RECOGNIZE: The American Sign Language (ASL) sign for "recognize / notice / detect"
 

This sign can mean such things as "catch my eye" or "I picked that one out right away."
 

This sign can mean:

"...to notice something or someone"
"...to recognize something or someone"
"...to detect something"
"...to spot someone or something"
"spied"
"it caught my eye"

Notes:  This sign is also "directional" in that it can be done in the direction of (or aimed at) the person or thing that was noticed or recognized.  By that I mean you can drop the left hand (or your non-dominant hand) and instead move your index finger in the direction of that which is being noticed.

NOTICE / recognize / detect (directional version):

You can add emotion, specificity, and location to the sign for NOTICE / recognize / detect: 

Notes:  See: SEE

See: NOTICE