diff --git a/.github/workflows/PR-4.x-ARM64.yaml b/.github/workflows/PR-4.x-ARM64.yaml
deleted file mode 100644
index 72af61f412..0000000000
--- a/.github/workflows/PR-4.x-ARM64.yaml
+++ /dev/null
@@ -1,181 +0,0 @@
-name: PR:4.x ARM64
-
-on:
-  pull_request:
-    branches:
-      - 4.x
-
-env:
-  EXTRA_CMAKE_OPTIONS: '-DBUILD_DOCS=ON -DPYTHON_DEFAULT_EXECUTABLE=/usr/bin/python3 -DBUILD_opencv_xfeatures2d=OFF -DBUILD_EXAMPLES=ON -DOPENCV_ENABLE_NONFREE=ON -DENABLE_CCACHE=OFF'
-  OPENCV_TEST_DATA_PATH: '/opencv_extra/testdata'
-  OPENCV_DOCKER_WORKDIR: '/__w/opencv/opencv'
-  PR_AUTHOR: ${{ github.event.pull_request.user.login }}
-  PR_AUTHOR_FORK: ${{ github.event.pull_request.head.repo.full_name }}
-  SOURCE_BRANCH_NAME: ${{ github.head_ref }}
-  TARGET_BRANCH_NAME: ${{ github.base_ref }}
-  ANT_HOME: '/usr/share/ant'
-  PYTHONPATH: /opencv-build/python_loader:$PYTHONPATH
-
-jobs:
-  BuildAndTest:
-    runs-on: opencv-cn-lin-arm64
-    defaults:
-      run:
-        shell: bash
-    container:
-      image: quay.io/opencv-ci/opencv-ubuntu:20.04-arm64
-    steps:
-    - name: PR info
-      run: |
-        echo "PR Author: ${{ env.PR_AUTHOR }}"
-        echo "PR Author fork: ${{ env.PR_AUTHOR_FORK }}"
-        echo "Source branch name: ${{ env.SOURCE_BRANCH_NAME }}"
-        echo "Target branch name: ${{ env.TARGET_BRANCH_NAME }}"
-    - name: Clean
-      run: find . -mindepth 1 -delete
-    - name: Fetch opencv
-      uses: actions/checkout@v3
-      with:
-        repository: opencv/opencv
-        ref: ${{ env.TARGET_BRANCH_NAME }}
-        fetch-depth: 0
-    - name: Merge opencv with ${{ env.SOURCE_BRANCH_NAME }} branch
-      run: |
-        cd ${{ env.OPENCV_DOCKER_WORKDIR }}
-        git config --global --add safe.directory ${{ env.OPENCV_DOCKER_WORKDIR }}
-        git config user.email "opencv.ci"
-        git config user.name "opencv.ci"
-        git pull -v "https://github.com/${{ env.PR_AUTHOR_FORK }}" "${{ env.SOURCE_BRANCH_NAME }}"
-    - name: Clone opencv_extra
-      run: git clone --single-branch --branch ${{ env.TARGET_BRANCH_NAME }} https://github.com/opencv/opencv_extra.git /opencv_extra
-    - name: Merge opencv_extra with ${{ env.SOURCE_BRANCH_NAME }} branch
-      run: |
-        OPENCV_EXTRA_FORK=$(git ls-remote --heads "https://github.com/${{ env.PR_AUTHOR }}/opencv_extra" "${{ env.SOURCE_BRANCH_NAME }}") || true
-        if [[ ! -z "$OPENCV_EXTRA_FORK" ]]; then
-          echo "Merge opencv_extra with ${{ env.SOURCE_BRANCH_NAME }} branch"
-          cd /opencv_extra
-          git config user.email "opencv.ci"
-          git config user.name "opencv.ci"
-          git pull -v "https://github.com/${{ env.PR_AUTHOR }}/opencv_extra" "${{ env.SOURCE_BRANCH_NAME }}"
-        else
-          echo "No merge since ${{ env.PR_AUTHOR }}/opencv_extra does not have branch ${{ env.SOURCE_BRANCH_NAME }}"
-        fi
-    - name: Configure OpenCV
-      run: |
-        cmake -G Ninja -B /opencv-build ${{ env.EXTRA_CMAKE_OPTIONS }} ${{ env.OPENCV_DOCKER_WORKDIR }}
-    - name: Build OpenCV
-      run: |
-        cd /opencv-build
-        ninja
-    - name: Accuracy:calib3d
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_calib3d
-    - name: Accuracy:core
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_core
-    - name: Accuracy:dnn
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_dnn
-    - name: Accuracy:features2d
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_features2d
-    - name: Accuracy:flann
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_flann
-    - name: Accuracy:highgui
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_highgui
-    - name: Accuracy:imgcodecs
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_imgcodecs
-    - name: Accuracy:imgproc
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_imgproc
-    - name: Accuracy:ml
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_ml
-    - name: Accuracy:objdetect
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_objdetect --gtest_filter="-Objdetect_QRCode_Close.regression/0:Objdetect_QRCode_Close.regression/4"
-    - name: Accuracy:photo
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_photo --gtest_filter="-Photo_CalibrateDebevec.regression"
-    - name: Accuracy:stitching
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_stitching
-    - name: Accuracy:video
