Ed, would you add a new "crop" option in Vuescan.

O

OlegK

Hi Ed,
could I suggest some improvement for the crop handling in Vuescan?

I noticed that absolutely most of the time I just choose the maximum
area that doesn't include white (black) borders. The "Dimage Scan"
software supports the automatic crop option with this functionality.
But, of course, I prefer to use Vuescan :).

I think it will save considerable time if Vuescan has such a cropping
option.

Regards,
Oleg.
 
B

Bart van der Wolf

OlegK said:
Hi Ed,
could I suggest some improvement for the crop handling
in Vuescan?

I noticed that absolutely most of the time I just choose
the maximum area that doesn't include white (black) borders.

I'm not Ed, but I'll give my view on it.
If I understand your question, it seems VueScan already does that (if it can
determine the edge), with the default Crop|Auto position option. You can
additionally force a restriction on the crop size by selection of a
non-Automatic Crop size.

Bart
 
O

OlegK

Checked it. No, it does a different thing - the "auto_crop_position" +
"maximum_area" combination gives the <minimal frame that includes all
the image pixels>. What I want is the <maximal frame that doesn't
include borders>.

Regards,
Oleg.
 
E

Erik Krause

Hello, Bart van der Wolf
you wrote...
I'm not Ed, but I'll give my view on it.
If I understand your question, it seems VueScan already does that (if it can
determine the edge), with the default Crop|Auto position option.

The frame for 35mm slide is too small - 23x34mm. Normal slide mounts
have at least 35mm width. 35mm film is a bit too small too, at least if
I scan with the Nikon SA-21 film strip adaptor.

The whole algorithm fails completely for negatives, since the film
borders (visible at the short edges) are clear whereas the film holder
is black. Vuescan does not recognize the clear borders.
 
E

Erik Krause

Hello, OlegK
you wrote...
Checked it. No, it does a different thing - the "auto_crop_position" +
"maximum_area" combination gives the <minimal frame that includes all
the image pixels>. What I want is the <maximal frame that doesn't
include borders>.

use '35mm film' or '35mm slide' instead of 'maximum'...
 
M

Mendel Leisk

Checked it. No, it does a different thing - the "auto_crop_position" +
"maximum_area" combination gives the <minimal frame that includes all
the image pixels>. What I want is the <maximal frame that doesn't
include borders>.

Regards,
Oleg.

I just experimented with the x and offsets and dimensions until I had
a manual crop size that worked with all the frames in the holder, with
Scan Dual II.
 

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