Ekawat Chaowicharat และ Kanlaya Naruedomkul. (2016) Direction histogram: novel discriminative global feature for Thai offline handwritten OCR. Mahidol University:ม.ป.ท.Ekawat Chaowicharat และ Kanlaya Naruedomkul. 2016. Direction histogram: novel discriminative global feature for Thai offline handwritten OCR. ม.ป.ท.:Mahidol University;Ekawat Chaowicharat และ Kanlaya Naruedomkul. Direction histogram: novel discriminative global feature for Thai offline handwritten OCR. ม.ป.ท.:Mahidol University, 2016. Print.