@spec addSamplesDataSearchPath(binary()) :: :ok | {:error, String.t()}

Override search data path by adding new search location

Positional Arguments

• path: String.

  Path to used samples data

Use this only to override default behavior Passed paths are used in LIFO order.

Python prototype (for reference only):

addSamplesDataSearchPath(path) -> None

@spec addSamplesDataSearchSubDirectory(binary()) :: :ok | {:error, String.t()}

Append samples search data sub directory

Positional Arguments

• subdir: String.

  samples data sub directory

General usage is to add OpenCV modules name (<opencv_contrib>/modules/<name>/samples/data -> <name>/samples/data + modules/<name>/samples/data). Passed subdirectories are used in LIFO order.

Python prototype (for reference only):

addSamplesDataSearchSubDirectory(subdir) -> None

@spec findFile(binary()) :: binary() | {:error, String.t()}

Try to find requested data file

Positional Arguments

• relative_path: String.

  Relative path to data file

Keyword Arguments

• required: bool.

  Specify "file not found" handling. If true, function prints information message and raises cv::Exception. If false, function returns empty result

• silentMode: bool.

  Disables messages

Return

• retval: String

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 cv::utils::findDataFile @return Returns path (absolute or relative to the current directory) or empty string if file is not found

Python prototype (for reference only):

findFile(relative_path[, required[, silentMode]]) -> retval

@spec findFile(binary(), [{atom(), term()}, ...] | nil) ::
  binary() | {:error, String.t()}

Try to find requested data file

Positional Arguments

• relative_path: String.

  Relative path to data file

Keyword Arguments

• required: bool.

  Specify "file not found" handling. If true, function prints information message and raises cv::Exception. If false, function returns empty result

• silentMode: bool.

  Disables messages

Return

• retval: String

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 cv::utils::findDataFile @return Returns path (absolute or relative to the current directory) or empty string if file is not found

Python prototype (for reference only):

findFile(relative_path[, required[, silentMode]]) -> retval

@spec findFileOrKeep(binary()) :: binary() | {:error, String.t()}

findFileOrKeep

Positional Arguments

• relative_path: String

Keyword Arguments

• silentMode: bool.

Return

• retval: String

Python prototype (for reference only):

findFileOrKeep(relative_path[, silentMode]) -> retval

@spec findFileOrKeep(binary(), [{atom(), term()}, ...] | nil) ::
  binary() | {:error, String.t()}

findFileOrKeep

Positional Arguments

• relative_path: String

Keyword Arguments

• silentMode: bool.

Return

• retval: String

Python prototype (for reference only):

findFileOrKeep(relative_path[, silentMode]) -> retval