Yes, your assumption is right. These tags are image classification tags. They are part of an ongoing research in the area of classification and computational learning. The research goal is to reach a precise category based image classification with a minimal learning effort.
- yahoo large scale flickr tag image classification challenge
- Everingham, M., Van Gool, L., Williams, C. K. I., Winn, J. and Zisserman, A. The PASCAL Visual Object Classes (VOC) Challenge International Journal of Computer Vision, 88(2), 303-338, 2010 - PDF
- http://pascallin.ecs.soton.ac.uk/challenges/VOC/
- Training and Test Data
- Results & Leaderboard