Thorsten ,
please find some comments
Fernand
On Mon, Jan 12, 2009 at 03:03:02PM +0800, sunyinan wrote:
Basing on this, our test-department colleagues tested the
displaying impact of downscaled image in printing, presenting,
projecting and showing in PC and MID(Mobile Internet Device).
What we used devices are HP LaserJet 1020 with FastRes 1200(higher
than 600 dpi), SANYO PLC-XW6680CA projector and SONY VPL-CX6
projector, and the MID has 1GHz CPU with 512MB DDR2 memory and 7"
LCD with 800*600 resolution. We set the threshold is 1000 pixel
for column and row. The original image is scaled to that whose
column or row has less than 1000 pixels, such as 2304*1728 to
1152* 864. We tested several images with different formations.
Compared with no-downscaled image, the impact has not the obvious
difference and the speed is increased especially for MID.
Hi sunyinan,
I can't believe that a 1000*1000 image looks the same full-scaled on
a proper inkjet a4 or letter-sized printout. The recommended
size for a4 is 2362x3543
as I sayed before : 150 pixels/inch for inktjet = 1240 x 1770 i(s
sufficient a A4)
offset printing or photoquelity 250/300 pixels/inch = 2500 x 3500 (at
maximum for a A4)
(for a 300 DPI resolution)
I only needed for High Quality offset printers and photo quality
printers and do not mixe up Dots and Pixels inkjet printers works now
easely at 600 DOTS/inch and there for you need a resolution of 150
pixels per pinted inch
- and there *are*
people out there who (mis)use Impress as a photo album.
If you agree with it, I think the next step is to find how and
where to descale the high-res image.
Leave the picture intact in the 00-doc (size do not mather any more) an
reduce the size when the picture must been loaded
When inserting it. You don't want to mess with existing documents,
at least not without asking the user.
Maybe we can provide an option to let the user deciding whether
saving the original size or not when he saving a file.
As pointed out above, definitely.
Cheers,
-- Thorsten
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