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Table 6 Lookup table for character classes—possible occurrences of dots/diacritics

From: Segmentation-free optical character recognition for printed Urdu text

Character class

Character class shape

Possible dot/diacritic number

Alif

9

Bay

1, 2, 3, 4, 5, 6, 7, 10, 11, 13, 14

Jeem

1, 2, 6

Daal

1, 13

Ray

1, 5, 13

Seen

5

Suad

1

Toyen

1

Ain

1

Fay

1, 3

Qaaf

3

Kaaf

8

Laam

11

Meem

−1

Noon

1

Waw

−1

Aik-chashmi Hey

−1

Dochashmi-Hey

−1

Choti-Yaye

−1

Bari-Yaye

10, 14