denseflow: CMake Error

Hi @innerlee , I follow your instruction to install denseflow, but there is a strange error when I run ./zzdenseflow.sh

denseflow will be installed in /home/liming/app
Dependency: boost, opencv
downloads/denseflow.tar.gz exist
CMake Error at CMakeLists.txt:19 (find_package):
  By not providing "FindOpenCV.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "OpenCV", but
  CMake did not find one.

  Could not find a package configuration file provided by "OpenCV" with any
  of the following names:

    OpenCVConfig.cmake
    opencv-config.cmake

  Add the installation prefix of "OpenCV" to CMAKE_PREFIX_PATH or set
  "OpenCV_DIR" to a directory containing one of the above files.  If "OpenCV"
  provides a separate development package or SDK, be sure it has been
  installed.


-- Configuring incomplete, errors occurred!
See also "/home/liming/app/src/denseflow/build/CMakeFiles/CMakeOutput.log".
See also "/home/liming/app/src/denseflow/build/CMakeFiles/CMakeError.log"