Abstract: The porosity of the lattice apron fabric was inspected by image processing method. The scanned image of lattice apron fabric was converted into a binary image by threshold segmentation. The diameter of warp and weft yarns was determined by the projection data of the binary image. The theoretical porosity was calculated according the diameter and density of yarns. The interferential white regions on image were removed by judging whether they were in the body of the yarns or not. Then the binary image was reversed and filtered to remove small white regions. Pore characters such as the number of pores, the area size of pores, the distribution of pores and actual porosity, were extracted and small pores were marked. The experimental result shows that the pore characters by image processing method can objectively reflect the porosity of the lattice apron and the uniformity distribution of the pores.

Key words: image processing, lattice apeon fabric, porosity, yarndiameter, pore size distribution