System and method for efficient surface measurement using a laser displacement sensor

摘要

This invention provides a system for measuring displacement of an object surface having a displacement sensor that projects a line on the object surface and receives light from the projected line at an imager in a manner defines a plurality of displacement values in a height direction. A vision system processor operates on rows of imager pixels to determine a laser line center in columns of imager pixels in each of a plurality of regions of interest. Each region of interest defines a plurality of rows that correspond with expected locations of the projected line on the object surface. A GUI can be used to establish the regions. In further embodiments, the system generates grayscale images with the imager. These grayscale images can be compared to a generated height image to compensate for contrast-induced false height readings. Imager pixels can be compared to a reference voltage to locate the line.

主权项

1. A system for correcting a suspect pixel in a grayscale image, comprising:
a computer processor; and a memory including instructions thereon that, when executed by the processor, cause the processor to:
generate laser line position data and corresponding laser line intensity data based in part on an acquired image of an object, where the laser line position data comprises at least one laser line position datum corresponding with an associated pixel within the acquired image;identify at least one laser line position datum associated with a suspect pixel location;substitute, using the processor, an original value of the laser line intensity datum corresponding to the identified laser line position datum with a substitute value for the imaged pixel of the laser line intensity datum; andgenerate the grayscale image from the laser line position data and corresponding substituted laser line intensity data.