Image annotation · 1 / 3
Identify the target and its instances
Distinguish class from instance: both umbrellas are targets; the shoe and shadows are other image content.
Rules for this example
- R1
Annotate umbrellas only, with one box per confirmed umbrella.
- R2
The handle belongs to the target; its shadow does not.
Independent example
The illustration contains two separate umbrellas, a shoe and ground shadows. Both umbrellas are identifiable.
| Inspection scope | Objects in this example |
|---|---|
| Target class | Umbrella A / Umbrella B |
| Explicitly excluded | Shoe / Shadow |
An independent diagram, not a practice photograph. Check actual tasks against their own rules.
What to do
- Read the class requirement and note that only umbrellas are targets.
- Confirm each umbrella and list A and B as separate targets.
- Check the inventory, exclude the shoe and shadows, and look for missed confirmed umbrellas.
Common mistake and why it matters
Boxing every foreground object: prominence does not establish membership in the target class.
Try making a judgment
How many target boxes does this example need?
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Show the reasoning
Reference for this example Two.
Only umbrellas are requested, and both instances are confirmed. The shoe and shadows do not add instances.
A static explanation of this teaching example, not feedback generated from your input.