# set terminal png truecolor nocrop font arial 8 size 420,320 # set output 'image.4.png' unset key set label 1 "\"This picture was taken by my friend Ansel Adams.\"" at 63, 140, 0 centre norotate back nopoint offset character 0, 0, 0 set xtics border out scale 1,0.5 mirror norotate offset character 0, 0, 0 autofreq set ytics border out scale 1,0.5 mirror norotate offset character 0, 0, 0 autofreq set ztics border out scale 1,0.5 nomirror norotate offset character 0, 0, 0 autofreq set cbtics border out scale 1,0.5 mirror norotate offset character 0, 0, 0 autofreq set title "The palette can be changed from color to gray scale" set xrange [ -10.0000 : 137.000 ] noreverse nowriteback set yrange [ -10.0000 : 157.000 ] noreverse nowriteback set palette positive nops_allcF maxcolors 0 gamma 1.5 gray unset colorbox plot 'blutux.rgb' binary array=128x128 flipy format='%uchar%uchar%uchar' using ($1+$2+$3)/3 with image