convert-images-to-grayscale-inplace

name	convert-images-to-grayscale-inplace
description	Convert all extracted keyframe PNG images from RGB to grayscale inplace, overwriting the original files. Also convert template images (coin.png, enemy.png, turtle.png) to grayscale. Use this before running object counting.

Convert Images to Grayscale Inplace

Use a Python script to convert all keyframe images and template images to grayscale, overwriting the originals.

#!/usr/bin/env python3
import glob
import os
from PIL import Image

# Convert all keyframes to grayscale
keyframes = sorted(glob.glob('/root/keyframes_*.png'))
for frame_path in keyframes:
    img = Image.open(frame_path).convert('L')
    img.save(frame_path)
    print(f"Converted {frame_path} to grayscale")

# Convert template images to grayscale
templates = ['/root/coin.png', '/root/enemy.png', '/root/turtle.png']
for tmpl_path in templates:
    if os.path.exists(tmpl_path):
        img = Image.open(tmpl_path).convert('L')
        img.save(tmpl_path)
        print(f"Converted {tmpl_path} to grayscale")

Save as /root/convert_grayscale.py and run:

python3 /root/convert_grayscale.py