My scanner HP Deskjet 2130 's brightness (as well as contrast) range is 0 to 2000. 1000 provides with a good result. (It can be confirmed using scanimage) But you see, this stuff does not support a number larger than 100. Maybe you can check scanimage and determine the range dynamically?
My scanner HP Deskjet 2130 's brightness (as well as contrast) range is 0 to 2000. 1000 provides with a good result. (It can be confirmed using
scanimage) But you see, this stuff does not support a number larger than 100. Maybe you can checkscanimageand determine the range dynamically?