OCR-based image features for biomedical image and article classification
Hagit Shatkay, Ramya Narayanaswamy, Santosh S. Nagaral, Na Harrington, Rohith MV, Gowri Somanath, Ryan Tarpine, Kyle Schutter, Timothy G. Johnstone, Dorothea Blostein, Sorin Istrail, Chandra Kambhamettu · 2012
Images form a significant and useful source of information in published biomedical articles, which is still under-utilized in biomedical document classification and retrieval. Much current work on biomedical image retrieval and classification employs simple, standard image features such as gray scale histograms and edge direction to represent and classify images. We have used such features as well to classify images in our early work [5], where we used image-class-tags to represent and classify articles.