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Changing a photo into black and white

I am a engraver and I recently bought a laser engraver.. the basic principal is that it takes a two color image (blakc and white) and burns off the black areas to create the image in wood, glass, plactics.
The problem i am haveing is that I need to be able to change a photo, (or digtal pic) into 2 color.. I have been trying corel draw and using converting it to line art... sometimes it works most of the time not

Can anyone help?
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Socrates2k1
Asked:
Socrates2k1
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7 Solutions
 
mrwebdevCommented:
Photoshop is what I use, you can do wonders! I will post more if you are interested in Photoshop!
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mrwebdevCommented:
This file I just did with Photoshop by:
http://www.fanagle.com/ee/photo.jpg - Origional
http://www.fanagle.com/ee/photo-bw.jpg - Black & White


Converted the image to Grey Scale and adjuct the Curve levels.

Hope this helps, Good Luck!
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mrwebdevCommented:
Another step, you can invert it so that it would look like this:

http://www.fanagle.com/ee/photo-bw2.jpg - Black & White - Inverted
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mrwebdevCommented:
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HeadIdiotCommented:
If you don't want to cough up the cash for Photoshop or Paint Shop Pro (both excellent programs...theyjust cost ya) the best alternative is the GIMP.  It does just about everything both PS and PSP can do...it accepts their plug-ins and brushes...and is completely free.

http://www.gimp.org

It will do exactly what you are asking (and the same operations noted above) without the cash investment.

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Lobo042399Commented:
Hi Socrates,

There are several ways you can go around converting your images. One is, as you mention, using CorelTrace but the results vary depending on the complexity of the original. Another option is to convert to Greyscale and use Curves in Photoshop to gradually eliminate grey areas until you're left with a pure black and white image. You can also use some of the filters that come with Photoshop to give your b/w a nice effect. Lately I've been processing images for a client who does wood burning, and she likes the way images look after treated with the Poster Edges or Charcoal filters.

Good Vibes!

Lobo
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DaydreamsCommented:
Hi Socrates2k1,

You can use Irfanview (free) http://www.irfanview.com/

Image>convert to greyscale

..or image>Decrease color depth> choose 2 colors (black and white)

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AntonioPCommented:
If you have CorelDraw, you may also have PhotoPaint.  I know that when you convert to line art in Photopaint, you can select the crossover point where the brightness value gets converted to white instead of black.  If you're not getting a good B&W image, that's one good value to play with.  Also, as mentioned above, playing with contrast or curves before doing the line art thing can also help.  Most of the programs mentioned will do the job just fine.  Irfanview's the easiest to use, but might be a little "light" for tweaking your images.
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sg7_bizCommented:
If you have Corel Draw, do you have Corel Photopaint?

Corel Draw is a vertor package, designed to create images using objects and shapes.

Corel Photopaint is for working with images, bitmaps, jpg's, scanned images.

Now to convert from a colour image (32k colours) to b&w (2 colours) is a big jump, and you will have to play about to get the right result and it is different for each image.

First step I would take is to cover to grayscale, 256 colours (shades of gray).

Now for black and white a lot of detail has to be lost, 254 colours have to become balck or white.

The contrast control is a good starting point to help adjust the image before you get to b&w.

Play around with the controls and see what effect it has when you convert to b&w

Now the last think, you have different options of the type of black and white you do.

Now line art you have tried, best way to describe it is shadows.
other type when converting using photopaint are:
ordered
error diffusion
halftone

The other types are a like the print effect you get with b&w newspapers, dots making up the shape to give the effect of grayscale.

Now for your laser engraver you want to get the best results by doing the image to the best quality it can take and burn.
The higer the DPI (Dots per square inch) the smaller the dot can be in you b&w image.

For example screen is 75dpi, descktop printers are 300dpi to 1200dpi (some higher), printed mags can be around 2400dpi + and so on.

The more dots you can have the better the result will be for convert to 'ordered', 'error diffusion', 'halftone'.

Anyway, lots of info, let me know if any of it helps, you are getting in to a interesting area, with lots of different way to get the result you want.

Out of interest, how much is the laser engraver and where did you get it from, I would like to have a play with one. :)

Mark
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Lobo042399Commented:
>>>Corel Draw is a vertor package, designed to create images using objects and shapes.

>>>Corel Photopaint is for working with images, bitmaps, jpg's, scanned images.

I believe the point Antonio was trying to make is that the Corel Graphics Suite includes both CorelDraw and CorelPhotoPaint, so having one may mean having the other one as well.
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anton_cronjeCommented:
A good way to get simple B & W images is to open the color photo in Photoshop, do a select all (CTRL A), Create a new document (CTRL N), in the new window dialog box, go to the mode drop down box and select grayscale. click OK.

Paste your image into the new window (it will be B & W)
On the top menu bar select --> image ---> mode --> duotone.
in the duotone option, in the type drop down, select duotone, specify black and white (color selection), give them a name, click OK.

you image should be pure B & W.
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HeadIdiotCommented:
I'm always interested to know how the problem was resolved...even if it wasn't my way.
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Lobo042399Commented:
Yup
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sg7_bizCommented:
Would be nice, plus sound like an interesting bit of kit, would like to know more about it.
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DaydreamsCommented:
I would suggest a split, as most experts here gave good suggestions, though it is difficult to tell which worked best for the asker.
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Lobo042399Commented:
:o)
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