diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index d36c6107..469bece1 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -4052,10 +4052,117 @@ jobs:
         name: ${{ env.PACKAGENAME }}
         path: ${{ env.PACKAGENAME }}.zip
 
+  milkv-duo-opencv4:
+    runs-on: ubuntu-latest
+    env:
+      OPENCV_VERSION: 4.8.0
+      PACKAGENAME: opencv-mobile-4.8.0-milkv-duo
+    steps:
+    - uses: actions/checkout@v3
+    - name: toolchain
+      run: |
+        wget -q https://sophon-file.sophon.cn/sophon-prod-s3/drive/23/03/07/16/host-tools.tar.gz -O host-tools.tar.gz
+        tar -xf host-tools.tar.gz
+    - name: opencv-source
+      run: |
+        wget -q https://github.com/opencv/opencv/archive/${{ env.OPENCV_VERSION }}.zip -O opencv-${{ env.OPENCV_VERSION }}.zip
+        unzip -q opencv-${{ env.OPENCV_VERSION }}.zip
+        cd opencv-${{ env.OPENCV_VERSION }}
+        truncate -s 0 cmake/OpenCVFindLibsGrfmt.cmake
+        rm -rf modules/gapi
+        patch -p1 -i ../opencv-4.8.0-no-rtti.patch
+        patch -p1 -i ../opencv-4.8.0-no-zlib.patch
+        patch -p1 -i ../opencv-4.8.0-link-openmp.patch
+        rm -rf modules/highgui
+        cp -r ../highgui modules/
+    - name: build
+      run: |
+        cd opencv-${{ env.OPENCV_VERSION }}
+        mkdir build && cd build
+        export RISCV_ROOT_PATH=$GITHUB_WORKSPACE/host-tools/gcc/riscv64-linux-musl-x86_64
+        cmake -DCMAKE_TOOLCHAIN_FILE=../../toolchains/riscv64-unknown-linux-musl.toolchain.cmake \
+            -DCMAKE_C_FLAGS="-fno-rtti -fno-exceptions" -DCMAKE_CXX_FLAGS="-fno-rtti -fno-exceptions" \
+            -DCMAKE_INSTALL_PREFIX=install -DCMAKE_BUILD_TYPE=Release `cat ../../opencv4_cmake_options.txt` -DBUILD_opencv_world=OFF -DOPENCV_DISABLE_FILESYSTEM_SUPPORT=ON ..
+        cmake --build . -j 2
+        cmake --build . --target install
+    - name: package
+      run: |
+        mkdir ${{ env.PACKAGENAME }}
+        cp -rf opencv-${{ env.OPENCV_VERSION }}/build/install/* ${{ env.PACKAGENAME }}/
+        rm -rf ${{ env.PACKAGENAME }}/share/opencv4
+        zip -9 -r ${{ env.PACKAGENAME }}.zip ${{ env.PACKAGENAME }}
+    - name: test
+      run: |
+        cd test
+        mkdir build && cd build
+        export RISCV_ROOT_PATH=$GITHUB_WORKSPACE/host-tools/gcc/riscv64-linux-musl-x86_64
+        cmake -DCMAKE_TOOLCHAIN_FILE=../../toolchains/riscv64-unknown-linux-musl.toolchain.cmake \
+            -DCMAKE_C_FLAGS="-fno-rtti -fno-exceptions" -DCMAKE_CXX_FLAGS="-fno-rtti -fno-exceptions" \
+            -DCMAKE_BUILD_TYPE=Release -DOpenCV_DIR=$GITHUB_WORKSPACE/${{ env.PACKAGENAME }}/lib/cmake/opencv4 ..
+        cmake --build . -j 2
+    - name: upload
+      uses: actions/upload-artifact@v3
+      with:
+        name: ${{ env.PACKAGENAME }}
+        path: ${{ env.PACKAGENAME }}.zip
+
+  luckfox-pico-opencv4:
+    runs-on: ubuntu-latest
+    env:
+      OPENCV_VERSION: 4.8.0
+      PACKAGENAME: opencv-mobile-4.8.0-luckfox-pico
+    steps:
+    - uses: actions/checkout@v3
+    - name: toolchain
+      run: |
+        git clone --depth 1 https://github.com/LuckfoxTECH/luckfox-pico.git luckfox-pico
+    - name: opencv-source
+      run: |
+        wget -q https://github.com/opencv/opencv/archive/${{ env.OPENCV_VERSION }}.zip -O opencv-${{ env.OPENCV_VERSION }}.zip
+        unzip -q opencv-${{ env.OPENCV_VERSION }}.zip
+        cd opencv-${{ env.OPENCV_VERSION }}
+        truncate -s 0 cmake/OpenCVFindLibsGrfmt.cmake
+        rm -rf modules/gapi
+        patch -p1 -i ../opencv-4.8.0-no-rtti.patch
+        patch -p1 -i ../opencv-4.8.0-no-zlib.patch
+        patch -p1 -i ../opencv-4.8.0-link-openmp.patch
+        rm -rf modules/highgui
+        cp -r ../highgui modules/
+    - name: build
+      run: |
+        cd opencv-${{ env.OPENCV_VERSION }}
+        mkdir build && cd build
+        export TOOLCHAIN_ROOT_PATH=$GITHUB_WORKSPACE/luckfox-pico/tools/linux/toolchain/arm-rockchip830-linux-uclibcgnueabihf
+        cmake -DCMAKE_TOOLCHAIN_FILE=../../toolchains/arm-rockchip830-linux-uclibcgnueabihf.toolchain.cmake \
+            -DCMAKE_C_FLAGS="-fno-rtti -fno-exceptions" -DCMAKE_CXX_FLAGS="-fno-rtti -fno-exceptions" \
+            -DCMAKE_INSTALL_PREFIX=install -DCMAKE_BUILD_TYPE=Release `cat ../../opencv4_cmake_options.txt` -DBUILD_opencv_world=OFF -DOPENCV_DISABLE_FILESYSTEM_SUPPORT=ON ..
