A Survey of Preprocessing and Feature Extraction Techniques for Radiographic Images

@article{Hall1971ASO,
  title={A Survey of Preprocessing and Feature Extraction Techniques for Radiographic Images},
  author={E. Hall and R. Kruger and S. Dwyer and D. Hall and R. Mclaren and G. S. Lodwick},
  journal={IEEE Transactions on Computers},
  year={1971},
  volume={C-20},
  pages={1032-1044}
}
Feature extraction is one of the more difficult steps in image pattern recognition. Some sources of difficulty are the presence of irrelevant information and the relativity of a feature set to a particular application. Several preprocessing techniques for enhancing selected features and removing irrelevant data are described and compared. The techniques include gray level distribution linearization, digital spatial filtering, contrast enhancement, and image subtraction. Also, several feature… Expand
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