Failed to include esp-opencv with esp-idf framework

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1

I got the esspresif/opencv component in the folder managed_components and cmake recognizes it.
But it looks like there is a problem with the include search path, because I get

src/main.cpp:1:10: fatal error: opencv2/core.hpp: No such file or directory
    1 | #include <opencv2/core.hpp>

Meanwhile it tried a lot, but didn’t get it to work.

The pio environment:

[env:esp32cam]
platform = espressif32
board = esp32cam
framework = espidf

The idf_component.yml:

dependencies:
  idf:
    version: ">=4.1.0"
  espressif/opencv:
    version: "4.10.0~3"

Any hint is appreciated.