A German company called TST-inno has introduced very awesome sensor technology that can detect the transform of lines or surfaces. The video below shows a demo of 1D sensor application.
The company also offers 2D form sensor:
Wednesday, December 4, 2013
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Force, Pressure, and Touch - kitronyx.com
Force pressure touch technology: FSR sensor, electronics, firmware and software
Design Service Low Cost Pressure Mapping
Force pressure touch technology: FSR sensor, electronics, firmware and software
Design Service Low Cost Pressure Mapping