intrigued by an image in an intermediate guide to digital photography by john clements demonstrating how to turn a photo into an “ink drawing” using various photoshop filters, i set out to accomplish the same with gimp…i took one of the althagen harbour pictures and started out:
- first, created a layer copy
- applied some liberal gaussian blurring on the layer copy
- then, pumped it through edge detection (using gaussian blurring)
- followed this with a threshold operation to reduce the result of the previous operation to a black & white line art layer
- next, i created another layer copy
- cut out all the white areas by using the selection by color operation
- applied another blurring to that layer
- finally, changed the opacity of the first line art layer to about 60-70%
see for yourself, i quite like the effect 
