Test pictures as generated by the generator

chan	hrpt	metop	meteor	FY3
1	0..1023, incr 1 0 0 1 1 ... 1023 1023 invert every n lines, n=[0-16]	127 hor. bars step 1 invert every 8 lines	0..784, incr 1 0 0 1 1 ... 784 784	63 hor. bars step 1 invert every 8 lines
2	0..1023..0, incr 1 0 1 ... 1023 1022 ... 1 0 invert every n lines, n=[0-16]	254 hor. bars step 1 invert every 8 lines	0..1023..484, incr 1 0 1 ... 1023 1022 ... 477	126 hor. bars step 1 invert every 8 lines
3	0..1023, incr 64 16x 0 16x 64 ... 16x 1023 invert every n lines, n=[0-16]	381 hor. bars step 1 invert every 8 lines	0..767, incr 64 128x 0 128x 64 ... 34x 768	189 hor. bars step 1 invert every 8 lines
4	0..1023, incr 64, 128x 0 64 128...1023 0 64 ... 1023 ... invert every n lines, n=[0-16]	508 hor. bars step 1 invert every 8 lines	0..765, incr 64, 128x 0 64 128...702 4x765 0 64 ... 4x765 ...	252 hor. bars step 1 invert every 8 lines
5	0/1023 pixels per bar: 128, 64, ..., 4,2,1 invert every n lines, n=[0-16]	635 hor. bars step 1 invert every 8 lines	0/1023 pixels per bar: 128, 64, ..., 4,2,1	315 hor. bars step 1 invert every 8 lines
6			0..765, incr 1 0 16 32...1008 0 16 ....	378 hor. bars step 1 invert every 8 lines
7				441 hor. bars step 1 invert every 8 lines
8				504 hor. bars step 1 invert every 8 lines
9				567 hor. bars step 1 invert every 8 lines
10				630 hor. bars step 1 invert every 8 lines