Sökning: "classification accuracy"

Visar resultat 26 - 30 av 222 avhandlingar innehållade orden classification accuracy.

1. 26. Pattern Recognition Methods for Oral Lesion Classification using Digital Color Images

   Författare :Artur Chodorowski; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; oral lesions; supervised classification; pattern recognition; computer-aided diagnosis; support vector machines; color; cancer; shape;

   Sammanfattning : The present thesis addresses the development and application of pattern recognition methods for classification of oral lesions using digital color images as input. The human oral cavity is a site of numerous diseases and two of the common and visually similar lesions are oral leukoplakia and oral lichenoid reactions. LÄS MER

3. 27. Nearest Neighbor Classification in High Dimensions

   Författare :Sampath Deegalla; Henrik Boström; Slawomir Nowaczyk; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nearest Neighbor; High-Dimensional Data; Curse of Dimensionality; Dimensionality Reduction; data- och systemvetenskap; Computer and Systems Sciences;

   Sammanfattning : The simple k nearest neighbor (kNN) method can be used to learn from high dimensional data such as images and microarrays without any modification to the original version of the algorithm. However, studies show that kNN's accuracy is often poor in high dimensions due to the curse of dimensionality; a large number of instances are required to maintain a given level of accuracy in high dimensions. LÄS MER

4. 28. Projection Techniques for Classification and Identification

   Författare :David Lindgren; Lennart Ljung; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : It is very well understood how to evaluate and find, in different senses, optimal linear projections of measurements on linear systems. The solution to the linear least squares problem, the principal component analysis and partial least squares are all examples of well known techniques that work very well as long as the dependencies in data are fairly linear. LÄS MER

5. 29. Identification and Forensic Classification of Amphetamine

   Författare :Sten Jonson; Brian Caddy; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : Amphetamine is one of the most abused drugs worldwide. In the fight against the manufacture and illegal distribution of amphetamine, the contribution from forensic laboratories is the identification of the drug and the establishment of links between seizures. These links contribute to the disclosure of distribution chains and illicit laboratories. LÄS MER

7. 30. Quality improvements in forest products industry : classification of biological materials with inherent variations

   Författare :Ulla Grönlund; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Kvalitetsteknik; Quality Technology and Management;

   Sammanfattning : Classifying logs and boards has an essential economic impact on the forest products industry. In contrast to other process industries the sawmills do not try to homogenize the raw material, but instead try to utilize the inherent properties of every single log and board in the best way. LÄS MER