VS2019:fatal error C1083 Cannot open header file: 'opencv.hpp'

Question

It is all fine when I was writing the code, that is, when I included the header file \"opencv2/opencv.hpp\",
and VS2019 can indeed \"see\" it,
in other words, I can use th

Answer 1

Actually there are most of the time possibility of missing "Additional include directory path" or wrongly setup.

Where to find in Visual Studio:

To set this compiler option in the Visual Studio development environment

1. Open the project's Property Pages dialog box. For details, see Set C++ compiler and build properties in Visual Studio.
2. Select the Configuration Properties > C/C++ > General property page.
3. Modify the Additional Include Directories property.

Visual Studio 2019 C++ Project configuration

Example project setup is described in below link: Example setup