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mod common;
mod types;
pub use crate::types::*;
use crate::common::*;
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct Sample {
pub annotation: Annotation,
pub annotation_file: PathBuf,
pub image_file: PathBuf,
pub roi_dir: PathBuf,
pub roi_files: Vec<PathBuf>,
}
pub fn load(dataset_dir: impl AsRef<Path>) -> Result<Vec<Sample>> {
let dataset_dir = dataset_dir.as_ref();
let samples: Result<Vec<_>> = glob::glob(
dataset_dir
.join("**")
.join("*.xml")
.to_str()
.ok_or_else(|| format_err!("the path '{}' is not UTF-8", dataset_dir.display()))?,
)?
.map(|result| {
let annotation_file = result?;
let parent = annotation_file.parent().unwrap();
let name = annotation_file
.file_stem()
.unwrap()
.to_str()
.ok_or_else(|| format_err!("non-UTF-8 filename '{}'", annotation_file.display()))?;
let image_file = parent.join(format!("{}.jpg", name));
let roi_dir = parent.join(format!("{}_roi", name));
let annotation: Annotation = {
let content = fs::read_to_string(&annotation_file)
.with_context(|| format!("cannot open file '{}'", annotation_file.display()))?;
serde_xml_rs::from_str(&content)
.with_context(|| format!("failed to parse file '{}'", annotation_file.display()))?
};
let roi_files: Result<Vec<_>> = (1..=annotation.object.len())
.map(|index| {
let file_name = format!("{}.jpg", index);
let roi_file = roi_dir.join(&file_name);
ensure!(
roi_file.is_file(),
"the ROI file '{}' is missing",
roi_file.display()
);
Ok(roi_file)
})
.collect();
let roi_files = roi_files?;
Ok(Sample {
annotation,
annotation_file,
image_file,
roi_dir,
roi_files,
})
})
.collect();
let samples = samples?;
Ok(samples)
}