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NI vision module improves inspection and code reading

National Instruments is releasing the newest version of the NI Vision Development Module, a comprehensive library of image processing and machine vision functions for multiple programming languages, including NI LabVIEW and LabWindows/CVI as well as Microsoft C, C++, Visual Basic and .NET. With features including an improved edge-detection algorithm and support for new 2D codes, machine designers can more efficiently enhance images, check for the presence of components, locate features, identify objects and measure parts.

Vision Development Module 8.5 enables engineers to locate hard-to-find edges such as those in many web-inspection applications. They can also reliably find edges at 1/25 or better pixel accuracy and offer improved reliability in images with noise - a 10-times improvement in accuracy over the previous method. For example, in an image with added uniform noise of amplitude 10, the maximum error dropped from 4/10 of a pixel to 5/100 of a pixel with the new edge detector.

Additionally, engineers can detect straight-edged lines in images, which helps them detect multiple intersecting lines that appear in the image at different orientations. The edge detector also provides support for calibrated images and incorporates calibration information, including image distortion associated with the image, as part of the edge-detection process.


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