Patent ID: 6738505
Filing Date: 2004-05-18
Classification: B23K,G01N,H05K

Abstract:
A screen printer for dispensing a viscous material at a predetermined location on a substrate comprising:a frame; a material dispenser, coupled to the frame, the material dispenser containing a viscous material to be printed on a substrate; a support apparatus, coupled to the frame, that supports the substrate in a printing position located beneath the material dispenser; a camera having a field of view that includes an image of the substrate; and a processor in electrical communication with the camera, the processor being programmed to perform texture recognition on the viscous material printed on the substrate the processor comprising: a locator that performs location analysis on various pixels in the image; a tuner that varies brightness and contrast levels in the image and includes an automatic gain, offset, and exposure management system wherein the tuner provides aliasing control based on an effective sampling rate; and a texture segmentation filter, in electrical communication with the locator, that includes at least one of a sharpening operator, a Laplace operator, and a smoothing operator.