run2-image-grayscale

name	run2_image-grayscale
description	Convert PNG images to grayscale inplace using ImageMagick; covers both keyframes and template images for consistent matching.

Convert Images to Grayscale (Inplace)

Prerequisites

• ImageMagick: sudo apt install imagemagick

Convert Single Image Inplace

convert image.png -colorspace Gray image.png

Batch Convert Keyframes Inplace

for f in /root/keyframes_*.png; do
    convert "$f" -colorspace Gray "$f"
done

Convert Template Images to Grayscale (Important!)

When keyframes are converted to grayscale, template images used for matching should ALSO be converted to grayscale for consistent comparison:

for f in /root/coin.png /root/enemy.png /root/turtle.png; do
    convert "$f" -colorspace Gray "$f"
done

Notes

• -colorspace Gray converts to grayscale while keeping PNG format and file extension
• Overwriting the input path makes the operation inplace
• Template images must match the colorspace of the frames they are compared against
• Works for PNG, JPG, BMP, and other formats