Add Text in the center of the image using ImageMagick

I am trying to draw text on the center of the existing image but not able to achieve desired result:

Here is so far i have tried

convert src-image.png -gravity center -pointsize 144 -fill red -annotate -50 'REGISTERED' temp2.png

I am able to achieve text in the center at an angle, but my requirement is to have such text for multiple image dimensions which can vary.

• Font size should be big enough to visible
• Text should start from left bottom corner -> right top corner

Here is one of the reference i tried but cannot get exact command to work. Please let me know how can i achieve this following result for variable image dimensions. Expected image:

I was able to achieve the desired result using following shell script reference from the linked answer:

#!/bin/bash

# Width, height and text
w=$1
h=$2
text=$3
source_file=$4
target_file=$5

# Get pointsize ImageMagick thinks is good
pointsize=$(convert -gravity center -size ${w}x${h} caption:"$text" -format "%[caption:pointsize]" info:)

echo ImageMagick likes pointsize: $pointsize

# So draw text in that size on larger canvas, trim to bounds of letters and resize to desired size
wb=$((w*2))
hb=$((h*2))
convert $source_file -gravity center -fill white -size ${wb}x${hb} -pointsize $pointsize -annotate -45 "$text" -trim +repage -resize ${w}x${h}\! $target_file

Caller

./paint.sh 5237 7852 "REGISTERED" input-image.jpeg result.jpg