Extended framework for Sindhi numerals OCR using gradient orientation histograms. - Anwar Ali Sanjrani; Junaid Baber; Maheen Bakhtyar; Ihsan Ullah 001; M. Shumail Naveed; Waheed Noor; Abdul Basit; Azam Khan; Naveed Sheikh (J. Intell. Fuzzy Syst., 2022)