error: ‘convert_image’ was not declared in this scope convert_image(in, out)

[TengFeiHan0]

when compiling this whole project, I encountered an expected error.

tum_ardrone/build/thirdparty/src/thirdparty/libcvd/include/cvd/utility.h:40:17: error: ‘convert_image’ was not declared in this scope
    convert_image(in, out);
    ~~~~~~~~~~~~~^~~~~~~~~
CMakeFiles/drone_stateestimation.dir/build.make:326: recipe for target 'CMakeFiles/drone_stateestimation.dir/src/stateestimation/PTAM/KeyFrame.cc.o' failed
make[2]: *** [CMakeFiles/drone_stateestimation.dir/src/stateestimation/PTAM/KeyFrame.cc.o] Error 1
make[2]: *** Waiting for unfinished jobs....
CMakeFiles/Makefile2:108: recipe for target 'CMakeFiles/drone_stateestimation.dir/all' failed

this is not the first time to run these codes, but I got a surprising result at this time. hope someone could give little clues. Thank you in advance.