+        cmake --build . -j 2
+        cmake --build . --target install
+    - name: package
+      run: |
+        mkdir ${{ env.PACKAGENAME }}
+        cp -rf opencv-${{ env.OPENCV_VERSION }}/build/install/* ${{ env.PACKAGENAME }}/
+        rm -rf ${{ env.PACKAGENAME }}/share/opencv4
+        zip -9 -r ${{ env.PACKAGENAME }}.zip ${{ env.PACKAGENAME }}
+    - name: test
+      run: |
+        cd test
+        mkdir build && cd build
+        export TOOLCHAIN_ROOT_PATH=$GITHUB_WORKSPACE/luckfox-pico/tools/linux/toolchain/arm-rockchip830-linux-uclibcgnueabihf
+        cmake -DCMAKE_TOOLCHAIN_FILE=../../toolchains/arm-rockchip830-linux-uclibcgnueabihf.toolchain.cmake \
+            -DCMAKE_C_FLAGS="-fno-rtti -fno-exceptions" -DCMAKE_CXX_FLAGS="-fno-rtti -fno-exceptions" \
+            -DCMAKE_BUILD_TYPE=Release -DOpenCV_DIR=$GITHUB_WORKSPACE/${{ env.PACKAGENAME }}/lib/cmake/opencv4 ..
+        cmake --build . -j 2
+    - name: upload
+      uses: actions/upload-artifact@v3
+      with:
+        name: ${{ env.PACKAGENAME }}
+        path: ${{ env.PACKAGENAME }}.zip
+
   release:
     permissions:
       contents: write  # for softprops/action-gh-release to create a release
-    needs: [setup, android-opencv4, android-opencv3, android-opencv2, ios-opencv4, ios-opencv3, ios-opencv2, ios-opencv4-bitcode, ios-opencv3-bitcode, ios-opencv2-bitcode, ios-simulator-opencv4, ios-simulator-opencv3, ios-simulator-opencv2, ios-simulator-opencv4-bitcode, ios-simulator-opencv3-bitcode, ios-simulator-opencv2-bitcode, armlinux-opencv4, armlinux-opencv3, armlinux-opencv2, macos-opencv4, macos-opencv3, macos-opencv2, mac-catalyst-opencv4, mac-catalyst-opencv3, mac-catalyst-opencv2, mac-catalyst-opencv4-bitcode, mac-catalyst-opencv3-bitcode, mac-catalyst-opencv2-bitcode, windows-vs2015-opencv4, windows-vs2015-opencv3, windows-vs2015-opencv2, windows-vs2017-opencv4, windows-vs2017-opencv3, windows-vs2017-opencv2, windows-vs2019-opencv4, windows-vs2019-opencv3, windows-vs2019-opencv2, windows-vs2022-opencv4, windows-vs2022-opencv3, windows-vs2022-opencv2, ubuntu-2004-opencv4, ubuntu-2004-opencv3, ubuntu-2004-opencv2, ubuntu-2204-opencv4, ubuntu-2204-opencv3, ubuntu-2204-opencv2, webassembly-opencv4, webassembly-opencv3, webassembly-opencv2, apple-opencv4, apple-opencv3, apple-opencv2, apple-opencv4-bitcode, apple-opencv3-bitcode, apple-opencv2-bitcode]
+    needs: [setup, android-opencv4, android-opencv3, android-opencv2, ios-opencv4, ios-opencv3, ios-opencv2, ios-opencv4-bitcode, ios-opencv3-bitcode, ios-opencv2-bitcode, ios-simulator-opencv4, ios-simulator-opencv3, ios-simulator-opencv2, ios-simulator-opencv4-bitcode, ios-simulator-opencv3-bitcode, ios-simulator-opencv2-bitcode, armlinux-opencv4, armlinux-opencv3, armlinux-opencv2, macos-opencv4, macos-opencv3, macos-opencv2, mac-catalyst-opencv4, mac-catalyst-opencv3, mac-catalyst-opencv2, mac-catalyst-opencv4-bitcode, mac-catalyst-opencv3-bitcode, mac-catalyst-opencv2-bitcode, windows-vs2015-opencv4, windows-vs2015-opencv3, windows-vs2015-opencv2, windows-vs2017-opencv4, windows-vs2017-opencv3, windows-vs2017-opencv2, windows-vs2019-opencv4, windows-vs2019-opencv3, windows-vs2019-opencv2, windows-vs2022-opencv4, windows-vs2022-opencv3, windows-vs2022-opencv2, ubuntu-2004-opencv4, ubuntu-2004-opencv3, ubuntu-2004-opencv2, ubuntu-2204-opencv4, ubuntu-2204-opencv3, ubuntu-2204-opencv2, webassembly-opencv4, webassembly-opencv3, webassembly-opencv2, apple-opencv4, apple-opencv3, apple-opencv2, apple-opencv4-bitcode, apple-opencv3-bitcode, apple-opencv2-bitcode, milkv-duo-opencv4, luckfox-pico-opencv4]
