balck and white image prob.

RB
Posted By
rob bufaks
Sep 5, 2003
Views
398
Replies
9
Status
Closed
Hi all, is there a way to convert my grayscale into a b/w without making it a bitmap (since it makes massive pixel changes). I am looking for a smooth cut betwwen the blacks and the whites, but all i get is pixel ladders … anyone please?

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TD
Thee_DarkOverLord
Sep 5, 2003
I am looking for a smooth cut betwwen the blacks and the whites,

Thats what grey scale will do for you, you could try vector tracing it, or redrawing it in a vector package.
Y
YrbkMgr
Sep 5, 2003
Rob,

The solution doesn’t lie in making it B/W. Black and White is basically 1’s and 0’s – black or white, and that won’t solve jaggies.

In order to help, really, you ‘d have to explain what you are doing, how you’re trying to do it, and the intent of the image (web, print, etc.). You might consider posting the image on the web somewhere and tell us the link so you can get better (or at least broader) advice.

What TDO was saying is that if you need it crisp, vector is ONE way to do it (and a very good way), but depending on the image and its intent, it may not be practical.

So give us more information like – are you scanning it in? Where is the ‘artifact’ showing up – web pages or in photoshop or in print or what?

If you can give us more info, you’ll probably get better help.

Peace,
Tony
L
LenHewitt
Sep 5, 2003
Image>Adjustments>Posterize ?
DM
Don McCahill
Sep 5, 2003
I was thinking posterize as well. I’m not sure if it works with grayscale images. If not, change the mode to RGB, posterize, and then change back to grayscale.
RB
rob bufaks
Sep 5, 2003
as always … you guys are the best. the amount of stuff i learn here is incredible. Thank you all. I would like to post the image (that is intended for printing) but I do not have a web page … 🙁 .
But i’ll try and work something out.
Thanks again.
L
LenHewitt
Sep 5, 2003
Works fine in greyscale, Don.

I sometimes use it for creating complex mask which can then be loaded into the alpha of a colour version…
Y
YrbkMgr
Sep 5, 2003
See:

YrbkMgr "re black and white issue (below)" 9/5/03 9:00am </cgi-bin/webx?13/0>

Now that I know what this is about, Len’s suggestion works great.
RB
rob bufaks
Sep 5, 2003
yup, i tried the posterize effect and it does work, in my particular case it worsen things but that’s another thing (I guess i was hoping a better result).
Thanks again for your support !
Y
YrbkMgr
Sep 5, 2003
Play with the number of levels in posterize – I did that and found some pretty acceptable results.

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