Image Analysis and Diagnosis of Curtain Coating Defects
Presented by Aaron Clapp, Carestream Contract Manufacturing
An image processing technique was developed to quantify the severity of streak defects in multilayer films arising during curtain coating of a gelatin-based photographic film product. Film samples were digitized in a scanner and analyzed by a custom-built algorithm in MATLAB to measure streak severity as a function of cross- and down-web position. By calibrating the system with visible streak standards, it is possible to build an automated method for measuring streak severity and improving the consistency of streak measurements across rolls and trials. This has helped in assessing formulation and process changes for mitigating such defects.
