Create README.md

A dataset created for a school course in YOLOv26 format, containing images of trees, balls, and blank patterns. It primarily focuses on identifying Nordic trees and medium-to-large-sized balls. Main data sources: Google Open Images, Google Images, and personal videos.

README.md

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+---
+task_categories:
+- object-detection
+pretty_name: c
+size_categories:
+- 1K<n<10K
+---