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[Proposal] Adds precision, recall, and F1 score to evaluate detections #4644

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@danielgural danielgural commented Aug 8, 2024

What changes are proposed in this pull request?

Adds precision, recall, and f1-score to samples and frames after running evaluate_detections().

How is this patch tested? If it is not, please explain why.

import fiftyone as fo
import fiftyone.zoo as foz

dataset = foz.load_zoo_dataset("quickstart")
results = dataset.evaluate_detections(
    "predictions,
    gt_field="ground_truth",
    eval_key="test_f1",
    compute_mAP=True,
)

Release Notes

Is this a user-facing change that should be mentioned in the release notes?

  • No. You can skip the rest of this section.
  • Yes. Give a description of this change to be included in the release
    notes for FiftyOne users.

(Details in 1-2 sentences. You can just refer to another PR with a description
if this PR is part of a larger change.)

What areas of FiftyOne does this PR affect?

  • App: FiftyOne application changes
  • Build: Build and test infrastructure changes
  • [ X] Core: Core fiftyone Python library changes
  • Documentation: FiftyOne documentation changes
  • Other

Summary by CodeRabbit

  • New Features

    • Enhanced detection evaluation with precision, recall, and F1-score metrics.
    • Updated documentation to reflect new metrics included in evaluation results.
  • Bug Fixes

    • Implemented checks to avoid division by zero in metric calculations.
  • Documentation

    • Improved docstring to clarify the inclusion of new metrics in the evaluation process.

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coderabbitai bot commented Aug 8, 2024

Walkthrough

The changes enhance the evaluate_detections function in the detection evaluation module, allowing for the calculation and storage of precision, recall, and F1-score metrics. Alongside existing true positive, false positive, and false negative counts, these new metrics improve the granularity of performance assessments for detection tasks, enriching both the documentation and the underlying functionality.

Changes

Files Change Summary
fiftyone/utils/eval/detection.py Enhanced evaluate_detections function to calculate precision, recall, and F1-score; updated documentation, field registrations, and methods for processing new metrics.

Poem

In fields of data, we hop and play,
Metrics of precision brighten our day!
With recall and F1, our scores take flight,
Evaluating detections, all feels just right.
A bunny's delight, as stats dance and twirl,
In the world of evaluation, we joyfully whirl! 🐰✨


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Actionable comments posted: 0

Review details

Configuration used: .coderabbit.yaml
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Commits

Files that changed from the base of the PR and between 6380d25 and eb19786.

Files selected for processing (1)
  • fiftyone/utils/eval/detection.py (8 hunks)
Additional comments not posted (7)
fiftyone/utils/eval/detection.py (7)

82-100: Docstring update for new metrics looks good.

The docstring has been updated to include precision, recall, and F1-score, which aligns with the new functionality.


191-193: Field names for new metrics are correctly defined.

The new fields for precision, recall, and F1-score are well-named and consistent with existing field naming conventions.


223-236: Correct calculation of precision, recall, and F1-score for frames.

The calculations for precision, recall, and F1-score are correctly implemented with checks to avoid division by zero.


243-256: Correct calculation of precision, recall, and F1-score for samples.

The calculations for precision, recall, and F1-score are correctly implemented with checks to avoid division by zero.


353-370: Registration of new fields for precision, recall, and F1-score is correct.

The new fields are correctly registered for both samples and frames, ensuring they are integrated into the dataset schema.


Line range hint 480-501: Inclusion of new metrics in get_fields is correct.

The new metrics are correctly included in the field list, ensuring they are handled during data processing.


532-534: Cleanup process for new metrics is correctly implemented.

The new metrics are correctly included in the cleanup process, ensuring they are properly removed.

@brimoor brimoor changed the title Adds precision, recall, and f1 score to evaluate detections [Proposal] Adds precision, recall, and F1 score to evaluate detections Aug 8, 2024
@brimoor brimoor marked this pull request as draft August 8, 2024 21:14
@brimoor
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brimoor commented Aug 8, 2024

Documenting a discussion we had offline about this:

P/R/F1 are not net-new from a data model standpoint; they can be computed from existing fields as shown below.

That said, there's definitely some value to populating these fields if users prefer the ability to filter in the sidebar by P/R/F1 rather than raw counts. On the other hand, this adds to the number of fields + dataset size, especially if you're running multiple evaluations on one dataset.

Ultimately, since we're building a model evaluation panel that will directly expose the ability to plot + filter by P/R/F1, I'd suggest that we don't need to duplicate them on the dataset.

import numpy as np

import fiftyone as fo
import fiftyone.zoo as foz
from fiftyone import ViewField as F

dataset = foz.load_zoo_dataset("quickstart")
results = dataset.evaluate_detections("predictions", eval_key="eval")

print(results.report())

# Histograms

tp = np.array(dataset.values("eval_tp"))
fp = np.array(dataset.values("eval_fp"))
fn = np.array(dataset.values("eval_fn"))

p = tp / (tp + fp)
r = tp / (tp + fn)
f1 = 2 * (p x r) / (p + r)

# Callbacks

tp = F("eval_tp")
fp = F("eval_fp")
fn = F("eval_fn")

p = tp / (tp + fp)
r = tp / (tp + fn)
f1 = 2 * (p x r) / (p + r)

view1 = dataset.match((p > 0.1) & (p < 0.5))
view2 = dataset.match((r > 0.1) & (r < 0.5))
view3 = dataset.match((f1 > 0.1) & (f1 < 0.5))

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2 participants