Function find_file 

pub fn find_file(
    relative_path: &str,
    required: bool,
    silent_mode: bool,
) -> Result<String>

Try to find requested data file

Search directories:

1. Directories passed via addSamplesDataSearchPath()
2. OPENCV_SAMPLES_DATA_PATH_HINT environment variable
3. OPENCV_SAMPLES_DATA_PATH environment variable If parameter value is not empty and nothing is found then stop searching.
4. Detects build/install path based on: a. current working directory (CWD) b. and/or binary module location (opencv_core/opencv_world, doesn’t work with static linkage)
5. Scan <source>/{,data,samples/data} directories if build directory is detected or the current directory is in source tree.
6. Scan <install>/share/OpenCV directory if install directory is detected.

See also

cv::utils::findDataFile

Parameters

• relative_path: Relative path to data file
• required: Specify “file not found” handling. If true, function prints information message and raises cv::Exception. If false, function returns empty result
• silentMode: Disables messages

Returns

Returns path (absolute or relative to the current directory) or empty string if file is not found

C++ default parameters

• required: true
• silent_mode: false