0.4 (Aug 18, 2022) * An issue in SSIM and CQ functions was fixed (reported by Julia Markowski). * Minor clean-ups in C and R codes. 0.3-8196 (Sep 22, 2020) * C code to obtain certain descriptive statistics is now provided by 'fastmatrix' R package. * Minor clean-ups in C and R codes. 0.3-819 (Jun 20, 2020) * Fixed an issue reported by professor Brian Ripley. * Two filters (Kuan and Nathan) were added to routine denoise. 0.3-81 (Jun 15, 2020) * Added routine to remove additive or multiplicative noise from a corrupted image. * Fixed error in function to compute the codispersion coefficient. * Code for imnoise was simplified. 0.3-8 (Jul 31, 2019) * Now underlying code for the computation of sample mean, variance and covariance is based on an online algorithm. * Added routine to convert RGB image to grayscale using several methods. * Added routines to add noise to image (available methods: gaussian, salt & pepper, uniform and Gamma speckle). * Added routines to compute similarity between images. * Added some auxiliary routines. 0.3 (Mar 20, 2018) * Now routines modified.ttest and modified.Ftest return the estimated effective sample size and the unscaled F-statistic. * Added routine to compute the modified F-test (Dutilleul et al. 2008, JSPI 138, 1402-1415). * Authors field at DESCRIPTION file was corrected. 0.2-3 (Aug 08, 2014) * Internal code for computation of codispersion coefficient and modified t-test was corrected (contributed by Diego Mancilla). * Changes to NAMESPACE file to compliance with guidelines described in 'Writing R Extensions' Section 1.5. 0.2 (Jun 15, 2012) * Initial release of the SpatialPack on CRAN.