Symbol 5723 from IEC 60417 - Title/Meaning: Edge enhancement Function/description: To identify the control or the indicator to enhance the edges of an image, for example on diagnostic ultrasound equipment.
Additional information: 
Published in: Amendment 2, 2002,3C/473/FDIS,62A/228/CDV
Own work using: iso.org/obp/graphics/grs/8b5f5747-700c-4799-8839-c1716bdd8925 200.png
Vectorization:  Mrmw