Search:

Interesting Point! I'm using a 4990 and Ai--reaching similar conclusions to sanking's earlier in this forum. Not sure why the difference. Notwithstanding--I'm more convinced now that channel...

I conducted a similar test to compare.

Interesting, within Silverfast, I was/am able to "select" separate color filters for both RGB and Grayscale. However, for each RGB scan with a separate...

Sounded like you may have had an interesting approach using filters. Just wanted to explore whether or not green channel isolation is feasible with an Epson scanner and Silverfast in 48bit. IMHO,...

Thanks for the pointer in Silverfast for green channel selection. Are there any other settings that need to be changed/set? As Sandy pointed-out, it appears that Epson scanners (4990 and 750) and...

Agreed-if there's a way to scan the green channel independently in Silverfast, it's not obvious. I suspect this approach may be similar to a 16bit grayscale output implementation anyway?
...

The previous exchange prompts an "alternative" scanning approach question. Because Silverfast is so powerful:

Would it ever make sense to optimize the scan by scanning just the green channel...

Frank -- When you use the channel mixer, would you mind sharing where you set your starter RGB starter settings?

Sparq,

Yes, I just completed a 48bit RGB vs. 16bit grayscale scan comparison with both Silverfast Ai and Epson Scan (sorry, not enuf budget to try VueScan) on an Epson 4990. And, I compared the...

Thanks to many for good input/feedback--here are some of my early conclusions based upon some controlled tests. Standard Disclaimer, of course, YMMV:


1. It is indeed worth scanning at 48 bit...

Hi All,

I'm relatively new to this forum and thought I would reach out for some advice from those of you scanning B&W images on an Epson 4990.

I really believe this B&W conversion stuff is...

Thanks, Kirk. I did a couple of scans and tested, too. It is indeed the green channel. Sometimes science just defies logic :)

Kirk,

Thanks for the input. I have a 4990 with Silverfast Ai and, yes, plan to test various approaches because "every bit helps". I'm even going to try Epson's software for comparison just to...

Brian,

I noted in a few other threads for B&W source material that you were evaluating 48 bit RGB scanning (discarding the red/green channels in PS) vs. scanning in 16 bit grayscale mode.

Did...