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Start by opening your coloured photo in PI. I'm using the Classic
Car image from the Fill Gallery.
Duplicate your image twice by clicking on Ctrl+D two times and
then close the original photograph. The reason for this is so
that you don't mistakenly save changes to a photo that you'd rather
keep in it's original condition.
Miminize one of the duplicates, we'll need that one later.
Working on the photo that's still open in your workspace, right
click and select Copy. Right click again and select Paste.
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Click on Format/Hue & Saturation and move the saturation slider
down to -100. This will cause your photograph to become a monochrome
one.
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Right click and select Copy then right click again and select
Paste.
Click on Format/Invert
Right click and select Properties. Change the merge type to Addition
- You should now have a plain white image but the next step will
change that.
Click on Effect/Blur/Gaussian Blur. Click on the Options button
and select to blur by a radius of 20.
Click on OK
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Right click and select to Merge All.
Your image will have a hazy look about it which isn't quite appropriate
for our needs and still looks nothing like a sketch of any type,
but we'll fix that...
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Click on Effect/Sharpen/Emphasize Edges. Click on the Options
button and select to sharpen by 3.
Click on OK
Looking a little better but still it's still not quite right,
so we'll have to work on this image a little more.
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Click on Format/Level.
For the sake of this Classic Car image and working on the Master
Channel, change the Input Levels to 127 - 1.20 and 255.
Click on OK.
If you're using an image of your own, you might like to tweak
the settings a little by moving the black, grey and white sliders.
Move the black slider toward the right to bring out the black
lines in your image and move the white slider toward the left
to enhance the white areas. Finally adjust the grey slider if
you feel it necessary. Remember you can always click on the Reset
button and start again if you're not happy with how things are
going.
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Your image should now have the look of a pencil sketch, but if
you want to you can Click on Format/Level again to tweak a little
more.
Using the Classic Car image, I'm quite happy with the results
I have now, so I'll move on to the next step.
Right click and select to Copy.
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We will now work on the duplicate of the original photograph.
Right click and select Paste.
Click on the Lasso Tool. In the attributes bar change the Soft
Edge to 2 and then click on the Select on Objects icon.
NOTE for PI 8 users: If you don't
see this Select on Objects icon then you have not installed the
PI 8 Patch and will not be able to continue with this tutorial
as written.
You are now ready to slowly click around the object you wish
to bring out in your image until you get back to the starting
point. Be sure that you are happy with your selection and then
click on Finish.
Press the Delete key on your keyboard to clear the selected area.
Press on the Enter key to deselect the pencil-drawn background.
There should still be a selection line around your object.
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The Classic Car object is still looking a little on the dark side,
so I have chosen at this point to Click on Format/Level - I then
clicked on the Equalize button and moved black slider down to 35.
If you're using a different photograph you may not need to tweak
the levels at this stage.
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I'm not too keen on the colour red so I've elected to change
it to a more favourable colour. Follow along with me to change
a colour in your image too.
Click on Format/Color Replacement.
The settings I used to change all the red areas in the Classic
Car to blue are:
Similarity 133
Hue -155
Saturation -30
Lightness 0
Using the ordinary dropper, click on a red area of the car in
the left-hand preview pane to see the changes take place in the
right-hand preview pane.
If you're using the Classic Car image and would like a different
colour to the one I've chosen, then have a play with the Hue slider
to find a more suitable one.
If you're using a totally different photo, then you will need
to select the colour you wish to change using the dropper on the
left-hand side preview pane. See how your image is going to be
affected on the right-hand side preview pane. You may need to
click on the plus dropper to add the colour to areas that have
been missed or on the minus dropper to deselect areas that shouldn't
have been coloured. It's definitely worth taking your time over
this part.
Once you're happy with the new colour, click on OK.
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Select the top layer of your image (that's the pencil-drawn part).
Click on Format/Color Balance and change the Tone Balance to either
Shadow or Auto and then click on the thumbnails until you're happy
with the colouring in your image.
Click on OK.
Right click to select Merge All.
Right click to select Copy.
Right click to select Paste.
Right click to select Properties and then change the merge to
either Soft Light or Multiply, whichever you prefer.
Right click to select Merge All and then admire your masterpiece!
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