초록 ▼

Inspection of solder paste on a printed circuit board using a histogram of an image before printing (pre-application image) to normalize an image after printing of the printed circuit board (post-application image) is described. Existing lighting and optics used for alignment of the screen-printing

Inspection of solder paste on a printed circuit board using a histogram of an image before printing (pre-application image) to normalize an image after printing of the printed circuit board (post-application image) is described. Existing lighting and optics used for alignment of the screen-printing stencil to the printed circuit board are used for the solder paste inspection.

대표청구항 ▼

[ What is claimed is:] [1.] A method of identifying a first region within a second-state image, the method comprising:providing a first-state image having a first region;calculating at least one first-state characteristic representative of at least the first region of the first-state image;acquiring

[ What is claimed is:] [1.] A method of identifying a first region within a second-state image, the method comprising:providing a first-state image having a first region;calculating at least one first-state characteristic representative of at least the first region of the first-state image;acquiring the second-state image having the first region and the at least one other region, the second-state image differing from the first-state image;calculating a second-state histogram representative of the first region and the at least one other region within the second-state image;augmenting the second-state histogram using the at least one first-state characteristic by enhancing the representation of the first region relative to at least one other region to provide an augmented second-state histogram; andidentifying the first region within the second-state image using the augmented second-state histogram.