Tuesday, November 23, 2010

Vectorizer Gradients 2

Another vectorizer image that was post processed to convert the flat color region fills into smoothly varying gradient fills. I again used the Morpholizer ip op to do the smooth gradient transformation.

The trick to this kind of processing is that you need to essentially apply a low frequency cutoff shelf filter to the original image. So you are removing a little bit of low spatial frequency information, which leads to flat color regions becoming smoothly shaded.

There are a lot of different ways you can do this. You can use the Blur ip op with the frequency inversion option, or in this case i'm using the Range Maximize algorithm in the Morpholizer, which applies an adaptive contrast boost that is removing low frequency spatial frequencies in the processed information. The Equalizer ip op would be another approach.

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