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_video
-    - name: Accuracy:videoio
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_videoio
-    - name: Performance:calib3d
-      run: cd /opencv-build && xvfb-run -a bin/opencv_perf_calib3d --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1
-    - name: Performance:core
-      run: cd /opencv-build && xvfb-run -a bin/opencv_perf_core --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1
-    - name: Performance:dnn
-      run: cd /opencv-build && xvfb-run -a bin/opencv_perf_dnn --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1
-    - name: Performance:features2d
-      run: cd /opencv-build && xvfb-run -a bin/opencv_perf_features2d --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1
-    - name: Performance:imgcodecs
-      run: cd /opencv-build && xvfb-run -a bin/opencv_perf_imgcodecs --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1
-    - name: Performance:imgproc
-      run: cd /opencv-build && xvfb-run -a bin/opencv_perf_imgproc --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1
-    - name: Performance:objdetect
-      run: cd /opencv-build && xvfb-run -a bin/opencv_perf_objdetect --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1 --gtest_filter="-Perf_Objdetect_QRCode.detect/2:Perf_Objdetect_QRCode_Multi.decodeMulti*:Perf_Objdetect_QRCode_Multi.detectMulti*"
-    - name: Performance:photo
-      run: cd /opencv-build && xvfb-run -a bin/opencv_perf_photo --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1
-    - name: Performance:stitching
-      run: cd /opencv-build && xvfb-run -a bin/opencv_perf_stitching --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1
-    - name: Performance:video
-      run: cd /opencv-build && xvfb-run -a bin/opencv_perf_video --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1
-    - name: Performance:videoio
-      run: cd /opencv-build && xvfb-run -a bin/opencv_perf_videoio --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1
-    - name: Python3
-      run: |
-        cd ${{ env.OPENCV_DOCKER_WORKDIR }}/modules/python/test
-        python3 ./test.py --repo ../../../ -v
-    - name: Java
-      run: cd /opencv-build && xvfb-run -a python3 ${{ env.OPENCV_DOCKER_WORKDIR }}/modules/ts/misc/run.py . -a -t java
-    - name: Save Unit Test Results
-      uses: actions/upload-artifact@v3
-      if: always()
-      with:
-        name: junit-html
-        path: /opencv-build/java_test/testResults/junit-noframes.html
-
-  BuildContrib:
-    runs-on: opencv-cn-lin-arm64
-    defaults:
-      run:
-        shell: bash
-    container:
-      image: docker.io/yuentau/ocv_ubuntu:20.04-arm64
-    steps:
-    - name: PR info
-      run: |
-        echo "PR Author: ${{ env.PR_AUTHOR }}"
-        echo "Source branch name: ${{ env.SOURCE_BRANCH_NAME }}"
-        echo "Target branch name: ${{ env.TARGET_BRANCH_NAME }}"
-    - name: Clean
-      run: find . -mindepth 1 -delete
-    - name: Fetch opencv
-      uses: actions/checkout@v3
-      with:
-        repository: opencv/opencv
-        ref: ${{ env.TARGET_BRANCH_NAME }}
-        fetch-depth: 0
-    - name: Merge opencv with a test branch
-      run: |
-        cd ${{ env.OPENCV_DOCKER_WORKDIR }}
-        git config --global --add safe.directory ${{ env.OPENCV_DOCKER_WORKDIR }}
-        git config user.email "opencv.ci"
-        git config user.name "opencv.ci"
-        git pull -v "https://github.com/${{ env.PR_AUTHOR_FORK }}" "${{ env.SOURCE_BRANCH_NAME }}"
-    - name: Clone opencv_contrib
-      run: git clone --single-branch --branch ${{ env.TARGET_BRANCH_NAME }} https://github.com/opencv/opencv_contrib.git /opencv_contrib
-    - name: Merge opencv_contrib with ${{ env.SOURCE_BRANCH_NAME }} branch
-      run: |
-        OPENCV_CONTRIB_FORK=$(git ls-remote --heads "https://github.com/${{ env.PR_AUTHOR }}/opencv_contrib" "${{ env.SOURCE_BRANCH_NAME }}") || true
-        if [[ ! -z "$OPENCV_CONTRIB_FORK" ]]; then
-          echo "Merge opencv_contrib with ${{ env.SOURCE_BRANCH_NAME }} branch"
-          cd /opencv_contrib
-          git config user.email "opencv.ci"
-          git config user.name "opencv.ci"
-          git pull -v "https://github.com/${{ env.PR_AUTHOR }}/opencv_contrib" "${{ env.SOURCE_BRANCH_NAME }}"
-        else
