Where are max(r,g,b) <= 8 pixels inside x=250..1000, y=200..1000?
Black at (400, 200)
Black at (450, 200)
Black at (500, 200)
Black at (550, 200)
Black at (600, 200)
Black at (650, 200)
Black at (700, 200)
Black at (750, 200)
Black at (800, 200)
Black at (850, 200)
Black at (450, 250)
Black at (500, 250)
Black at (550, 250)
Black at (600, 250)
Black at (650, 250)
Black at (700, 250)
Black at (750, 250)
Black at (800, 250)
Black at (500, 300)
Black at (550, 300)
Black at (600, 300)
Black at (650, 300)
Black at (700, 300)
Black at (600, 350)
Black at (650, 350)
Black at (450, 550)
Black at (750, 550)
Black at (800, 550)
Black at (450, 600)
Black at (500, 600)
Black at (700, 600)
Black at (750, 600)
Black at (800, 600)
Black at (450, 650)
Black at (500, 650)
Black at (550, 650)
Black at (600, 650)
Black at (650, 650)
Black at (700, 650)
Black at (750, 650)
Black at (800, 650)
Black at (450, 700)
Black at (500, 700)
Black at (550, 700)
Black at (600, 700)
Black at (650, 700)
Black at (700, 700)
Black at (750, 700)
Black at (800, 700)
Black at (450, 750)
Black at (500, 750)
Black at (550, 750)
Black at (600, 750)
Black at (650, 750)
Black at (700, 750)
Black at (750, 750)
Black at (800, 750)
Black at (450, 800)
Black at (500, 800)
Black at (550, 800)
Black at (600, 800)
Black at (650, 800)
Black at (700, 800)
Black at (750, 800)
Black at (800, 800)
Black at (450, 850)
Black at (500, 850)
Black at (550, 850)
Black at (600, 850)
Black at (650, 850)
Black at (700, 850)
Black at (750, 850)
Black at (450, 900)
Black at (500, 900)
Black at (550, 900)
Black at (600, 900)
Black at (650, 900)
Black at (700, 900)
Black at (450, 950)
Black at (500, 950)
Black at (550, 950)
Black at (600, 950)
Black at (450, 1000)
Black at (500, 1000)
Black at (550, 1000)
Black at (600, 1000)
Black at (1000, 1000)