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Pop Art Preparation 
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Pop Art Photographic Conversion: Preparation
Pop Art Conversion Part One GIMP (Preparation)
GIMP (GNU) - Intermediate Plus - Weekend MasterClass
(
Pop Art Part 2 Colourise Here)
(
Pop Art Part 3 Change Colour)
(
Pop Art Part 4 Quarter Grid Here)

Click An Image To Access The Tutorial

Click An Image To Go The The Corresponding TutorialPop Art Part 1 PreparationPop Art Part 2 ColourisePop Art Part 3 Change The ColoursPop Art Part 2 Quarter Grid
Pop Art Conversion Part 1: Preparation

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This GIMP (GNU) tutorial demonstrates how to prepare an image prior to applying vivid pop art colours. And it is part one of my four-part GIMP Pop Art Photographic Conversion collection. (Part 2 Colourise Here; Part 3 Change Colour Here; Part 4 Quarter Grid Here). 

To work along, you are welcome to download the Start Image I am working with
HereUnzip the file and open the image onto GIMP’s workspace.

Note
Each photograph is unique, and therefore has different needs. With this in mind, when working with your image, it’s important to experiment with the settings outlined in this tutorial.

Notes
You can quickly Undo a step at any time by pressing Ctrl then Z. Alternatively, click a previous Undo History snapshot - Windows then Dockable Dialogues then click Undo History. In addition, to Zoom in (or Zoom out) of your image; from the top menu choose View then select a Zoom Tool
from the subsequent drop-down list.

(Pressing the Shift Key and then simultaneously tapping the + (Plus) Key enlarges - (zooms into), your image. Tapping the - (minus) Key zooms out of an image).

Layer Mask Blending
Eraser Tool Blending
Launch GIMP & Organise Its Workspace & Palettes

1/
Open your choice of Start Image onto GIMP’s workspace - File then Open - Ctrl then O.

Note
Ensure the Layers and the Undo History Palettes are visible, and then drag them into position over your workspace - (Windows then Dockable Dialogues - then click Layers and Undo History).



2/
Now, Duplicate the Background Layer by right-clicking over it and selecting Duplicate Layer from the subsequent drop-down list. Then repeat he Duplication one more time. You will now have three identical Layers in the Layers Palette - as illustrated below.
 


3/
Then left-click to remove the Top Layer’s Visibility Eye Icon. And then activate the Middle Layer - as illustrated below.



4/
Still working on the Middle Layer. From the top menu, choose Colours and then choose Threshold. You are looking to convert your photograph into a black and white bit map image. Therefore, from the subsequent Threshold dialogue box, drag the Black Point Triangle to the right and set it to around 105. Then drag the White Point Triangle to the left, and set it to around 226, and then click OK.



          

Tip
Now is a good time to save your Layered Image as a
GIMP XCF File.

5/
Now, click back the Top Layer’s Visibility Eye Icon. And then activate the Top Layer - as illustrated below.

         

6/
And still working on the Top Layer. From the top menu, choose Colours and then choose Threshold. You are looking to convert the Top Layer’s Image into a black and white bit map image. Therefore, from the subsequent Threshold dialogue box, drag the Black Point Triangle to the right and set it to around 109. Then drag the White Point Triangle to the left, and set it to around 238, and then click OK.



          

Eraser Tool Note
In the next step, (Chapter 7); you are going to erase some of the messy black pixels around the subject’s face using a Layer Mask. However, if you prefer, you can remove the Top Layer’s messy black pixels using the Eraser Tool. When using the
Eraser Tool utilise a Small Round Hard Brush.

If you are utilising the Eraser Tool instead of creating a Layer Mask,
Click Here to learn how to remove the Top Layer’s messy black pixels. Instructions are very similar for both the Eraser Brush Tool and Layer Masks.

                      

7/
Mask Layers For Beginners Tutorial Here.
It’s time to blend the two Black and White Bit Map Images using a
Layer Mask. Therefore, right-click over the Top Layer: - and from the subsequent drop-down list, choose Add Layer Mask. And from the subsequent Add Layer Mask dialogue box, enter the following default settings, and then click Add. A White Oblong (Mask) will then be added to the Top Layer.

             

Layer Mask (Rectangle) Note
Whilst editing the Top Layer’s Image, the Mask Layer must remain active at all times. If needed, you can reactivate the Layer Mask by left-clicking over White Rectangle (Layer Mask Thumbnail).

8/
Now, tap your Keyboard’s D Key. This sets the Foreground Colour Swatch to Pure Black and the Background Colour Swatch to Pure White - as illustrated below. 

(Alternatively, click the following tiny black and white swatch).


 
Important Note
To paint with Mask Layers, you must set the Foreground Colour Swatch to Black
If necessary, click the following Switch Foreground and Background Colours (double arrows tab) - or press your X Key to swap the Colour Swatches around.



Tip
When painting with Mask, remember, painting with Black removes pixels and Painting with White brings them back.

9/
Now, from the left-side Toolbox, activate the Paintbrush Tool.



And select a Hard Round Brush; and choose a Brush Size that’s suitable for your photograph’s needs. 

                       

Tip
You can quickly alter the Paintbrush’s Size by tapping your Keyboard’s Square Bracket Keys.



Zoom Tip
You will find the next step easier to achieve if you enlarge your image by Zooming into it. (I zoomed in twice).



B
ear in mind, when utilising the Zoom Tool, you need to adjust the Paintbrush Tool’s Size according to the amount of Zoom.



10/
Now, still working on the Masked Top Layer - left-click over your image, and remove the Top Layer’s messy black pixels. This reveals clear white pixels from the Underlying Layer
(the Middle Layer). You are looking to remove messy black pixels around the subject’s face, and to generally tidy up your image prior to the colourisation. 

Paintbrush Application Note
You can apply the Paintbrush in one continuous stroke. Alternatively, you can apply it one click at a time.

Step Backwards Note
You can quickly undo a paintbrush application by tapping Ctrl and then Z.



Note
For a traditional pop-art look leave a gritty bit map feel to the image. The areas that need to look clean are the eyes and mouth. After you have tidied the mouth, cheek and eye areas, you are ready for the next step.



11/
It’s time to merge the Top Layer with the Middle Layer. Therefore, right-click over the Top Layer. And from the subsequent drop-down list, click Merge Down - as illustrated below.

                      

Tip
Now is a good time to save your Layered Image as a GIMP XCF File.

12/
Now, activate the Paintbrush Tool once again. And ensure the Foreground Colour Swatch is Solid White.



And setting a Hard Round Brush, tidy your image by painting (with white) over any unwanted black pixels - as illustrated below.

  

Important
Don’t
merge the Layers.



Congratulations, you have prepared your image and it is ready to be colourised.
Now, proceed to my Pop Art Conversion Part Two Tutorial Here.

Pop Art Conversion Part 1: Preparation


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