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Export annotated images from SQLite to class-organized PNG folders

Source: R/database.R
export_db_to_png.Rd

Reads annotations for a single sample from the database and extracts PNG images from the ROI file, placing each image into a subfolder named after its assigned class.

Usage

export_db_to_png(db_path, sample_name, roi_path, png_folder, skip_class = NULL)

Arguments

db_path

Path to the SQLite database file

sample_name

Sample name

roi_path

Path to the .roi file for this sample

png_folder

Base output folder. Images are written to png_folder/<class_name>/

skip_class

Character vector of class names to exclude from export (e.g. "unclassified"). Default NULL exports all classes.

Value

TRUE on success, FALSE on failure

Examples

if (FALSE) { # \dontrun{
db_path <- get_db_path("/data/manual")
export_db_to_png(db_path, "D20230101T120000_IFCB134",
                 "/data/raw/2023/D20230101/D20230101T120000_IFCB134.roi",
                 "/data/png_output",
                 skip_class = "unclassified")
} # }