Autodetect background colour for b&w conversion? And disk space issues

Added by Philipp von Klitzing about 9 years ago

While analyzing what (probably) went wrong during the first try of processing larger number of election ballots during a live event I have identified two causes:

1. Some of the scans were (against the best practice guide issued by me) created in color instead of black & white. I assume this was done because the direct b&w scanning resulted in a completely black image. The ballot papers all have a different paper color, always light tones as available in a typical copy shop, yet the resulting contrast and/or threshold values caused trouble. Fiddling with these during these by non-skilled personnel during a live event, however, is hardly possible. Therefore I have this question:

Could AMC auto-detect the background of a paper, and remove that before proceeding to the b&w conversion? This thought is fueled by the fact that there is already a "remove red color" checkbox option in the preferences.

2. I'd like to suggest that AMC acts in a slightly less disk space consuming manner with regard to temporary graphic files: Either have a setting per project, with default ON, to clean up all these files when the project is being closed (or rather: a new project is being opened). Also, it is not 100% clear to me what the "clean temporary files" tool does, i.e. does that affect the current project or all projects? In any case that tool is a bit too hidden for non-skilled users. Background: AMC apparently goes into a never-ending processing loop when it runs out of disk space.

Yours, Philipp