Burr detecting apparatus and burr detection method thereof

A burr detection apparatus comprising:

• an imaging unit configured to capture an original image of a stencil, the original image comprises a plurality of black pixels and white pixels;
• and
• a detection unit comprising:
• a memory configured to store a number of matrix images from the original image of a stencil;
• and
• a FPGA integrated circuit comprising:
• an addressing circuit configured to provide coordinates information of the matrix images on the original image;
• a data conversion circuit configured to code each black or white pixel of the matrix images in the memory;
• a reading circuit configured to read the codes of a center pixel and the marginal pixels of the matrix images;
• a deciding circuit configured to detect whether the center pixel is a black pixel;
• an arithmetic circuit configured to obtain a black pixel total a black pixel total counted among the marginal pixels in a predetermined rule;
• and
• a comparator circuit configured to compare the black pixel total with a predetermined threshold number when the he center pixel is a black pixel, wherein when the lack pixel total is less than the predetermined threshold, the part of the stencil corresponding to the matrix image is determined to have a burr.

A burr detection method comprising:

• capturing an original image of a stencil;
• obtaining a number of matrix images from the original image;
• deciding if the center pixel of the matrix image is a black pixel;
• If yes, the counting module obtains a black pixel total counted among the marginal pixels of the matrix image in a predetermined rule;
• and
• comparing the black pixel total of the matrix image with a predetermined threshold number, and if the black-pixel number is less than the threshold number, a part of the stencil corresponding to the matrix image is determined to have a burr.