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TURNING
PHOTO INTO SKETCH |
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STEP
1 |
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Open an image. Here's my sample... a dog. You need to make sure that the image is on RGB mode, and not
indexed color image (gif files are indexed). If it's indexed, then convert it to
RGB (Image>>Mode>>RGB
Color).
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STEP 2 |
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Do Filter>>Sharpen More on the
image.
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STEP 3 |
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Do Filter>>Sharpen More again one
or two more times. Stop and undo the last filter once you you see double edges (or burns)
like what happened to the image on the right. Also stop when the image
staredt to look weird or when you see unwanted details.
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 We will be
utilizing the Photoshop Filter>>Sketch>>Graphic Pen to
create the sketch. If you have used this filter before, you might
have noticed that it's quite difficult to get a good sketch using this
filter. Especially when filtering a photograph of people
faces. Let's see some workaround to fully appreciate the potential
of this filter. The result won't be perfect, but it should be better than
usual.
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STEP
4 |
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Copy the picture you have sharpened in
Step 3 onto a new layer. Then do Filter>>Sketch>>Graphic
Pen. Use the setting similar to the one shown on the the
picture above. My result is shown on the right. Let's not comment on
how it looks right now, he he. |
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STEP
5 |
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Hide the layer you created on
Step4. Then copy the original picture you
have sharpened in Step 3 onto another new layer. Then do Filter>>Sketch>>Graphic
Pen again. (Yes, this is the same as the previous step.)
This time though, use Stroke length of 10. And keep the
other setting the same as before.
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STEP
6 |
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Copy the original color picture you have sharpened in Step 3 onto another
new layer. Then do Filter>>Sketch>>Graphic Pen
again. (Yes, this is the same as the previous step.) This
time though, use Stroke length of 15. And keep the other
setting the same as before.
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Now you should have 3 layers
of graphic-pen filtered images. Make sure the ones with longer
stroke length are on the upper layers.
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STEP
9 |
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Hide the colored images and change the
Opacity level on the Stroke 15 and 10 to 50%, here's what I got.
Better than usual, don't you think?
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SOME
OPTIONAL THINGS TO DO |
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Add hue to the sketch. Use
Image>>Adjust>>Hue/Saturation.
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Also, you can change the
Brightness/Contrast from
Image>>Adjust>>Brightness/Contrast. |
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NOTES |
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Remember, with a mechanical process like this, you will not
get a good result every time. But here are some
suggestions that might be useful on a more difficult picture:
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Increase the number of layers. Each layer should
contain an incremental Stroke Length (Ie: 2,5,8,10,12,15, etc).
Put the layer in decreasing order (longer strokes should be above
shorter strokes), then set opacity of each
layer to 50%.
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Add additional layer with opposing brush Strike
direction. This will give back details that are lost if the
image happens to have a subject with critical detail from opposing
light source.
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permadi@permadi.com
© F. Permadi
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