-          echo "No merge since ${{ env.PR_AUTHOR }}/opencv_contrib does not have branch ${{ env.SOURCE_BRANCH_NAME }}"
-        fi
-    - name: Configure OpenCV Contrib
-      run: |
-        cmake -G Ninja -B /opencv-contrib-build ${{ env.EXTRA_CMAKE_OPTIONS }} -DOPENCV_EXTRA_MODULES_PATH=/opencv_contrib/modules ${{ env.OPENCV_DOCKER_WORKDIR }}
-    - name: Build OpenCV Contrib
-      run: |
-        cd /opencv-contrib-build
-        ninja
diff --git a/.github/workflows/PR-4.x-U20.yaml b/.github/workflows/PR-4.x-U20.yaml
deleted file mode 100644
index 10b0847bab..0000000000
--- a/.github/workflows/PR-4.x-U20.yaml
+++ /dev/null
@@ -1,189 +0,0 @@
-name: PR:4.x U20
-
-on:
-  pull_request:
-    branches:
-      - 4.x
-
-env:
-  EXTRA_CMAKE_OPTIONS: '-DBUILD_DOCS=ON -DPYTHON_DEFAULT_EXECUTABLE=/usr/bin/python3 -DOPENCV_DOWNLOAD_PATH=/home/ci/binaries_cache -DBUILD_EXAMPLES=ON -DOPENCV_ENABLE_NONFREE=ON'
-  PR_AUTHOR: ${{ github.event.pull_request.user.login }}
-  PR_AUTHOR_FORK: ${{ github.event.pull_request.head.repo.full_name }}
-  SOURCE_BRANCH_NAME: ${{ github.head_ref }}
-  TARGET_BRANCH_NAME: ${{ github.base_ref }}
-  ANT_HOME: /usr/share/ant
-  GIT_CACHE_DOCKER: /home/ci/git_cache
-  PYTHONPATH: /opencv-build/python_loader:$PYTHONPATH
-  OPENCV_TEST_DATA_PATH: /opencv_extra/testdata
-  OPENCV_DOCKER_WORKDIR: /opencv
-
-jobs:
-  BuildAndTest:
-    runs-on: opencv-cn-lin-x86-64
-    defaults:
-      run:
-        shell: bash
-    container:
-      image: quay.io/asenyaev/opencv-ubuntu:20.04
-      volumes:
-        - /home/opencv-cn/git_cache:/home/ci/git_cache
-        - /home/opencv-cn/ci_cache/opencv:/home/ci/.ccache
-        - /home/opencv-cn/binaries_cache:/home/ci/binaries_cache
-    steps:
-    - name: PR info
-      run: |
-        echo "PR Author: ${{ env.PR_AUTHOR }}"
-        echo "Source branch name: ${{ env.SOURCE_BRANCH_NAME }}"
-        echo "Target branch name: ${{ env.TARGET_BRANCH_NAME }}"
-    - name: Clean
-      run: find ${{ env.OPENCV_DOCKER_WORKDIR }} -mindepth 1 -delete
-    - name: Fetch opencv
-      run: git clone --branch ${{ env.TARGET_BRANCH_NAME }} --reference ${{ env.GIT_CACHE_DOCKER }}/opencv.git https://github.com/opencv/opencv.git ${{ env.OPENCV_DOCKER_WORKDIR }}
-    - name: Merge opencv with ${{ env.SOURCE_BRANCH_NAME }} branch
-      run: |
-        cd ${{ env.OPENCV_DOCKER_WORKDIR }}
-        git config --global --add safe.directory ${{ env.OPENCV_DOCKER_WORKDIR }}
-        git config user.email "opencv.ci"
-        git config user.name "opencv.ci"
-        git pull -v "https://github.com/${{ env.PR_AUTHOR_FORK }}" "${{ env.SOURCE_BRANCH_NAME }}"
-    - name: Clone opencv_extra
-      run: git clone --single-branch --branch ${{ env.TARGET_BRANCH_NAME }} --reference ${{ env.GIT_CACHE_DOCKER }}/opencv_extra.git https://github.com/opencv/opencv_extra.git /opencv_extra
-    - name: Merge opencv_extra with ${{ env.SOURCE_BRANCH_NAME }} branch
-      run: |
-        OPENCV_EXTRA_FORK=$(git ls-remote --heads "https://github.com/${{ env.PR_AUTHOR }}/opencv_extra" "${{ env.SOURCE_BRANCH_NAME }}") || true
-        if [[ ! -z "$OPENCV_EXTRA_FORK" ]]; then
-          echo "Merge opencv_extra with ${{ env.SOURCE_BRANCH_NAME }} branch"
-          cd /opencv_extra
-          git config user.email "opencv.ci"
-          git config user.name "opencv.ci"
-          git pull -v "https://github.com/${{ env.PR_AUTHOR }}/opencv_extra" "${{ env.SOURCE_BRANCH_NAME }}"
-        else
-          echo "No merge since ${{ env.PR_AUTHOR }}/opencv_extra does not have branch ${{ env.SOURCE_BRANCH_NAME }}"
-        fi
-    - name: Configure OpenCV
-      run: |
-        cd /opencv-build
-        cmake -G Ninja ${{ env.EXTRA_CMAKE_OPTIONS }} ${{ env.OPENCV_DOCKER_WORKDIR }}
-    - name: Build OpenCV
-      run: |
-        cd /opencv-build
-        ninja
-    - name: Accuracy:calib3d
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_calib3d
-    - name: Accuracy:core
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_core
-    - name: Accuracy:dnn
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_dnn
-    - name: Accuracy:features2d
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_features2d
-    - name: Accuracy:flann
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_flann
-    - name: Accuracy:gapi
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_gapi
-    - name: Accuracy:highgui
