on 2013-10-25 12:17 Paul Stenquist wrote
With the Epson V500, there was little fine control of the various functions. For example, when trying to set black point movement of the control would provide almost no discernible difference, but when the control was pushed to a certain point, the whole thing would fall off the cliff and a drastic change would be generated. Same thing with low and high curves. Plus after tweaking the preview, the resulting scan wouldn't match.
tip: tweaking the preview is not especially accurate; instead i would suggust using Vuescan's "raw" workflow; this gathers the the "uncorrected" data from the scanner, essentially a 16-bit TIFF with flat gamma curve; this data can then be interactively reprocessed in VueScan to optimize the parameters without the need to rescan the source (saving a lot of time); if you are doing a batch, the optimized parameters can then be saved as a preset and automated
or you can save the raw data as TIFF (or DNG, but not much point in that) and use Lightroom or whatever to do (and/or automate) your adjustments
Epson's drivers may now be okay, but my history (going back to early 90s) is to distrust the proprietary drivers that are provided through (not by) Apple; too often they have added unwanted background processes or even caused system-wide problems; last i tried were Canon's mid-2000s drivers, which had nasty USB side-effects and i removed them quickly
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