Delphi binding for OpenCV

• Experimental Delphi binding for OpenCV 4.10.0
• Development environment - Delphi 10.4, 11, 12
• x64 platform only

Contributors:

• Laentir Valetov (email: laex@bk.ru)

  What is completed (approximately)

  ---

• [ ] 10% - core. Core functionality
• [ ] 50% - imgproc. Image Processing
• [x] 100% - imgcodecs. Image file reading and writing
• [ ] videoio. Video I/O
• [x] 100% - highgui. High-level GUI
• [ ] 10% - video. Video Analysis
• [ ] 0% - calib3d. Camera Calibration and 3D Reconstruction
• [ ] 1% - features2d. 2D Features Framework
• [ ] 10% - objdetect. Object Detection
• [ ] 1% - dnn. Deep Neural Network module
• [ ] 0% - ml. Machine Learning
• [ ] 5% - flann. Clustering and Search in Multi-Dimensional Spaces
• [ ] 10% - photo. Computational Photography
• [ ] 30% - stitching. Images stitching
• [ ] 0% - gapi. Graph API

  Usage:

  ---

  1. Download the current state of the project in zip format or via git
  2. Download OpenCV 4.10.0, run and unpack to the selected directory (for example in <opencv>).

The following DLLs are required to work properly

• from <opencv>\build\x64\vc16\bin\ or from <delphi-opencv>\redist\opencv_delphi4100.zip

  • opencv_videoio_ffmpeg4100_64.dll - release
  • opencv_videoio_msmf4100_64.dll - release
  • opencv_videoio_msmf4100_64d.dll - debug
  • opencv_world4100.dll - release
  • opencv_world4100d.dll - debug

• from redist\opencv_delphi4100.zip**

  • opencv_delphi4100.dll - release
  • opencv_delphi4100d.dll - debug

For the library to work properly, you need

• place next to the executable file of your program (examples of usage from <delphi-opencv>\samples are compiled into <delphi-opencv>\bin)
  or
• to use in any projects for the x64 platform, you need to copy the dll files to C:\Windows\System32\.

[!WARNING] You may not have the Microsoft runtime libraries installed on your computer, which are required for OpenCV to work. Take advantage of the advice (source):

"The lack of these DLLs can be fixed by installing "Microsoft Visual C++ 2015 - 2022 Redistributable". Probably the application that is showing this error depends on it installed. Download and install both the x86 and x64 versions"

[!IMPORTANT] You can check the availability of the required libraries (dll) for running projects using the CheckCVDep.exe utility (<delphi-opencv>\cvCheckDep)

3. Set Delphi environment setting

Add the Library path for the modules of the project in Delphi IDE:
Tools-Options -> Language-Delphi-Library-"Windows 64-bit"-Library path add path <delphi-opencv>\source\ and <delphi-opencv>\packages

To run demo examples

1. Change the path in the OpenCVRootPath variable in the <delphi-opencv>\source\CVResource.pas module to the path to the unpacked OpenCV 4.10.0 library. This is only needed to run examples from samples.
2. Open <delphi-opencv>\samples\Samples.groupproj

To instal components

1. For components, install the packages from <delphi-opencv>\packages\<Delphi Version>\CVClassGroup.groupproj

2. Run demo from <delphi-opencv>\samples\Samples.groupproj

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