Get Random Images

get_rnd_img_gm.sh

#!/bin/bash

# command line args
ID="$1";
OUT="$2";

# defaults
[ "$ID" ]   ||  ID="$RANDOM"
[ "$OUT" ]  ||  OUT="rnd_img_$(printf %08d "$ID").jpg"

W=3264
H=2448
SF=4

# generate random image
gm convert \
	-size "$((W/SF))x$((H/SF))"  \
	plasma: \
	-roll +$((RANDOM*20/32768))+$((RANDOM*15/32768))  \
	-implode $((RANDOM*4/32768))  \
	-swirl $((RANDOM*360/32768-180))  \
	-scale "$((SF*100+25))%"  \
	-gravity center  -extent "${W}x${H}"  \
	\
	-font '/System/Library/Fonts/SFNSDisplayCondensed-Medium.otf'  \
	-pointsize $((72*SF))  \
	-fill white  \
	-undercolor '#000' \
	-gravity north  \
	-draw "text 0,$((100*SF)) ' $OUT"  \
	-quality 90  \
	"$OUT"