Duct Tape Art

Step 3: Quantise Picture

Use a program that you are familiar with to turn the image in to the right number of colours.

There is normally a function called posterise. That is the function you want. This is the case on paint.net and photoshop. You might want to apply an average noise filter reduction first to smooth the image too. 

I actually used an iPad app to do this (see comments for details), but it can be done in pretty much any paint software. If you don't have any paint software paint.net is free and fairly easy to use. 

I chose 3 colours. Generally paint software lets you choose the limits if each colour. Try to get a good balance.

Print out at least 2 copies. 1 for cutting through, and 1 for reference when separating layers later. I printed 4 just in case I made a mistake.

Comments

[wellabovezero]

Which iPad app did you use?

[Mr_o_uk]

The app I used was called "poster me hd lite" on iPad or "poster me lite" on iPhone. The free/lite one won't let you save the image, but you can take a snapshot of the screen (press power and home together) and crop the part you want anyway!

Have a fiddle with the sliders til you get the best results.

This app will only let you have 2 or 3 colours. If you want more, you will have to use some computer software.