You can give your photos a dramatic effect by converting them to sketch, while keeping the region and details that
you choose in color.
1. Use your finger as a brush to "paint" area of the sketch image, or to bring back the original color.
2. Move photo by two-finger move.
3. Zooming in and out by two-finger pinching.
Add a demo circle to indicate which pixels will be changed.
Add more image effects.