echo 'set terminal pngcairo color enhanced size 750,525 font ",10" ;' \
"$(< plot.gp)" | gnuplot > ${testname}$I.png
mkdir -p thumb
- convert -size 150x105 -quality 90 -type Palette -depth 8 ${testname}$I.png thumb/${testname}$I.png
+ convert -resize 150x105 -gamma 0.5 -quality 90 -type Palette -depth 8 ${testname}$I.png thumb/${testname}$I.png
# echo 'set terminal pngcairo color enhanced size 150,105 font ",1";' \
# "$(< plot.gp)" | gnuplot > thumb/${testname}$I.png