draws rectangles with labels. example input provided. expects the input image to have similarly named `.csv` file next to it

draw_rect.sh

#!/bin/bash

read base_name <<< $( echo $1 | awk -F "\." '{print $1}' )

size=$(convert "$1" -print "%wx%h\n" /dev/null)

read width height <<< $( echo $size | awk -F'[x]' '{print $1" "$2}' )

export IFS=","
prev_label=""

int_coord () {
  read fi <<< $(echo "$1*$2" | bc)
  echo $(printf '%.*f\n' 0 $fi)
}

cat "$base_name.csv" | while read label x0 y0 x1 y1; do

ix0=$( int_coord $x0 $width )
iy0=$( int_coord $y0 $height )
ix1=$( int_coord $x1 $width )
iy1=$( int_coord $y1 $height )

echo "these are the coords: ($ix0,$iy0) ($ix1,$iy1)"

convert $1 -fill none -stroke black -draw "rectangle $ix0,$iy0 $ix1,$iy1" $1
if [ "$prev_label" != "$label" ] ; then
  convert $1 -fill none -stroke black -annotate +$ix0+$iy0 "$label" $1
  prev_label=$label
fi
done

example.csv