Hey guys, I resolved the issue I was having with the dark_shading calibration. The lamp was turning off fine but the | REG03_LAMPPWR in gl842_begin_scan was turning the light back on for the scan :/ . Having resolved this there is still a black line down the center of the page. The black_shading.pnm file is now completely black and the white_shading.pnm file is mostly white with some dark edges.
Any thoughts on how I sort this out now? Is it related to the number of sensor pixels or the shading area or something? Chris -- The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.
