Changes in version 4.0.0: NEW FEATURES o 'transpose' function for transposing an image by swapping its spatial dimensions o greyscale functions for computation of the self-complementary top-hat (I. Kats) o a median filter based on Perreault's constant time median filter (J. Barry) SIGNIFICANT USER-VISIBLE CHANGES o removed all dependencies towards GTK+ and ImageMagick o replaced the former GTK+ based 'display' function by a new one displaying images using either a JavaScript image viewer, or R's built-in raster graphics o 'readImage' and 'writeImage' now rely on 'jpeg', 'png' and 'tiff' packages and do not depend on ImageMagick any more o added support for images containing an alpha channel; both greyscale and color images with an alpha channel are stored as a 'colormode = Color' Image o refactored the functions, not using ImageMagick any longer: 'translate', 'affine', 'rotate', 'resize' o deprecated: 'blur', 'equalize' o deprecated: 'drawtext', 'drawfont' o deprecated: 'getFeatures', 'hullFeatures', 'zernikeMoments', 'edgeProfile', 'edgeFeatures' o deprecated: 'haralickFeatures', 'haralickMatrix' o deprecated: 'moments', 'smoments', 'rmoments', 'cmoments' o removed 'animate' o improved 'getFrame': better performance by reassigning array dimension only when needed o modified 'as.raster' o 'inst/images/lena.gif' is now 'inst/images/lena.png' o overhauled the testing procedure in 'tests/test.R' o added 'NEWS.Rd' BUG FIXES o 'erode' and 'dilate': incorrect range of loop indices caused memory reads from outside the kernel vector