     runs-on: ubuntu-latest
     steps:
     - name: download
diff --git a/README.md b/README.md
index 37fdbb90..8156d1bb 100644
--- a/README.md
+++ b/README.md
@@ -55,7 +55,6 @@ https://github.com/nihui/opencv-mobile/releases/latest
 |Ubuntu-20.04|x86_64|[![download-icon]][opencv2-ubuntu-2004-url]|[![download-icon]][opencv3-ubuntu-2004-url]|[![download-icon]][opencv4-ubuntu-2004-url]|
 |Ubuntu-22.04|x86_64|[![download-icon]][opencv2-ubuntu-2204-url]|[![download-icon]][opencv3-ubuntu-2204-url]|[![download-icon]][opencv4-ubuntu-2204-url]|
 |WebAssembly|basic<br />simd<br />threads<br />simd+threads|[![download-icon]][opencv2-webassembly-url]|[![download-icon]][opencv3-webassembly-url]|[![download-icon]][opencv4-webassembly-url]|
-|RISCV-Linux|milkv-duo| | |[![download-icon]][opencv4-milkv-duo-url]|
 
 [download-icon]: https://img.shields.io/badge/download-blue?style=for-the-badge
 [bitcode-icon]: https://img.shields.io/badge/+bitcode-blue?style=for-the-badge
@@ -132,7 +131,13 @@ https://github.com/nihui/opencv-mobile/releases/latest
 [opencv3-webassembly-url]: https://github.com/nihui/opencv-mobile/releases/latest/download/opencv-mobile-3.4.20-webassembly.zip
 [opencv4-webassembly-url]: https://github.com/nihui/opencv-mobile/releases/latest/download/opencv-mobile-4.8.0-webassembly.zip
 
+|Board|Target|opencv-4.8.0|
+|:-:|:-:|:-:|
+|milkv-duo|riscv64-linux-musl|[![download-icon]][opencv4-milkv-duo-url]|
+|luckfox-pico|arm-linux-uclibcgnueabihf|[![download-icon]][opencv4-luckfox-pico-url]|
+
 [opencv4-milkv-duo-url]: https://github.com/nihui/opencv-mobile/releases/latest/download/opencv-mobile-4.8.0-milkv-duo.zip
+[opencv4-luckfox-pico-url]: https://github.com/nihui/opencv-mobile/releases/latest/download/opencv-mobile-4.8.0-luckfox-pico.zip
 
 * Android package build with ndk r25c and android api 24
 * iOS / iOS-Simulator / MacOS / Mac-Catalyst package build with Xcode 13.4.1
diff --git a/toolchains/arm-rockchip830-linux-uclibcgnueabihf.toolchain.cmake b/toolchains/arm-rockchip830-linux-uclibcgnueabihf.toolchain.cmake
new file mode 100644
index 00000000..4442bf21
--- /dev/null
+++ b/toolchains/arm-rockchip830-linux-uclibcgnueabihf.toolchain.cmake
@@ -0,0 +1,24 @@
+set(CMAKE_SYSTEM_NAME Linux)
+set(CMAKE_SYSTEM_PROCESSOR arm)
+
+if(DEFINED ENV{TOOLCHAIN_ROOT_PATH})
+    file(TO_CMAKE_PATH $ENV{TOOLCHAIN_ROOT_PATH} TOOLCHAIN_ROOT_PATH)
+else()
+    message(FATAL_ERROR "TOOLCHAIN_ROOT_PATH env must be defined")
+endif()
+
+set(TOOLCHAIN_ROOT_PATH ${TOOLCHAIN_ROOT_PATH} CACHE STRING "root path to toolchain")
+
+set(CMAKE_C_COMPILER "${TOOLCHAIN_ROOT_PATH}/bin/arm-rockchip830-linux-uclibcgnueabihf-gcc")
+set(CMAKE_CXX_COMPILER "${TOOLCHAIN_ROOT_PATH}/bin/arm-rockchip830-linux-uclibcgnueabihf-g++")
+
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+
+set(CMAKE_C_FLAGS "-march=armv7-a -mfloat-abi=hard -mfpu=neon")
+set(CMAKE_CXX_FLAGS "-march=armv7-a -mfloat-abi=hard -mfpu=neon")
+
+# cache flags
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS}" CACHE STRING "c flags")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}" CACHE STRING "c++ flags")