159 lines
2.7 KiB
Markdown
159 lines
2.7 KiB
Markdown
Di Ubuntu 26.04, repo resmi sudah pakai OpenCV lebih baru (≈4.10), jadi kalau kamu mau **OpenCV 4.6**, cara paling aman adalah **build manual dengan prefix terpisah** supaya tidak bentrok dengan versi sistem.
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Berikut setup yang **stabil + rapi + tidak konflik** 👇
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---
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# 🎯 Strategi yang benar
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* ❌ Jangan timpa `/usr` (punya apt)
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* ✅ Install ke lokasi khusus: `/opt/opencv-4.6`
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* ✅ Gunakan `PKG_CONFIG_PATH` untuk memilih versi
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---
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# 🚀 1. Install dependency
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```bash
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sudo apt update
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sudo apt install -y build-essential cmake git pkg-config
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```
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---
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# 📥 2. Download OpenCV 4.6
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```bash
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git clone https://github.com/opencv/opencv.git
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cd opencv
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git checkout 4.6.0
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mkdir build && cd build
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```
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---
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# ⚙️ 3. Konfigurasi minimal (ringan + stabil)
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## 👉 Profil cocok untuk Go / ArUco
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```bash
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cmake .. \
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-DCMAKE_BUILD_TYPE=Release \
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-DCMAKE_INSTALL_PREFIX=/opt/opencv-4.6 \
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-DBUILD_LIST=core,imgproc,imgcodecs,calib3d,aruco \
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-DBUILD_SHARED_LIBS=ON \
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-DWITH_IPP=OFF \
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-DWITH_TBB=OFF \
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-DWITH_OPENMP=ON \
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-DWITH_CUDA=OFF \
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-DWITH_OPENCL=OFF \
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-DWITH_FFMPEG=OFF \
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-DWITH_GSTREAMER=OFF \
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-DWITH_QT=OFF \
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-DWITH_GTK=OFF \
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-DBUILD_TESTS=OFF \
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-DBUILD_PERF_TESTS=OFF \
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-DBUILD_EXAMPLES=OFF \
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-DBUILD_JAVA=OFF \
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-DBUILD_opencv_python=OFF
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```
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---
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# 🔨 4. Build & install
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```bash
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make -j$(nproc)
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sudo make install
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sudo ldconfig
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```
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---
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# 🔗 5. Aktifkan OpenCV 4.6 (penting)
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## Temporary:
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```bash
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export PKG_CONFIG_PATH=/opt/opencv-4.6/lib/pkgconfig
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export LD_LIBRARY_PATH=/opt/opencv-4.6/lib:$LD_LIBRARY_PATH
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```
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## Permanen:
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```bash
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echo 'export PKG_CONFIG_PATH=/opt/opencv-4.6/lib/pkgconfig' >> ~/.bashrc
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echo 'export LD_LIBRARY_PATH=/opt/opencv-4.6/lib:$LD_LIBRARY_PATH' >> ~/.bashrc
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source ~/.bashrc
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```
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---
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# 🧪 6. Verifikasi
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```bash
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pkg-config --modversion opencv4
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```
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👉 Harus keluar:
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```
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4.6.0
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```
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---
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# 🚀 7. Build ulang Go / C++ kamu
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```bash
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go clean -cache -modcache -i -r
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go build -o aruco
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```
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atau C++:
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```bash
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g++ aruco.cpp -o aruco `pkg-config --cflags --libs opencv4`
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```
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---
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# ⚠️ Hal penting (biar tidak error lagi)
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* Jangan campur:
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* `/usr/lib` (OpenCV 4.10 dari apt)
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* `/opt/opencv-4.6` (manual)
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* Selalu set `PKG_CONFIG_PATH`
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* Selalu rebuild setelah ganti versi
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---
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# 🧠 Tips pro
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Kalau mau switch versi:
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```bash
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# pakai 4.6
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export PKG_CONFIG_PATH=/opt/opencv-4.6/lib/pkgconfig
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# balik ke system (4.10)
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export PKG_CONFIG_PATH=/usr/lib/x86_64-linux-gnu/pkgconfig
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```
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---
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# 🏁 Kesimpulan
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✔ Bisa install OpenCV 4.6 di Ubuntu 26.04
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✔ Jangan pakai apt → harus build manual
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✔ Gunakan prefix `/opt` biar clean
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✔ Aman dipakai bareng Go / GoCV
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---
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Kalau mau, saya bisa bantu:
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* bikin script otomatis install (1x jalan langsung beres)
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* atau buat Docker image Go + OpenCV 4.6 super ringan (production-ready)
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