Screen Printing: Posterization of an Image

using Adobe Photoshop

Graphic Comm. II

Mr. Jarrett

Lesson Objectives

Changing to Grayscale Resizing & Cropping Adjusting Contrast Levels Posterization Filter Separating Layers Applying Color

Original Image

Changing to Grayscale

Step 1:

Image >

Mode > Grayscale

Resizing & Cropping

Step 2:

Measure the dimension of the shirt you wish to print on

To resize go to:

Image > Image Size

Here set the size dimensions

Adjusting Contrast Levels

Step 3:

You need adjust the contrast levels to bring out the details in the image

Go to:

Image > Adjustments > Levels

Here adjust the contrast levels using the levels histogram

Posterization Filter

Step 4:

Next posterize the image so that the colors can be separated into different layers

Go to:

Filters > Artistic > Poster Edges

Here adjust settings to give you the desired effect

Separating Layers

Step 5:

Separating the color layers can be the hardest part

Go to:

Select > Color Range

Here use the eyedropper tool to select the Blacks

Once selected: Copy & Paste it onto a new layer

Separating Layers

Step 6:

Repeat Step 5

Go to:

Select > Color Range

Here use the eyedropper tool to select the Grays

Once selected: Copy & Paste it onto a new layer

Applying Color

Step 7:

Change your document back into an RGB file

Image>Mode>RGB

Then change the gray layer into a color

The resulting image should look something like this