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_highgui
-    - name: Accuracy:imgcodecs
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_imgcodecs
-    - name: Accuracy:imgproc
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_imgproc
-    - name: Accuracy:ml
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_ml
-    - name: Accuracy:objdetect
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_objdetect
-    - name: Accuracy:photo
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_photo
-    - name: Accuracy:stitching
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_stitching
-    - name: Accuracy:video
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_video
-    - name: Accuracy:videoio
-      run: cd /opencv-build && xvfb-run -a bin/opencv_test_videoio
-    - name: Performance:calib3d
-      run: cd /opencv-build && xvfb-run -a bin/opencv_perf_calib3d --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1
-    - name: Performance:core
-      run: cd /opencv-build && xvfb-run -a bin/opencv_perf_core --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1
-    - name: Performance:dnn
-      run: cd /opencv-build && xvfb-run -a bin/opencv_perf_dnn --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1
-    - name: Performance:features2d
-      run: cd /opencv-build && xvfb-run -a bin/opencv_perf_features2d --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1
-    - name: Performance:gapi
-      run: cd /opencv-build && xvfb-run -a bin/opencv_perf_gapi --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1
-    - name: Performance:imgcodecs
-      run: cd /opencv-build && xvfb-run -a bin/opencv_perf_imgcodecs --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1
-    - name: Performance:imgproc
-      run: cd /opencv-build && xvfb-run -a bin/opencv_perf_imgproc --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1
-    - name: Performance:objdetect
-      run: cd /opencv-build && xvfb-run -a bin/opencv_perf_objdetect --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1
-    - name: Performance:photo
-      run: cd /opencv-build && xvfb-run -a bin/opencv_perf_photo --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1
-    - name: Performance:stitching
-      run: cd /opencv-build && xvfb-run -a bin/opencv_perf_stitching --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1
-    - name: Performance:video
-      run: cd /opencv-build && xvfb-run -a bin/opencv_perf_video --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1
-    - name: Performance:videoio
-      run: cd /opencv-build && xvfb-run -a bin/opencv_perf_videoio --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1
-    - name: Python3
-      run: |
-        cd ${{ env.OPENCV_DOCKER_WORKDIR }}/modules/python/test
-        python3 ./test.py --repo ../../../ -v
-    - name: Java
-      run: cd /opencv-build && xvfb-run -a python3 ${{ env.OPENCV_DOCKER_WORKDIR }}/modules/ts/misc/run.py . -a -t java
-    - name: Save Unit Test Results
-      uses: actions/upload-artifact@v3
-      if: always()
-      with:
-        name: junit-html
-        path: /opencv-build/java_test/testResults/junit-noframes.html
-    - name: Pylint
-      run: cd /opencv-build && cmake --build . --config release --target check_pylint -- -j4
-
-  BuildContrib:
-    runs-on: opencv-cn-lin-x86-64
-    defaults:
-      run:
-        shell: bash
-    container:
-      image: quay.io/asenyaev/opencv-ubuntu:20.04
-      volumes:
-        - /home/opencv-cn/git_cache:/home/ci/git_cache
-        - /home/opencv-cn/ci_cache/opencv:/home/ci/.ccache
-        - /home/opencv-cn/binaries_cache:/home/ci/binaries_cache
-    steps:
-    - name: PR info
-      run: |
-        echo "PR Author: ${{ env.PR_AUTHOR }}"
-        echo "Source branch name: ${{ env.SOURCE_BRANCH_NAME }}"
-        echo "Target branch name: ${{ env.TARGET_BRANCH_NAME }}"
-    - name: Clean
-      run: find ${{ env.OPENCV_DOCKER_WORKDIR }} -mindepth 1 -delete
-    - name: Fetch opencv
-      run: git clone --branch ${{ env.TARGET_BRANCH_NAME }} --reference ${{ env.GIT_CACHE_DOCKER }}/opencv.git https://github.com/opencv/opencv.git ${{ env.OPENCV_DOCKER_WORKDIR }}
-    - name: Merge opencv with a test branch
-      run: |
-        cd ${{ env.OPENCV_DOCKER_WORKDIR }}
-        git config --global --add safe.directory ${{ env.OPENCV_DOCKER_WORKDIR }}
