import sys, time, subprocess
from PIL import Image
name, label = sys.argv[1], sys.argv[2]
def grab(out):
    subprocess.run(["powershell","-ExecutionPolicy","Bypass","-File","grab.ps1",
                    "-Out",out,"-Match",name], capture_output=True)
    return Image.open(out).convert("RGB")
prev = grab("hr_0.png"); changes = []
t0 = time.time()
for i in range(1, 13):
    time.sleep(2)
    cur = grab("hr_%d.png" % i)
    pa, pb = prev.load(), cur.load(); w,h = cur.size
    d = sum(1 for y in range(0,h,4) for x in range(0,w,4) if pa[x,y]!=pb[x,y])
    changes.append(d)
    prev = cur
moved = sum(1 for c in changes if c > 20)
print("%s: %d of %d samples (2s apart) showed change -> ~%.1f s between updates"
      % (label, moved, len(changes), (len(changes)*2.0)/max(moved,1)))
print("   per-sample changed-pixel counts:", changes)