Run2 object counting

Skill cxcscmu/SkillLearnBench/skills/b2-self-feedback-claude-sonnet-4-6/video-object-counting/run2_object-counting

Count template objects in keyframes using count_objects.py; parse integer from output string and generate a CSV with results per frame.From its SKILL.md

Install

npx -y skills add cxcscmu/SkillLearnBench --skill run2_object-counting

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SKILL.md

1.8 KB, 464 tokens by cl100k_base, as published. Nobody here has run it

Object Counting with Template Matching

Script Location

/root/.claude/skills/object_counter/scripts/count_objects.py

Usage

python3 /root/.claude/skills/object_counter/scripts/count_objects.py \
    --tool count \
    --input_image <image_file> \
    --object_image <template_image> \
    --threshold 0.9 \
    --dedup_min_dist 3

Output Format

The script returns a sentence like:

There are 3 objects (`/root/coin.png`) in file: `/root/keyframes_001.png`

Parse the integer with: grep -oP 'There are \K\d+'

Full Workflow: Count All Objects and Generate CSV

SCRIPT="/root/.claude/skills/object_counter/scripts/count_objects.py"

echo "frame_id,coins,enemies,turtles" > /root/counting_results.csv

for frame in $(ls /root/keyframes_*.png | sort); do
    coins=$(python3 "$SCRIPT" --tool count --input_image "$frame" \
        --object_image /root/coin.png --threshold 0.9 --dedup_min_dist 3 2>/dev/null \
        | grep -oP 'There are \K\d+')
    enemies=$(python3 "$SCRIPT" --tool count --input_image "$frame" \
        --object_image /root/enemy.png --threshold 0.9 --dedup_min_dist 3 2>/dev/null \
        | grep -oP 'There are \K\d+')
    turtles=$(python3 "$SCRIPT" --tool count --input_image "$frame" \
        --object_image /root/turtle.png --threshold 0.9 --dedup_min_dist 3 2>/dev/null \
        | grep -oP 'There are \K\d+')
    echo "$frame,${coins:-0},${enemies:-0},${turtles:-0}" >> /root/counting_results.csv
done

Parameters

--threshold 0.9: High confidence reduces false positives
--dedup_min_dist 3: NMS deduplication prevents counting same object twice

What ships with it

Read from the repository

Just SKILL.md. No reference files, no scripts.