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Understand your point reg. image resolution, Tim.
But I got perfectly good 300 dpi image resolution of my .png by resizing
and manipulating in Photoshop. If you uncheck the 'resize image' box
while saving an image, it constrains the resolution along with the image
proportions and you get what you want. This works because it has worked.
All the journal folks that howl murder at lost resolution have liked my
pretty pictures :)
Who taught me this? A crystallographer who got this knowledge in turn
from his wife, a graphics artist who makes cover pictures for a living
for children's books.
Now printer woes wrt colours and resolution are incomprehensible to my
puny brain. I'm told there's only one solution for printers - dealing
with a baseball bat....
Ofcourse, Warren just wrote his suggestions, which takes care of our
concerns...
Raji
Tim Fenn wrote:
On Wed, Mar 29, 2006 at 04:47:47PM -0500, Raji Edayathumangalam wrote:
Here's a suggestion. Many moons ago, PyMOL would write out pictures with
a default resolution of 72 dpi.
To circumvent this, I used to reset the size of the output image in
PyMOL to get the final resolution you want in the foll. manner.
Say you want a fig. with final resolution of ~ 300 dpi at a final size
of 4-in by 3-in.
I always notice people do this, but it doesn't actually get around the
issue of print resolution versus image resolution (and no, the two
aren't the same). Just becuase I have a 1200x900 image scaled in a
4x3" box doesn't mean my printer will use 300DPI when it prints - I've
seen cases where printers/programs actually take a 72DPI image and
upsample it to 300, then rescale it to the desired size on the page,
which doesn't look too good in print. Anyway, I've started using the
GIMP to reset my print size without affecting the image in any way, so
its easy to just drop the image into whatever program without having
to do too much math (desired image size * 300 / 72 = head 'asplode).
I've attached a GIMP non-interactive script, if anyone finds it as
useful as I do. After running images through povray, I run:
gimp -i -b '(batch-printsize-change "*.png" 300.0 300.0)' '(gimp-quit 0)'
I'm sure photoshop can do the same, but I've never really used it...
HTH,
Tim
------------------------------------------------------------------------
(define (batch-printsize-change pattern
xresolution
yresolution)
(let* ((filelist (cadr (file-glob pattern 1))))
(while filelist
(let* ((filename (car filelist))
(image (car (gimp-file-load RUN-NONINTERACTIVE
filename filename)))
(drawable (car (gimp-image-get-active-layer image))))
(gimp-image-set-resolution
image xresolution yresolution)
(set! drawable (car (gimp-image-get-active-layer image)))
(gimp-file-save RUN-NONINTERACTIVE
image drawable filename filename)
(gimp-image-delete image))
(set! filelist (cdr filelist)))))
