Patent ID: 11940368
Assignee: LG ENERGY SOLUTION, LTD.
Field: Measurement (Instruments)
Classification: CPC G  B  H  Y | IPC B  G  H

Claim 3:
4. The method for pre-detecting a defective porous polymer substrate for a separator according to claim 2, wherein the quantifying the average value of pore distribution index (PDI) comprises:
acquiring a two-dimensional (2-D) binary image in which pixels of a raw image of the porous polymer substrate taken with the scanning electron microscope (SEM) are divided into pixels representing a plurality of polymer fibril regions adjacent to each other or spanning each other and pixels representing pore regions formed among the plurality of polymer fibrils;
carrying out distance transformation of the 2-D binary image by using a computational Euclidean distance transformation method; and
applying local maxima calculation to the 2-D binary image subjected to distance transformation to extract the distance transformation values of all of the pixels in the 2-D binary image and carrying out statistical processing.