Electronic and Arduino enthusiasts may be interested in a new creation by developer Paul Bartek, who has created an Arduino touchscreen display in the form of the Sunflower Shield.

The sensor forms an image and OpenCV detects the actual touch configuration. It appears you can use the raw data from the Arduino, too, but it might be a little harder.

EarthMake Shakes Internet of Things Market with an Arduino Compatible 3.5” Color Touchscreen Controller for $89 ...