Each automobile moving down the assembly line has dozens of different components ranging from the dashboard and seats, down to tiny fastener covers that must be exactly the right color.Īnother challenging automotive interior application is inspecting buttons that have light emitting diodes behind them that must be the right color and often are designed to cast different colors in day and night conditions. Automotive interior colors are often so similar to each other that it is often difficult to distinguish between them, even when they are placed in close proximity to each other. Color Vision ApplicationsĪutomotive interiors represent a very important color vision application. Software-based inspection items that process the image to determine whether to pass or fail the product are critical to robust inspections. The application is normally developed in the lab where different approaches can quickly be evaluated. The first step in any machine vision application is defining the specifications, such as obtaining agreement on the differences between a good and a bad part, and obtaining samples of each. The type of color processing is also important with the most advanced type of processing representing color images in 3D red-green-blue (RGB) space. Selecting the vision sensor type is important, with the trend currently running away from charge coupled device (CCD) sensors and towards complementary metal-oxide semiconductor (CMOS) sensors because of the latter’s ability to operate at higher speeds. Color machine vision identifies position of black carpet against black background. Typical examples include ensuring that a tan rather than a taupe automotive interior component is installed, and checking the position of a black label on a black single-serving coffee cup. Color provides critical information that can improve the reliability of many machine vision inspection applications and make it possible to inspect many products that cannot be inspected in grayscale.
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