Struct PerImageTable 

pub struct PerImageTable {
    pub image_id: Vec<i64>,
    pub n_gt: Vec<u32>,
    pub n_dt: Vec<u32>,
    pub tp_at_50: Vec<u32>,
    pub fp_at_50: Vec<u32>,
    pub fn_at_50: Vec<u32>,
    pub tp_at_75: Vec<u32>,
    pub fp_at_75: Vec<u32>,
    pub fn_at_75: Vec<u32>,
    pub tp_mean_iou: Vec<u32>,
}

One row per image — rollup of locked-spine outputs across categories at area=ALL.

No ap / ap_50 columns (per-image AP is degenerate; see docs/explanation/why-no-per-image-ap.md).

Quirk G2 is honored automatically: a DT matched to a crowd GT carries dt_ignore=true, so TP/FP filters via !dt_ignore exclude it. Crowd GTs do not contribute to n_gt either (excluded by gt_ignore).

n_dt reflects the post-maxDets cap stored on the cells (typical COCO cap of 100 swallows nearly all images).

Fields

image_id: Vec<i64>

COCO image id, sourced from the dataset’s id-ascending image order (matching the grid’s I-axis ordering).

n_gt: Vec<u32>

Non-ignore GT count, summed across categories at area=ALL.

n_dt: Vec<u32>

DT count, summed across categories at area=ALL (post-maxDets; see struct doc).

tp_at_50: Vec<u32>

True positives at IoU=0.50 — DTs with dt_matched && !dt_ignore.

fp_at_50: Vec<u32>

False positives at IoU=0.50 — DTs with !dt_matched && !dt_ignore.

fn_at_50: Vec<u32>

False negatives at IoU=0.50 — n_gt - tp_at_50.

tp_at_75: Vec<u32>

True positives at IoU=0.75.

fp_at_75: Vec<u32>

False positives at IoU=0.75.

fn_at_75: Vec<u32>

False negatives at IoU=0.75.

tp_mean_iou: Vec<u32>

Mean true-positive count across the T-axis, floored.

Implementations

impl PerImageTable

pub const COLUMN_NAMES: &'static [&'static str]

Names of every column in pinned order. Matches the Arrow schema emitted by vernier-ffi.

pub fn len(&self) -> usize

Number of rows.

pub fn is_empty(&self) -> bool

True when no rows.

Trait Implementations

impl Clone for PerImageTable

fn clone(&self) -> PerImageTable

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for PerImageTable

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.