[Digikam-users] Re: can't view scanned tiff images

[Jim Dory]

On Sun, Dec 5, 2010 at 11:40 AM, Jim Dory <james at dorydesign.com> wrote:
> On Sun, Dec 5, 2010 at 10:02 AM, Marcel Wiesweg <marcel.wiesweg at gmx.de> wrote:
>>
>>
>>> I scan images using a proprietary Vuescan (www.hamrick.com) which
>>> supports Linux and my Nikon LS9000 film scanner. I may have a setting
>>> wrong in Vuescan or Digikam that after I scan an image (they can be
>>> quite large - ~50MB or more) Digikam complains that it cannot open the
>>> tif file. I have the output set in Vuescan as a 24 bit RGB file type,
>>> with Auto compression. Choices on the file type are 24 Bit and higher
>>> RGB, or lower B & W.
>>
>> The TIFF format is pretty complex and allows a variety of formats and quirks,
>> which are difficult to support.
>> I recommend to report the bug at bugs.kde.org, providing a (small) sample
>> image that cannot be opened by digikam.
>
>
> Would a 1.2MB (1,300,683) file be too large? In my scan program, I set
> the input on Vuescan from Archive to Web with Scan Resolution set to
> Auto and that was the smallest size it scanned that Digikam can not
> read. If I hover the mouse over the image in Digikam it sees the
> thumbnail (not on the Archive sized ones) but the popup info display
> shows it cannot find the image dimensions, and Photoshop shows the
> resolution to be 667ppi with a tiny image size in inches.
>
> If I set the Scan Resolution in Vuescan to the lowest in the list,
> which is 667 - same as above, then the image size more than doubles
> (3.5MB), but Digikam can see this image normally. I can also set the
> Scan Resolution to Custom and specify a smaller resolution (for
> smaller image size) but Digikam sees these images normally. So it
> seems if I have the Scan Resolution set to Auto in the scanner
> software then Digikam cannot see the image preview or won't open it in
> Edit. Digikam behaves normally with images saved to jpeg.
>
> I say all this in case it makes it obvious what the problem is, and if
> not, to see if you think a 1.2 (1.3?) image is too large for the bugs
> page.
>
> thanks, Jim
>

I may have found a work around as posting this made me think... If I
set the scanner software's resolution to other than Auto, it seems to
work. I just have to figure out settings that give my the image size I
desire. When Quality is set to Archive, with Scan Resolution set at
Auto, the image is scanned at 4000ppi resolution. Resultant image size
is around 35MB. If I set the Scan Resolution from Auto to 4000dpi,
Photoshop still shows image size as 4000ppi, same inch dimensions, but
the image size has grown to 126MB. But Digikam can see it normally. I
just don't want to fill up my hard drive quite that fast..

cheers, Jim