-        git config user.email "opencv.ci"
-        git config user.name "opencv.ci"
-        git pull -v "https://github.com/${{ env.PR_AUTHOR_FORK }}" "${{ env.SOURCE_BRANCH_NAME }}"
-    - name: Clone opencv_contrib
-      run: git clone --single-branch --branch ${{ env.TARGET_BRANCH_NAME }} https://github.com/opencv/opencv_contrib.git /opencv_contrib
-    - name: Merge opencv_contrib with ${{ env.SOURCE_BRANCH_NAME }} branch
-      run: |
-        OPENCV_CONTRIB_FORK=$(git ls-remote --heads "https://github.com/${{ env.PR_AUTHOR }}/opencv_contrib" "${{ env.SOURCE_BRANCH_NAME }}") || true
-        if [[ ! -z "$OPENCV_CONTRIB_FORK" ]]; then
-          echo "Merge opencv_contrib with ${{ env.SOURCE_BRANCH_NAME }} branch"
-          cd /opencv_contrib
-          git config user.email "opencv.ci"
-          git config user.name "opencv.ci"
-          git pull -v "https://github.com/${{ env.PR_AUTHOR }}/opencv_contrib" "${{ env.SOURCE_BRANCH_NAME }}"
-        else
-          echo "No merge since ${{ env.PR_AUTHOR }}/opencv_contrib does not have branch ${{ env.SOURCE_BRANCH_NAME }}"
-        fi
-    - name: Configure OpenCV Contrib
-      run: |
-        cd /opencv-contrib-build
-        cmake -G Ninja ${{ env.EXTRA_CMAKE_OPTIONS }} -DOPENCV_EXTRA_MODULES_PATH=/opencv_contrib/modules ${{ env.OPENCV_DOCKER_WORKDIR }}
-    - name: Build OpenCV Contrib
-      run: |
-        cd /opencv-contrib-build
-        ninja
diff --git a/.github/workflows/PR-4.x-W10.yaml b/.github/workflows/PR-4.x-W10.yaml
deleted file mode 100644
index 8ebd8c782e..0000000000
--- a/.github/workflows/PR-4.x-W10.yaml
+++ /dev/null
@@ -1,176 +0,0 @@
-name: PR:4.x W10
-
-on:
-  pull_request:
-    branches:
-      - 4.x
-
-env:
-  EXTRA_CMAKE_OPTIONS: '-DCL_Z_OPTION=/Z7 -DOPENCV_DOWNLOAD_PATH=%BINARIES_CACHE% -DBUILD_EXAMPLES=ON -DOPENCV_ENABLE_NONFREE=ON -DCMAKE_BUILD_TYPE=Release'
-  OPENCV_TEST_DATA_PATH: ${{ github.workspace }}\opencv_extra\testdata
-  PR_AUTHOR: ${{ github.event.pull_request.user.login }}
-  PR_AUTHOR_FORK: ${{ github.event.pull_request.head.repo.full_name }}
-  SOURCE_BRANCH_NAME: ${{ github.head_ref }}
-  TARGET_BRANCH_NAME: ${{ github.base_ref }}
-  GTEST_FILTER_STRING: '-Samples.findFile:videoio/videocapture_acceleration.read/122:videoio/videocapture_acceleration.read/126'
-
-jobs:
-  BuildAndTest:
-    runs-on: opencv-cn-win
-    defaults:
-      run:
-        shell: cmd
-    steps:
-    - name: PR info
-      run: |
-        echo "PR Author: ${{ env.PR_AUTHOR }}"
-        echo "Source branch name: ${{ env.SOURCE_BRANCH_NAME }}"
-        echo "Target branch name: ${{ env.TARGET_BRANCH_NAME }}"
-    - name: Clean
-      run: cd ${{ github.workspace }} && rm -rf *
-    - name: Fetch opencv
-      run: cd ${{ github.workspace }} && git clone --branch ${{ env.TARGET_BRANCH_NAME }} --reference %GIT_CACHE%\opencv.git git@github.com:opencv/opencv.git
-    - name: Merge opencv with ${{ env.SOURCE_BRANCH_NAME }} branch
-      run: |
-        cd ${{ github.workspace }}\opencv
-        git config user.email "opencv.ci"
-        git config user.name "opencv.ci"
-        git pull -v "git@github.com:${{ env.PR_AUTHOR_FORK }}" "${{ env.SOURCE_BRANCH_NAME }}"
-    - name: Fetch opencv_extra
-      run: cd ${{ github.workspace }} && git clone --single-branch --branch ${{ env.TARGET_BRANCH_NAME }} --reference %GIT_CACHE%\opencv_extra.git git@github.com:opencv/opencv_extra.git
-    - name: Merge opencv_extra with ${{ env.SOURCE_BRANCH_NAME }} branch
-      shell: bash
-      run: |
-        OPENCV_EXTRA_FORK=$(git ls-remote --heads "git@github.com:/${{ env.PR_AUTHOR }}/opencv_extra" "${{ env.SOURCE_BRANCH_NAME }}") || true
-        if [[ ! -z "$OPENCV_EXTRA_FORK" ]]; then
-          echo "Merge opencv_extra with ${{ env.SOURCE_BRANCH_NAME }} branch"
-          cd opencv_extra
-          git config user.email "opencv.ci"
-          git config user.name "opencv.ci"
-          git pull -v "git@github.com:${{ env.PR_AUTHOR }}/opencv_extra" "${{ env.SOURCE_BRANCH_NAME }}"
-        else
-          echo "No merge since ${{ env.PR_AUTHOR }}/opencv_extra does not have branch ${{ env.SOURCE_BRANCH_NAME }}"
-        fi
-    - name: Configure OpenCV
-      run: |
-        mkdir ${{ github.workspace }}\opencv-build && cd ${{ github.workspace }}\opencv-build
-        call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars64.bat"
