1. A method of detecting an object by a computerized imaging apparatus, the method comprising: observing an object, wherein the object comprises a pattern; sensing at least a portion of the pattern on the object; and identifying the object based on the sensed at least portion of the pattern; wherein the pattern comprises at least one of a patch of color or at least one medium that is undetectable via wavelengths that are visible to a human eye but detectable by the computerized imaging apparatus, wherein the pattern comprises the at least one medium, and sensing the pattern comprises sensing a first medium that is absorbent at a given wavelength range outside a given human-visible spectral range, and a second medium that is less absorbent in the given spectral range relative to the first medium, and wherein the first medium and the second medium comprise fiber threads woven into a textile of the object.