Automatic Measurement of Casting Surface Roughness Based on Digital Image Processing

Based on the digital image processing technique,a method for automatically measuring the three-dimensional parameters of casting surface roughness is put forward.In this method,the casting surface image is acquired by CCD and stored in the computer.Firstly,the mid-value filtering,the edge strengthen and the image binary conversion are used to pre-process the image,and then the values of casting surface roughness are got through characteristic acquisition.It is proved by the initial experiment that the three-dimension evaluation method put forward in the paper is feasible.