Calculate SSIM Index

Author: Gabriel Prieto Renieblas (gprietor at
Department of Radiology, Faculty of Medicine, Complutense University
Madrid, Spain
History: 2008/12/07: First version
Limitation: Does not work with RGB images
Installation: Download SSIM_index.class to the plugins folder, or subfolder, restart ImageJ, and there will be a new "SSIM index" command in the Plugins menu, or submenu.
Description: Description: This plugin calculates the structural similarity index (SSIM) described in
Z. Wang, A. C. Bovik, H. R. Sheikh and E. P. Simoncelli, "Image quality assessment: From error visibility to structural similarity, " IEEE Transactions on Image Processing, vol. 13, no. 4, pp. 600-612, Apr. 2004.

A user manual is available at

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