Homoglyph
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Karlgeorg Hoefer gave the zero with the FE script on German license plates an opening in the top right to avoid confusion.
Homoglyphs are similar or identical looking characters . It is particularly difficult to identify them if this cannot be deduced from the context, for example in certain key figures.
The letter O and the number 0 , as well as the letters I and l, are often confused with one another. Homoglyphs can also arise when using different alphabets. A Latin H , Cyrillic Н and Greek Η are difficult to distinguish from each other.
Mehrbuchstabige Homoglyphe can arise when several individual letters are visually recognized as a single letter: rn than m , cl as d or vv than w , sometimes fi as A .
Homoglyphs are a particular problem for text recognition programs .