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Checklist ROAI 2026 National Stage, Grades 9–10 · Task 2

A matter of perspective

Find the odd image in triplets of object photographs and estimate the horizontal viewing angle of single images.

  • Vision
  • Image matching and viewpoint (angle) regression
Read the official statement

The task

A photographer takes pictures of museum artworks from several horizontal angles. The training folder contains images and a CSV giving the viewing angle of each image.

Subtask 1 gives triplets in which two images show the same object from different perspectives and one shows a different object; the odd image (1, 2 or 3) must be identified. Subtask 2 asks for the viewing angle (0–359) of each given image.

Abridged by SOTA from the official materials. The official statement has the exact rules, and it wins wherever this summary differs.

At a glance

You get
train_data folder (images and train_data.csv with angles); test_data folder (images and test_data.csv with subtaskID, datapointID, img1, img2, img3).
You submit
CSV with subtaskID, datapointID and answer (1–3 for subtask 1, an angle for subtask 2).
Scoring
Subtask 1 (40 points): accuracy. Subtask 2 (60 points): for each image, z = min(|x − y|, 360 − |x − y|) and the image earns max(0, 1 − z/90) of its share of the points.
Rules
  • On-site at Genesis College, Bucharest, through the Nitro Contestant Cloud
  • Only the packages listed in the round rules may be used
  • Only submissions selected by the contestant count towards the final ranking
Format
ROAI 2026 national stage, grades 9–10 section, 7 April 2026.

Statement

Competition

Details

Year
2026, Bucharest, Romania (Genesis College)
Round
National Stage, Grades 9–10 · Task 2
Language
English
License
Not stated by the source