กระดาษและผลิตภัณฑ์กระดาษ
เอกสารมาตรฐาน
สหรัฐอเมริกา
TAPPI
T 537 om-21
Dirt count in paper and paperboard (optical character recognition – OCR)
2021
4
offline
This method is suited for the numerical estimation of cleanliness for optical character recognition
(OCR) purposes of paper and paperboard in terms of the frequency of dirt, specks, or marks. For other dirt count
methods, see TAPPI T 437 “Dirt in Paper and Paperboard,” TAPPI T 213 “Dirt in Pulp,” and TAPPI T 563,
“Equivalent Black Area (EBA) and Count of Visible Dirt in Pulp, Paper and Paperboard by Image Analysis.” ....