TRACKS

Six constructs

Each track has its own primary metric. Difficulty is factorial (size, contrast, clutter, cardinality), not vibes.

change_spot · 128

Find & localize differences. Primary [email protected]; secondary loose/center hit.

text_read · 126

Read in-image text. Size ladder 24→6px · en/zh/ja/ko/mixed · contrast.

text_confusable · 128

O/0, I/l/1, 日/曰, emoji variants under size and contrast stress.

count · 48

Cardinality of shapes under clutter. Exact integer.

color · 33

Closed-set color naming: pure / noisy / small targets.

relative_size · 48

Which object is larger. Ratios from obvious to near-equal.