Fast Non-Iterative PCA computation for spectral image analysis using GPU

摘要

In this study, we implement a fast non-iterative Principal Component Analysis computation for spectral image analysis by utilizing Graphical Processing Unit GPU. PCA inner product computation efficiency between Central Processing Unit CPU and GPU was examined. Performance was tested by using spectral images with different dimensions and different PCA inner product image counts. It will be shown that the GPU implementation provides about seven times faster PCA computation than the optimized CPU version. Difference to the commonly used scientific analysis software Matlab is even higher. When spectral image analysis is needed to make in realtime, CPU does not offer the necessary performance for larger spectral images. Therefore, powerful GPU implementation is needed.