5)
• so if you have a better algorithm to enhance the effect please tell me....)

C_Interop

What you can interact-operator:

• libopencv2_core
• libopencv2_highgui (which include the former)
• libopencv2_imgproc (such as cvThreshold)

import libopencv2_highgui.*

Misc (Linux Ubuntu/Debian/Deepin)

if your libs were installed in /usr/local/lib (Makefile settings with build OpenCV2) like

cd opencv2.4.*
mkdir build
cd build
cmake .. -DCMAKE_INSTALL_PREFIX=/usr/local

then do these as follows:

$ vi /etc/ld.so.conf

append /usr/local/lib at the end:

include /etc/ld.so.conf.d/*.conf   # default
/usr/local/lib

then the command line to flush it.

sudo ldconfig