Fix/opencv capture#2

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ArMourMag wants to merge 2 commits intoESROCOS:masterfrom

ArMourMag:fix/opencv_capture

Commits on Nov 13, 2019

Fix export pkgconfig function in CMake file.
ArMourMag
authored

Commits on Nov 21, 2019

Fix if error and check size of image.
ArMourMag
authored