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54 lines
1.4 KiB
Markdown
54 lines
1.4 KiB
Markdown
# Build configurations
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This doc details some build configurations possible.
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Images codecs support
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----------------------------
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To add/remove image codecs support, the following modifications are done.
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### PNG
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- Remove ``-DWITH_PNG=OFF`` and add ``-DBUILD_PNG=ON`` and ``-DBUILD_ZLIB=ON`` from the cmake command
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- The lib ``opencv_imgcodecs.a`` build pass
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The library is compiled in the ``3rdparty/`` folder. Copy this folder into the esp32 example project folder.
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### JPEG
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- Remove ``-DWITH_JPEG=OFF`` and add ``-DBUILD_JPEG=ON`` of the cmake command
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- Problem at compilation time. Doesn't support JPEG for now (TODO).
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## Additional OpenCV modules
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In addition to the `core`, `imgproc` and `imgcodecs` modules, the following were also tested:
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* `features2d`: The cross-compilation didn't cause issues. The following functionalities were used:
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* AKAZE features detector/descriptor
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* Matching method
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* `calib3d`: The cross-compilation didn't cause issues. The following functionalities were used:
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* undistortPoints method
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* findHomography method
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* projectPoints method
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These methods use `double` precision operations. Because the ESP32 only have a single precision Floating Point Unit (FPU), the operations are very slow. (TODO: have modified the methods to use only `float`, but must now add them to this repo).
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Parallel support
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-----------------------
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TODO
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