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...genrgb(imatest,ngris=16,stretch="l") > imagenrgb(imatest,ngris=16,stretch="n") > imagenrgb(imatest,ngris=8,stretch="n") > imatest.cod <- imagenrgb(imatest,ngris=16,stretch="n",ver=F) > imagen(imatest.cod$ima, col=imatest.cod$cols) Imatest is a subscene of a satellite image. The imatest file saved with save(imatest,file="imatest") is 469k. It's probably better not to send it to the list, but I can send it to interested people fot testing. The main problem is that, at least with RAM up to 48Mb, the function is slow for normally size...

I?ve installed R 3.7.0 on a new laptop running macos 10.14.5 and have managed to get most of my usual packages to compile from source with a ~/.R/Makevars file that looks like this: CC=/usr/local/clang8/bin/clang CXX=/usr/local/clang8/bin/clang++ LDFLAGS=-L/usr/local/clang8/lib CPPFLAGS=-I/usr/local/clang8/include -I/opt/X11/include/freetype2 FC=/usr/local/gfortran/bin/gfortran

I have seen several posts (but few answers) in "R-help search" as to whether there are any packages that use R to process digital images. There are several categories related to the general type of problem that are useful to know about: -- Any existing packages for taking a digital image format {any flavor like TIFF, jpg, png, or GIF (or even TWAIN input)} and representing it internally

...xt.o Shape.o SphereMesh.o SphereSet.o SpriteSet.o String.o Surface.o TextSet.o Texture.o Viewpoint.o api.o assert.o callbacks.o device.o devicemanager.o fps.o ftgl.o geom.o gl2ps.o glErrors.o glgui.o gui.o init.o par3d.o pixmap.o platform.o pretty.o render.o rglmath.o rglview.o scene.o select.o subscene.o win32gui.o win32lib.o x11gui.o x11lib.o -lGLU -lGL -framework GLKit -framework OpenGL -dylib_file /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib:/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib -L/usr/local/lib -lpng16 -L/usr/X11/lib...

Hi there I'm looking for a function to read PNG-bitmap-images from a file into R. I only found: - the pixmap-package which cannot import png or similar formats - the rimage-package which can only import lossy jpeg-images (the convertion from png to jpeg modifies the data!) Is there any possibility to read PNG-files? Thanks for any help Dominic Sydler