Processing Editting

[ Open image > Click Select >Color Range ]

[ Select > Shadows > OK ]

[ Ctrl+C > Ctrl+Shift+N > Ctrl+V ]

[ Click Edit > Click Fill ]

[ Use 50% Gray + Click Preserve Tranparency > OK ]

Image will shown like this..

The same things then Click Midtones..

Same things too.. make new layer , copy n paste..

Fill with black colour with same direction..

Shown like this ..

[ Click brush > use brush that have word pattern >
paste to the new layer ]

[ Select the selection > Copy > Paste to new layer by copy ]

Change the colour to rainbow..