image_proc building error

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in ubuntu 16.04 kinetic ros git https://github.com/ros-perception/ima...

CMake Error at /usr/share/cmake-3.5/Modules/FindPkgConfig.cmake:367 (message):
  A required package was not found
Call Stack (most recent call first):
  /usr/share/cmake-3.5/Modules/FindPkgConfig.cmake:532 (_pkg_check_modules_internal)
  image_pipeline/image_view/CMakeLists.txt:42 (pkg_check_modules)


-- Configuring incomplete, errors occurred!
See also "/home/asd/image_pipelin/build/CMakeFiles/CMakeOutput.log".
See also "/home/asd/image_pipelin/build/CMakeFiles/CMakeError.log".
Invoking "cmake" failed