Patent ID: 7310438

Claim:
A system for dispensing solder paste at a predetermined location through a stencil on a substrate comprising: a dispenser that dispenses material through the stencil and on the substrate; a vision system electrically coupled to the controller to capture images of the stencil; a controller for maintaining the operations of the dispenser; and a processor in electrical communication with the controller, the processor being programmed to: perform texture-base recognition of an image of a solder paste deposit located on the stencil; define a region of interest within the image of solder paste, the defined region of interest having a first axis, wherein a set of pixels in the image lie along the axis; compute, for each pixel along the axis, a sum of all the pixels in the region of interest that are in perpendicular alignment with the respective pixel along the axis; represent the sums of each pixel along the axis as a single dimensional array perpendicular to the axis; and evaluate the single dimensional array to determine whether any defects exist in the region of interest.