How to filter some characters

[hi1027]

hello , i want filter some characters, How to do？
instance.setTessVariable("tessedit_char_whitelist", "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ");

[nguyenq]

Yes, have you tried the code?

[hi1027]

@nguyenq but this is whitelist , i want blocklist

[nguyenq]

instance.setTessVariable("tessedit_char_blacklist", "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ");

[hi1027]

@nguyenq you tried the code?

[nguyenq]

To get better help, please provide a Minimal, Complete, and Verifiable example. Also list your software development configuration.