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This tutorial demonstrates how to convert parts of a coloured image into monochrome - this technique is also known as colour popping. To work along, you welcome to download the Start Images Here. Unzip the file and open the images onto Photoshop’s workspace.
Alternative Polygonal Lasso Tool Tutorial
Understand CS4, CS5 & CS6’s Workspace And Palettes
Undo and Navigation Steps
Two ways of undoing steps are from the top menu, Edit then Step Backwards. Alternatively, click a previous snapshot in the History Palette.
Navigate (zoom in and pan) your image using the Navigator Palette,
or the Zoom Tool. 
Activate The Hand Tool by tapping the Spacebar, keeping the Spacebar pressed, pan your image in the usual way. 
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Open the Start Images onto Photoshop’s workspace.
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Then from the Tools Toolbar, activate the Polygonal Lasso Tool.
And set the following attributes in its Options Bar.
Note
The Add to selection setting enables you to isolate more than one area of an image with a marquee - and it can be used to isolate single areas, also.
Tip - Retracing Your Steps
Whilst stretching the Lasso Line - and before the Selection Marquee has been applied: to go back one step, press either the Delete Key or the Backspace Key. Press your chosen key for however many steps you want to go back - this is for Window PC users, currently I am unfamiliar with Macs. Macs and Windows Shortcuts, on-line PDF.
Cancel The Selection Marquee Tip
To cancel the Selection Marquee whilst applying it: press your Keyboard’s ESC Key.
Now, carefully (bit-by-bit) left-click and stretch a Lasso Line around the contours of each Coloured Orb or the Union Flag.
 
After you have completed a full circuit; pass your curser over the point where you started it - then double-left-click. The lasso line will immediately change to a Selection Marquee - as illustrated below.
 
Coloured Orbs - Important!
After you have isolated the first orb, isolate the second then the third.
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After you have isolated (masked) the subject - or subjects, that are retaining their colour; from the top menu, choose Select then choose Inverse. The Selection Marquee will then isolate the subject (s) and the outside of the image - illustrated below.
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Now, from the top menu, choose Image then choose Adjustments then choose Desaturate. Then press Ctrl then D to remove the Selection Marquee. The Selection Marquee (s) have protected the isolated areas, and the areas outside them have been converted to monochrome.
Alternative Desaturation Filters And Commands
Alternative to the Desaturate filter is the Channel Mixer. Additionally, CS3/4//5 users can utilise its Black and White filter. Or perhaps utilise a Black and White Gradient
Map.
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Activate the Blur Tool, and set a very low Opacity, and very carefully, soften any harsh areas caused by the Selection Marquee.
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Congratulations, you have successfully colour popped your photograph, and it is ready to save.
Wendi E M Scarth. Top of Page - Home.
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