-        cmake -G Ninja ${{ env.EXTRA_CMAKE_OPTIONS }} ${{ github.workspace }}\opencv
-    - name: Build OpenCV
-      run: |
-        cd ${{ github.workspace }}\opencv-build
-        call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars64.bat"
-        ninja
-    - name: Accuracy:calib3d
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_test_calib3d.exe --skip_unstable --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Accuracy:core
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_test_core.exe --skip_unstable --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Accuracy:dnn
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_test_dnn.exe --skip_unstable --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Accuracy:features2d
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_test_features2d.exe --skip_unstable --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Accuracy:flann
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_test_flann.exe --skip_unstable --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Accuracy:gapi
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_test_gapi.exe --skip_unstable --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Accuracy:highgui
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_test_highgui.exe --skip_unstable --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Accuracy:imgcodecs
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_test_imgcodecs.exe --skip_unstable --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Accuracy:imgproc
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_test_imgproc.exe --skip_unstable --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Accuracy:ml
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_test_ml.exe --skip_unstable --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Accuracy:objdetect
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_test_objdetect.exe --skip_unstable --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Accuracy:photo
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_test_photo.exe --skip_unstable --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Accuracy:stitching
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_test_stitching.exe --skip_unstable --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Accuracy:video
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_test_video.exe --skip_unstable --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Accuracy:videoio
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_test_videoio.exe --skip_unstable --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Performance:calib3d
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_perf_calib3d.exe --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1 --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Performance:core
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_perf_core.exe --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1 --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Performance:dnn
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_perf_dnn.exe --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1 --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Performance:features2d
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_perf_features2d.exe --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1 --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Performance:gapi
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_perf_gapi.exe --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1 --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Performance:imgcodecs
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_perf_imgcodecs.exe --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1 --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Performance:imgproc
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_perf_imgproc.exe --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1 --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Performance:objdetect
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_perf_objdetect.exe --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1 --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Performance:photo
