无效的 MEX 文件错误 CascadeClassifier_.mexmaci64、libopencv_ocl.2.4.dylib答案

【问题标题】：Invalid MEX-file error CascadeClassifier_.mexmaci64, libopencv_ocl.2.4.dylib无效的 MEX 文件错误 CascadeClassifier_.mexmaci64、libopencv_ocl.2.4.dylib
【发布时间】：2015-02-18 02:52:44
【问题描述】：

我在 OSX 10.10 上。我正在尝试运行使用以下库和程序的项目演示：

MATLAB R2014b 64 位。
OpenCV 2.4.10.1 通过 Homebrew 安装。
VLFeat 0.9.20。
mexopencv.

我在 MATLAB 中运行了 mex -setup，它将编译器设置为 clang。

MATLAB 的startup.m 文件中添加了 VLFeat 和 mexopencv 的路径。

当我尝试运行 demo_test.m 文件时，我在 MATLAB 中收到以下错误：

Invalid MEX-file '/Users/maverick/Documents/Project/mexopencv-master/+cv/private/CascadeClassifier_.mexmaci64':
dlopen(/Users/maverick/Documents/Project/mexopencv-master/+cv/private/CascadeClassifier_.mexmaci64, 6): Symbol not found:
__ZN2cv3ocl12getOclMatRefERKNS_11_InputArrayE
  Referenced from: /usr/local/lib/libopencv_superres.2.4.dylib
  Expected in: /Applications/MATLAB_R2014b.app/bin/maci64/libopencv_ocl.2.4.dylib
 in /usr/local/lib/libopencv_superres.2.4.dylib

Error in cv.CascadeClassifier (line 33)
            this.id = CascadeClassifier_(filename);

Error in faceAlign (line 8)
    detector = cv.CascadeClassifier('haarcascade_frontalface_alt2.xml');


Error in regressionFit (line 11)
            [shape, rat, ~, init_s] = faceAlign(img, [], [], R{round_number}, b{round_number}, [], pad, [1:66], 0);


Error in demo_test (line 16)
shape = regressionFit(img, [], R, b);

我知道该项目有效，因为我已在另一台计算机上尝试过。如何解决此错误并让项目运行？谢谢。

编辑 1：
这是我运行 otool -L（相当于 ldd）时的输出...

    $ otool -L /Applications/MATLAB_R2014b.app/bin/maci64/libopencv_ocl.2.4.dylib

/Applications/MATLAB_R2014b.app/bin/maci64/libopencv_ocl.2.4.dylib:
    @rpath/libopencv_ocl.2.4.dylib (compatibility version 2.4.0, current version 2.4.5)
    @rpath/libopencv_core.2.4.dylib (compatibility version 2.4.0, current version 2.4.5)
    @rpath/libopencv_imgproc.2.4.dylib (compatibility version 2.4.0, current version 2.4.5)
    @rpath/libopencv_objdetect.2.4.dylib (compatibility version 2.4.0, current version 2.4.5)
    @rpath/libtbb.dylib (compatibility version 0.0.0, current version 0.0.0)
    /System/Library/Frameworks/OpenCL.framework/Versions/A/OpenCL (compatibility version 1.0.0, current version 1.0.0)
    /usr/lib/libstdc++.6.dylib (compatibility version 7.0.0, current version 52.0.0)
    /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 159.1.0)

编辑 2：这是 otool -L 在 CascadeClassifier_.mexmaci64 上的输出

$ otool -L Documents/Project/mexopencv-master/+cv/private/CascadeClassifier_.mexmaci64
Documents/Project/mexopencv-master/+cv/private/CascadeClassifier_.mexmaci64:
    /System/Library/Frameworks/Cocoa.framework/Versions/A/Cocoa (compatibility version 1.0.0, current version 20.0.0)
    /usr/local/lib/libopencv_calib3d.2.4.dylib (compatibility version 2.4.0, current version 2.4.10)
    /usr/local/lib/libopencv_contrib.2.4.dylib (compatibility version 2.4.0, current version 2.4.10)
    /usr/local/lib/libopencv_core.2.4.dylib (compatibility version 2.4.0, current version 2.4.10)
    /usr/local/lib/libopencv_features2d.2.4.dylib (compatibility version 2.4.0, current version 2.4.10)
    /usr/local/lib/libopencv_flann.2.4.dylib (compatibility version 2.4.0, current version 2.4.10)
    /usr/local/lib/libopencv_gpu.2.4.dylib (compatibility version 2.4.0, current version 2.4.10)
    /usr/local/lib/libopencv_highgui.2.4.dylib (compatibility version 2.4.0, current version 2.4.10)
    /usr/local/lib/libopencv_imgproc.2.4.dylib (compatibility version 2.4.0, current version 2.4.10)
    /usr/local/lib/libopencv_legacy.2.4.dylib (compatibility version 2.4.0, current version 2.4.10)
    /usr/local/lib/libopencv_ml.2.4.dylib (compatibility version 2.4.0, current version 2.4.10)
    /usr/local/lib/libopencv_nonfree.2.4.dylib (compatibility version 2.4.0, current version 2.4.10)
    /usr/local/lib/libopencv_objdetect.2.4.dylib (compatibility version 2.4.0, current version 2.4.10)
    /usr/local/lib/libopencv_ocl.2.4.dylib (compatibility version 2.4.0, current version 2.4.10)
    /usr/local/lib/libopencv_photo.2.4.dylib (compatibility version 2.4.0, current version 2.4.10)
    /usr/local/lib/libopencv_stitching.2.4.dylib (compatibility version 2.4.0, current version 2.4.10)
    /usr/local/lib/libopencv_superres.2.4.dylib (compatibility version 2.4.0, current version 2.4.10)
    /usr/local/lib/libopencv_video.2.4.dylib (compatibility version 2.4.0, current version 2.4.10)
    /usr/local/lib/libopencv_videostab.2.4.dylib (compatibility version 2.4.0, current version 2.4.10)
    @rpath/libmx.dylib (compatibility version 0.0.0, current version 0.0.0)
    @rpath/libmex.dylib (compatibility version 0.0.0, current version 0.0.0)
    @rpath/libmat.dylib (compatibility version 0.0.0, current version 0.0.0)
    /usr/lib/libc++.1.dylib (compatibility version 1.0.0, current version 120.0.0)
    /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1197.1.1)

我错过了一些图书馆吗？ PATH 配置不正确吗？

【问题讨论】：

显然缺少此符号 __ZN2cv3ocl12getOclMatRefERKNS_11_InputArrayE。可能是 dylib 丢失或路径不正确。
寻找 opencv ocl 库。但一般情况下，如果 MATLAB 并设置 LD_RUN_PATH，您可以在外部运行 ldd mexfilw.asdf。
@chappjc : 我从 Homebrew 安装了 OpenCV 库
@no10downingstreet 这并不意味着 mex 文件可以找到它。自己找文件
@chappjc ：我没听懂你说的，抱歉。我在 OSX 上。 ldd 在 Linux 上运行。能否请您详细说明一下，我是新手。

标签： macos matlab opencv shared-libraries mex

【解决方案1】：

Matlab 捆绑了自己的计算机视觉库。因此，即使您安装了 OpenCV，它也会尝试先使用它们。

解决方案是将这些捆绑的库移动到另一个文件夹（以便在出现问题时进行备份），然后将实际的 OpenCV 库符号链接到捆绑库先前填充的位置。

如果在执行此操作后出现任何错误，则可能是因为 Matlab 再次使用了自己的库。对这个库再次执行相同的过程。

【讨论】：