import glob
from PIL import Image

def analyze_edges(img_path):
    img = Image.open(img_path).convert('RGB')
    w, h = img.size
    pixels = img.load()
    
    top = [pixels[x, 0] for x in range(w)]
    bottom = [pixels[x, h-1] for x in range(w)]
    left = [pixels[0, y] for y in range(h)]
    right = [pixels[w-1, y] for y in range(h)]
    
    print(f"File: {img_path}")
    print(f"Top edge unique colors: {set(top)}")
    print(f"Bottom edge unique colors: {set(bottom)}")
    print(f"Left edge unique colors: {set(left)}")
    print(f"Right edge unique colors: {set(right)}")
    print("---------------------------------")

for f in ['BMP_1_GRASS_1.png', 'BMP_1_GRASS_2.png', 'BMP_1_N.png']:
    analyze_edges(f'/tmp/orig_rat/{f}')