Question

我正在尝试减少ios的opencv2.framework大小。我的项目只使用core，imgproc和highgui模块。如何只使用那些模块进行编译？或者是否有减少尺寸的替代方案？

感谢。

Answer 1

我现在用版本3.1遇到了这个问题，而nebuto的答案很接近，但截至目前还不完整。通过更新build_framework.py文件，以下内容能够产生所需的结果。

def getCMakeArgs(self, arch, target):
    args = [
        "cmake",
        "-GXcode",
        "-DBUILD_SHARED_LIBS=OFF",
        "-DBUILD_opencv_core=ON",
        "-DBUILD_opencv_imgcodecs=OFF",
        "-DBUILD_opencv_imgproc=ON",
        "-DBUILD_opencv_world=OFF",
        "-DBUILD_opencv_gpu=OFF",
        "-DBUILD_opencv_calib3d=OFF",
        "-DBUILD_opencv_contrib=OFF",
        "-DBUILD_opencv_features2D=OFF",
        "-DBUILD_opencv_flann=OFF",
        "-DBUILD_opencv_highgui=ON",
        "-DBUILD_opencv_legacy=OFF",
        "-DBUILD_opencv_ml=OFF",
        "-DBUILD_opencv_nonfree=OFF",
        "-DBUILD_opencv_objdetect=OFF",
        "-DBUILD_opencv_photo=OFF",
        "-DBUILD_opencv_stitching=OFF",
        "-DBUILD_opencv_video=OFF",
        "-DBUILD_opencv_videoio=OFF",
        "-DBUILD_opencv_videostab=OFF",
        "-DAPPLE_FRAMEWORK=ON",
        "-DCMAKE_INSTALL_PREFIX=install",
        "-DCMAKE_BUILD_TYPE=Release",
    ]
    return args

此更新还包括两个似乎在2.4.6中不存在的新模块。

为了节省一些额外费用，您可以删除位于文件底部的模拟器版本的i386设置。如果您的应用程序是iOS 9及更高版本，并且您希望省略32位设备，您也可以取出armv7选项。

b = Builder(args.opencv, args.contrib,
    [
        ("armv7", "iPhoneOS"),
        ("armv7s", "iPhoneOS"),
        ("arm64", "iPhoneOS"),
        #("i386", "iPhoneSimulator"),
        ("x86_64", "iPhoneSimulator"),
    ])
b.build(args.out)

Answer 2

从v2.4.6开始，OpenCV有一个自定义的python脚本来简化工作（plateforms＆gt; ios＆gt; build_framework.py）

您只需在cmake行添加标志即可进行自定义编译。

例如：我只需要lib imgproc并将所有标题包含到存档中，我的cmake现在重新解析这个：

cmakeargs = ("-GXcode " +
            "-D BUILD_SHARED_LIBS=OFF "+
            "-D BUILD_opencv_core=ON "+
            "-D BUILD_opencv_imgproc=ON "+
            "-D BUILD_opencv_world=ON "+
            "-D BUILD_opencv_gpu=OFF "+
            "-D BUILD_opencv_calib3d=OFF "+
            "-D BUILD_opencv_contrib=OFF "+
            "-D BUILD_opencv_features2D=OFF "+
            "-D BUILD_opencv_flann=OFF "+
            "-D BUILD_opencv_highgui=OFF "+
            "-D BUILD_opencv_legacy=OFF "+
            "-D BUILD_opencv_ml=OFF "+
            "-D BUILD_opencv_nonfree=OFF "+
            "-D BUILD_opencv_objdetect=OFF "+
            "-D BUILD_opencv_photo=OFF "+
            "-D BUILD_opencv_stitching=OFF "+
            "-D BUILD_opencv_video=OFF "+
            "-D BUILD_opencv_videostab=OFF "+
            "-DCMAKE_BUILD_TYPE=Release " +
            "-DCMAKE_TOOLCHAIN_FILE=%s/platforms/ios/cmake/Toolchains/Toolchain-%s_Xcode.cmake " +
            "-DCMAKE_INSTALL_PREFIX=install") % (srcroot, target)

不要忘记添加核心和世界库，因为它们是强制性的。执行python脚本＆gt; profite。

之后，手动将lib添加到项目中，并删除标题中留下的讨厌的导入标题＆gt; opencv.hpp，你应该好好去！

Answer 3

只需从modules文件夹中删除模块，然后从头文件中删除包含行。并编译。在此之前，请阅读CMakeLists.txt以获取依赖项。

例如，对于highgui模块;

ocv_define_module(imgproc opencv_core)

Answer 4

从opencv 3.4.1开始，您现在可以使用BUILD_LIST arg来指定要构建的模块。与使用上述-BUILD_opencv_xxx=OFF方法的黑名单方法相比，这是一种白名单方法。

如果你想要的只是imgproc模块，那么你可以将构建脚本修改为：

def getCMakeArgs(self, arch, target):
    args = [
        "cmake",
        "-GXcode",
        "-DBUILD_LIST=imgproc"
        "-DAPPLE_FRAMEWORK=ON",
        "-DCMAKE_INSTALL_PREFIX=install",
        "-DCMAKE_BUILD_TYPE=Release",
    ]
    return args

虽然在实践中，这对我来说并不适合。我还必须手动排除highgui，imgcodecs和videoio：

def getCMakeArgs(self, arch, target):
    args = [
        "cmake",
        "-GXcode",
        "-DBUILD_LIST=imgproc"
        "-DBUILD_opencv_highgui=OFF",
        "-DBUILD_opencv_imgcodecs=OFF",
        "-DBUILD_opencv_videoio=OFF",
        "-DAPPLE_FRAMEWORK=ON",
        "-DCMAKE_INSTALL_PREFIX=install",
        "-DCMAKE_BUILD_TYPE=Release",
    ]
    return args

Opencv自定义编译

4 个答案: