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Photoshop Tutorial – Photo to Lineart

ORIGINALLY POSTED BY ALLY FOR THETAZZONE/TAZFORUM HERE

Lets have a look at changing a photograph to lineart. Some photos are going to be easier to convert to lineart than others. For example, the simpliest would be anything with straight, definate lines … like buildings, walls, furniture etc., Some images are going to convert well straight away, others may need a little more manipulation.

You are going to have a couple of different filters that can be used and a couple of adjustments to tweak …… like we would expect anything else from Photoshop :-)

Grab my birdie image below to practise on if you like …. no larger images than this, so just right click and save as.

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Once you have the image open in Photoshop, double click on the b/ground and accept the default Layer 0 …. or rename it. Then duplicate the layer and from the top menu bar go to Image>Adjustments>Desaturate or use the keyboard shortcut Ctrl+Shift+U

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The Find Edges filter, found under Filter>Stylize>Find Edges doesn’t give us a dialogue box to tweak, but go ahead and use that filter now on the desaturated layer if you like. You can see that it hasn’t done that bad a job, especially with this image.

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Go to the top menu bar and use Image>Adjustments>Levels and you can punch in the same numbers that I have below, or use some of your own.

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Lets back up and try the Poster Edges Filter. In your History Palette click back on Desaturate. If your history palette isn’t open go to Window>History. Open the Filter Gallery by going to Filter>Filter Gallery and then open the Artistic Folder, then click on Find Edges. I don’t know if you can see the numbers I punched in, but they were Thickness 1 – Intensity 1 – Posterization 6. Click OK.

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So that looks awful :-) Go to the top menu bar and choose Image>Adjustments>Levels to bring up the levels dialogue box. You can see in the image below, that I’ve really had to push the numbers to get a reasonable effect. I think the eyes have turned out better in this version than the find edges version.

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In the final image below I have blended together the Find Edges and the Poster Edges layers. I filled the b/ground (birdie) with white and used the eraser tool on both of the other layers to take away what I didn’t want. I could have gone in and dodged some of the darker lines to make them less prominent, but overall this hasn’t turned out too bad for a rather complicated image. Try doing a building yourself and you’ll see how much easier it is :-)

You can also use Curves and Brightness/Contrast from the top menu bar instead of Levels. You can also leave the b/ground bird as it was and take the opacity of your desaturated down to bring some colour back in to the bird.

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