Sunday, August 7, 2011

High-Contrast Sketch

"High-Contrast Sketch"


How To Produce A High Contrast Sketch EffectCombining the Find Edges filter and the Overlay blending mode can produce a high-contrast sketch effect that works with many types of images. This recipe includes multiple Overlay layers, which boost contrast, so the recipe works particularly well with low-contrast images. In the recipe, I use three Overlay layers—you can use more or fewer, though more than three can produce excessive contrast. Another variation, if the result is too harsh, is to add some Gaussian Blur.

STEP 1
In the Layers palette, duplicate the original image layer by dragging the background layer onto the "Create a new layer" icon, or use Ctrl/Cmd-J.

STEP 2
Using the pull-down blending mode menu in the Layers palette, change the duplicate layer's blending mode to Overlay (or alternatively use the shortcut Alt/Opt-Shift-O) and rename it "Overlay 1."

STEP 3
Reduce the Overlay 1 layer's opacity to 60%.

STEP 4
Apply Filter > Stylize > Find Edges to the Overlay 1 layer.

STEP 5
Use Ctrl/Cmd-J to duplicate the Overlay 1 layer. Name the new layer "Overlay 2."

STEP 6
Use Ctrl/Cmd-F to apply Filter > Stylize > Find Edges to the Overlay 2 layer.

STEP 7
Repeat steps 5 and 6. An easy way to do this is to use Ctrl/Cmd-J followed by Ctrl/Cmd-F.

Direct Contrast
This recipe always adds contrast to the image, which this early morning shot needed.

How To Produce A High Contrast Sketch Effect

How To Produce A High Contrast Sketch Effect
Settings on all 3 layers are Opacity: 60, Fill: 100

Detailed Contrast
Pictures with plenty of detail are naturally suited to the Find Edges filter.

How To Produce A High Contrast Sketch Effect

How To Produce A High Contrast Sketch Effect

How To Produce A High Contrast Sketch Effect
Settings on all 3 layers are Opacity: 60, Fill: 100

Soft Contrast
Some subjects deserve a gentler treatment, so here I applied Gaussian Blur to the middle Overlay layer.

How To Produce A High Contrast Sketch Effect

How To Produce A High Contrast Sketch Effect

How To Produce A High Contrast Sketch Effect
Settings on all 3 layers are Opacity: 60, Fill: 100

Stark Contrast
This shot, taken in crisp, winter light, was already high-contrast, so I applied Gaussian Blur to the middle Overlay layer.

How To Produce A High Contrast Sketch Effect

How To Produce A High Contrast Sketch Effect

How To Produce A High Contrast Sketch Effect
Settings on all 3 layers are Opacity: 60, Fill: 100

Brassed Off
As an alternative, I applied the Emboss filter on the top layer. This produced a more textured finish.

How To Produce A High Contrast Sketch Effect

How To Produce A High Contrast Sketch Effect

How To Produce A High Contrast Sketch Effect
Settings on all 3 layers are Opacity: 60, Fill: 100


Photoshop Blending Modes Cookbook
"High-Contrast Sketch"

(Pages 68, 69 from the Recipes section of Photoshop Blending Modes Cookbook - courtesy of O'Reilly Media.)

2 comments:

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namida said...

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