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Warning: session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in /var/www/tb-usercake/models/config.php on line 51
w, h = img.width, img.height local sum = 0 for y=0, h-1 do for x=0, w-1 do local i = img.getInt(x, y) local b = bit32.band(i, 255) sum = sum + b end end return "average brightness (B channel): "..(sum/(255*w*h))