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_perf_photo.exe --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1 --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Performance:stitching
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_perf_stitching.exe --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1 --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Performance:video
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_perf_video.exe --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1 --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Performance:videoio
-      run: cd ${{ github.workspace }}\opencv-build && bin\opencv_perf_videoio.exe --perf_impl=plain --perf_min_samples=1 --perf_force_samples=1 --perf_verify_sanity --skip_unstable=1 --gtest_filter=${{ env.GTEST_FILTER_STRING }}
-    - name: Python3
-      run: |
-        cd ${{ github.workspace }}\opencv\modules\python\test
-        set PYTHONPATH=%PYTHONPATH%;${{ github.workspace }}\opencv-build\python_loader;${{ github.workspace }}\opencv-build\lib\python3
-        set PATH=%PATH%;${{ github.workspace }}\opencv-build\bin;${{ github.workspace }}\opencv-build\lib\python3
-        python test.py --repo ..\..\..\ -v
-    - name: Java
-      run: |
-        cd ${{ github.workspace }}\opencv-build
-        set PATH=%PATH%;${{ github.workspace }}\opencv-build\bin
-        ${{ github.workspace }}\opencv\modules\ts\misc\run.py . -a -t java
-
-
-  BuildContrib:
-    runs-on: opencv-cn-win
-    defaults:
-      run:
-        shell: cmd
-    steps:
-    - name: PR info
-      run: |
-        echo "PR Author: ${{ env.PR_AUTHOR }}"
-        echo "Source branch name: ${{ env.SOURCE_BRANCH_NAME }}"
-        echo "Target branch name: ${{ env.TARGET_BRANCH_NAME }}"
-    - name: Clean
-      run: cd ${{ github.workspace }} && rm -rf *
-    - name: Fetch opencv
-      run: cd ${{ github.workspace }} && git clone --branch ${{ env.TARGET_BRANCH_NAME }} --reference %GIT_CACHE%\opencv.git git@github.com:opencv/opencv.git
-    - name: Merge opencv with ${{ env.SOURCE_BRANCH_NAME }} branch
-      run: |
-        cd ${{ github.workspace }}\opencv
-        git config user.email "opencv.ci"
-        git config user.name "opencv.ci"
-        git pull -v "git@github.com:${{ env.PR_AUTHOR_FORK }}" "${{ env.SOURCE_BRANCH_NAME }}"
-    - name: Fetch opencv_contrib
-      run: cd ${{ github.workspace }} && git clone --single-branch --branch ${{ env.TARGET_BRANCH_NAME }} --reference %GIT_CACHE%\opencv_contrib.git --depth 1 git@github.com:opencv/opencv_contrib.git
-    - name: Merge opencv_contrib with ${{ env.SOURCE_BRANCH_NAME }} branch
-      shell: bash
-      run: |
-        OPENCV_CONTRIB_FORK=$(git ls-remote --heads "git@github.com:${{ env.PR_AUTHOR }}/opencv_contrib" "${{ env.SOURCE_BRANCH_NAME }}") || true
-        if [[ ! -z "$OPENCV_CONTRIB_FORK" ]]; then
-          echo "Merge opencv_contrib with ${{ env.SOURCE_BRANCH_NAME }} branch"
-          cd /opencv_contrib
-          git config user.email "opencv.ci"
-          git config user.name "opencv.ci"
-          git pull -v "git@github.com:${{ env.PR_AUTHOR }}/opencv_contrib" "${{ env.SOURCE_BRANCH_NAME }}"
-        else
-          echo "No merge since ${{ env.PR_AUTHOR }}/opencv_contrib does not have branch ${{ env.SOURCE_BRANCH_NAME }}"
-        fi
-    - name: Configure OpenCV Contrib
-      run: |
-        mkdir ${{ github.workspace }}\opencv-contrib-build && cd ${{ github.workspace }}\opencv-contrib-build
-        call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars64.bat"
-        cmake -G Ninja ${{ env.EXTRA_CMAKE_OPTIONS }} -DOPENCV_EXTRA_MODULES_PATH=${{ github.workspace }}\opencv_contrib\modules ${{ github.workspace }}\opencv
-    - name: Build OpenCV Contrib
-      run: |
-        cd ${{ github.workspace }}\opencv-contrib-build
-        call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars64.bat"
-        ninja
diff --git a/.github/workflows/PR-4.x.yaml b/.github/workflows/PR-4.x.yaml
new file mode 100644
index 0000000000..980bf753de
--- /dev/null
+++ b/.github/workflows/PR-4.x.yaml
@@ -0,0 +1,19 @@
+name: PR:4.x
+
+on:
+  pull_request:
+    branches:
+      - 4.x
+
+jobs:
+  ARM64:
+    uses: opencv/ci-gha-workflow/.github/workflows/OCV-PR-4.x-ARM64.yaml@main
+
+  U20:
+    uses: opencv/ci-gha-workflow/.github/workflows/OCV-PR-4.x-U20.yaml@main
+
+  W10:
+    uses: opencv/ci-gha-workflow/.github/workflows/OCV-PR-4.x-W10.yaml@main
