Scanned images aren't saving in 48 bit

[mjmm]

I have the scanner on my Epson RX510 set to scan negs/slides at 2400
dpi and 48 bit colour. While it is scanning it reports the file size
as 40 M, but when it saves the files they are around 20 M and 24 bit.
How can I get it to save the files as 48 bit?

Thanks
Mike

 

[Bart van der Wolf]

I have the scanner on my Epson RX510 set to scan negs/slides at 2400
dpi and 48 bit colour. While it is scanning it reports the file size
as 40 M, but when it saves the files they are around 20 M and 24 bit.
How can I get it to save the files as 48 bit?

Are you by any chance scanning from within a 24-bit application?

Bart

 

[mjmm]

No. I have been using the supplied scanning software, and the save to
file option.

Mike

 

[Alan Smithee]

What is the supplied scanning software called? What version?

 

[mjmm]

Epson SCAN 1.32E (from Epson Smart Panel)

What is the supplied scanning software called? What version?

 

[RSD99]

You might check the download page at Epson's web site for an
updated version. I don't have the RX510 ... but Epson Scan
for the 4870 is now up to something like version 2.3 ...

 

[ggull]

I have the scanner on my Epson RX510 set to scan negs/slides at 2400
dpi and 48 bit colour. While it is scanning it reports the file size
as 40 M, but when it saves the files they are around 20 M and 24 bit.
How can I get it to save the files as 48 bit?

If the software is like that supplied for the Epson 2450, it will only save
to 48 bits if you are scanning from within a 48-bit application like
Photoshop. In spite of what the box claims, it specifically won't save to
48-bit files on its own, using the 'save to file' option.

 

[mjmm]

When I scan film/slides with my Epson Photo 2400 using Smart Panel it
saves in 48 bit, giving 40 M files, so I assumed the later software
for a later Epson 2400 dpi scanner would do the same. One difference
when using the later software is that when I save I get a warning that
not all applications can use the 48 bit files, as I have found with my
PhotoShop Elements. I was wondering if by clicking ok on that message
I am telling it to save it at 24 bit. As it doesn't specifially say it
is changing the file to 24 bit I thought I was only acknowledging that
I had read the message.

Mike

 

[ggull]

You may be right. I'll have to check it out. It's been a while since I
visited that problem and maybe I didn't understand it well enough at the
time. But I recall that with the 2450's Smart Panel it saved the same size
file whether I used 48 or 24 bits in the TWAIN, and don't remember getting
that warning/OK popup. I had been looking to save 48 bit scans (or 16 bit
greyscale) for possible future use (when I might afford full Photoshop) of
materials that had to be returned to their owners, and recall being blocked
from that. Maybe the problem was that it was prints and not transparencies?

Running an experiment
48 bit color photo, 300 dpi, 8.5x11.7 inches, Twain claims 51.21 MB
close, save as TIFF --- size 26,223 KB
color photo, ...the same... Twain says 25.60 MB
close, save TIFF --- size 26,223 KB

I can't remember all the details of where I found the info that said (or
that I remember saying) you had to save 48-bit from within an application.
I should check the epson site to see if there's an update.

 

[mjmm]

The Epson Scan program is 1.32E and the update on the Epson site is
1.32. I assumed that the 1.32E was later than the 1.32, maybe I was
wrong.

I experimented a bit with the settings and I can't get more the 24 bit
files, though a few were 16 bit.

I will try scanning with my 2400 Photo Perfection scanner using the
newer software, if they work together.

Mike

 

[RSD99]

Are you running Epson Scan as a stand-alone program, or are
you scanning from within a program that uses the Epson Scan
TWAIN interface (such as scanning from within Adobe
PhotoShop Elements)?

If you are using the TWAIN interface, try running Epson Scan
as a stand-alone program.

 

[mjmm]

I tried both Epson Scan stand alone and with Epson Smart Panel

Mike

 

[RSD99]

Well ...

(1) Could you save a 48 bit file when you were running
Epson Scan as a stand-alone application?

(2) What type of file are you trying to save?

TIF / TIFF
JPG / JPEG
Other

(3) Are you using the 'Professional' menu?

 

[mjmm]

1.No
2. TIF,TIFF
3. Yes

 

[RSD99]

your answer
"1.No"
Makes me think that the scanner is not capable of saving a
48-bit file.

 

[mjmm]

It finally started saving in 48 bit with uncompressed TIF. I tried
that before without success so I must have changed another setting
that I can't remember.

Thanks again
Mike