⚠ This runs the counter IN YOUR BROWSER. Node tools (debug-image, the gates) decode
JPEG with jpeg-js and the browser uses its own decoder, so blob IDs and areas differ slightly
between them — measured on r-f5d11815, the same clump is blob 2 / 5706px here and blob 1 /
5751px in Node. Compare within one environment, never across.
final placements
watershed markers
arc interval
this blob's outline
pick an image