+
+  TIM-VX:
+    uses: opencv/ci-gha-workflow/.github/workflows/OCV-timvx-backend-tests-4.x.yml@main
\ No newline at end of file
diff --git a/.github/workflows/timvx_backend_tests.yml b/.github/workflows/timvx_backend_tests.yml
deleted file mode 100644
index 5007a32755..0000000000
--- a/.github/workflows/timvx_backend_tests.yml
+++ /dev/null
@@ -1,101 +0,0 @@
-name: TIM-VX Backend
-
-on:
-  pull_request:
-    branches: [ 4.x ]
-    types: [ labeled, opened, synchronize, reopened ]
-
-env:
-  PR_AUTHOR: ${{ github.event.pull_request.user.login }}
-  PR_AUTHOR_FORK: ${{ github.event.pull_request.head.repo.full_name }}
-  SOURCE_BRANCH_NAME: ${{ github.head_ref }}
-  TARGET_BRANCH_NAME: ${{ github.base_ref }}
-
-jobs:
-  x86-simulator-build-test:
-    runs-on: ubuntu-20.04
-    # Docker image from https://hub.docker.com/r/yuentau/ocv_ubuntu
-    container: docker.io/yuentau/ocv_ubuntu:20.04
-    steps:
-      - name: info
-        run: |
-          echo "PR Author: ${{ env.PR_AUTHOR }}"
-          echo "Source branch name: ${{ env.SOURCE_BRANCH_NAME }}"
-          echo "Target branch name: ${{ env.TARGET_BRANCH_NAME }}"
-      - name: clean
-        shell: bash
-        run: find . -mindepth 1 -delete
-      - name: fetch opencv
-        uses: actions/checkout@v3
-        with:
-          repository: opencv/opencv
-          ref: ${{ env.TARGET_BRANCH_NAME }}
-          fetch-depth: 0
-          path: opencv
-      - name: merge opencv with test branch
-        shell: bash
-        run: |
-          cd opencv
-          git config user.email "opencv.ci"
-          git config user.name "opencv.ci"
-          git pull -v "https://github.com/${{ env.PR_AUTHOR_FORK }}" "${{ env.SOURCE_BRANCH_NAME }}"
-      - name: configure
-        run: |
-          cmake -B build -DWITH_TIMVX=ON -DCMAKE_INSTALL_PREFIX=./install -DBUILD_SHARED_LIBS=ON -DBUILD_PERF_TESTS=ON -DBUILD_TESTS=ON -DBUILD_EXAMPLES=OFF -DBUILD_DOCS=OFF -DWITH_OPENCL=OFF opencv
-      - name: build
-        run: cmake --build build --target install -j $(nproc)
-
-  khadas-vim3-tests:
-    if: contains(github.event.pull_request.labels.*.name, 'category:dnn_timvx')
-    concurrency:
-      group: khadas-vim3
-      cancel-in-progress: false
-    runs-on: [self-hosted, Linux, ARM64, khadas-vim3]
-    steps:
-      - name: info
-        run: |
-          echo "PR Author: ${{ env.PR_AUTHOR }}"
-          echo "Source branch name: ${{ env.SOURCE_BRANCH_NAME }}"
-          echo "Target branch name: ${{ env.TARGET_BRANCH_NAME }}"
-      - name: clean
-        shell: bash
-        run: find . -mindepth 1 -delete
-      - name: fetch opencv
-        uses: actions/checkout@v3
-        with:
-          repository: opencv/opencv
-          ref: ${{ env.TARGET_BRANCH_NAME }}
-          fetch-depth: 0
-          path: opencv
-      - name: merge opencv with test branch
-        shell: bash
-        run: |
-          cd opencv
-          git config user.email "opencv.ci"
-          git config user.name "opencv.ci"
-          git pull -v "https://github.com/${{ env.PR_AUTHOR_FORK }}" "${{ env.SOURCE_BRANCH_NAME }}"
-      - name: fetch opencv_extra
-        uses: actions/checkout@v3
-        with:
-          repository: opencv/opencv_extra
-          path: opencv_extra
-      - name: merge opencv_extra with test branch
-        shell: bash
-        run: |
-          RET=$(git ls-remote --heads "https://github.com/${{ env.PR_AUTHOR }}/opencv_extra" "${{ env.SOURCE_BRANCH_NAME }}") || true
-          if [[ ! -z "$RET" ]]; then
-            cd opencv_extra
-            git config user.email "opencv.ci"
-            git config user.name "opencv.ci"
-            git pull -v "https://github.com/${{ env.PR_AUTHOR }}/opencv_extra" "${{ env.SOURCE_BRANCH_NAME }}"
-          else
-            echo "no merge since ${{ env.PR_AUTHOR }}/opencv_extra does not have branch ${{ env.SOURCE_BRANCH_NAME }}"
-          fi
-      - name: configure
-        run: |
-          cmake -B build -D CMAKE_BUILD_TYPE=RELEASE -DCMAKE_INSTALL_PREFIX=./install -DWITH_TIMVX=ON -DWITH_OPENCL=OFF -DWITH_EIGEN=OFF opencv
-      - name: build
-        run: cmake --build build --target opencv_test_dnn -j 4
-      - name: unit tests for int8 layers
-        run: |
-          OPENCV_TEST_DATA_PATH=./opencv_extra/testdata ./build/bin/opencv_test_dnn --gtest_filter="Test_Int8_layers.*/1"